Free Reverse Phone Lookup

Free Phone Number Finder

Enter phone number to begin your search


Example: 999-999-9999

Detailed Information on Area Code 312

Reverse lookup results for area code 312

Country United States of America
State ILLINOIS
Area Code 312
Date First Introduced Feb 04 1994
Timezone (UTC-06:00)
Major Counties COOK, DU PAGE
Major Cities CHICAGO, WHEELING, HINSDALE, LA GRANGE PARK, NORTHBROOK, ROSELLE
Related Area Codes 217 224 309 618 630 708 773 815 847

Location map for area code 312 in ILLINOIS


Following is the list of available exchanges for area code 312 in ILLINOIS -


HINSDALE
Area Code 312-301 - (Southwestern Bell Mobile Systems, Llc - Il - 312301 )Area Code 312-304 - (Southwestern Bell Mobile Systems, Llc - Il - 312304 )Area Code 312-314 - (Southwestern Bell Mobile Systems, Llc - Il - 312314 )Area Code 312-352 - (Southwestern Bell Mobile Systems, Llc - Il - 312352 )Area Code 312-510 - (Southwestern Bell Mobile Systems, Llc - Il - 312510 )Area Code 312-531 - (Southwestern Bell Mobile Systems, Llc - Il - 312531 )Area Code 312-699 - (Southwestern Bell Mobile Systems, Llc - Il - 312699 )Area Code 312-749 - (Southwestern Bell Mobile Systems, Llc - Il - 312749 )Area Code 312-816 - (Southwestern Bell Mobile Systems, Llc - Il - 312816 )Area Code 312-844 - (Southwestern Bell Mobile Systems, Llc - Il - 312844 )Area Code 312-990 - (Southwestern Bell Mobile Systems, Llc - Il - 312990 )
NORTHBROOK
Area Code 312-209 - (Cellco Partnership Dba Verizon Wireless - Il - 312209 )Area Code 312-305 - (Cellco Partnership Dba Verizon Wireless - Il - 312305 )Area Code 312-310 - (Cellco Partnership Dba Verizon Wireless - Il - 312310 )Area Code 312-934 - (Heartland Communications, Inc. - 312934 )Area Code 312-956 - (Source One Wireless - 312956 )
WHEELING
Area Code 312-215 - (Southwestern Bell Mobile Systems, Llc - Il - 312215 )Area Code 312-246 - (Southwestern Bell Mobile Systems, Llc - Il - 312246 )Area Code 312-303 - (Southwestern Bell Mobile Systems, Llc - Il - 312303 )Area Code 312-317 - (Southwestern Bell Mobile Systems, Llc - Il - 312317 )Area Code 312-331 - (Southwestern Bell Mobile Systems, Llc - Il - 312331 )Area Code 312-406 - (Southwestern Bell Mobile Systems, Llc - Il - 312406 )Area Code 312-412 - (Southwestern Bell Mobile Systems, Llc - Il - 312412 )Area Code 312-518 - (Southwestern Bell Mobile Systems, Llc - Il - 312518 )Area Code 312-524 - (Southwestern Bell Mobile Systems, Llc - Il - 312524 )Area Code 312-615 - (Southwestern Bell Mobile Systems, Llc - Il - 312615 )Area Code 312-865 - (Southwestern Bell Mobile Systems, Llc - Il - 312865 )Area Code 312-991 - (Southwestern Bell Mobile Systems, Llc - Il - 312991 )
LA GRANGE PARK
Area Code 312-295 - (Arch Wireless Holdings, Inc. - 312295 )Area Code 312-318 - (Cellco Partnership Dba Verizon Wireless - Il - 312318 )Area Code 312-366 - (Arch Wireless Holdings, Inc. - 312366 )Area Code 312-367 - (Arch Wireless Holdings, Inc. - 312367 )Area Code 312-403 - (Cellco Partnership Dba Verizon Wireless - Il - 312403 )Area Code 312-501 - (Cellco Partnership Dba Verizon Wireless - Il - 312501 )Area Code 312-517 - (Arch Wireless Holdings, Inc. - 312517 )Area Code 312-717 - (Arch Wireless Holdings, Inc. - 312717 )Area Code 312-968 - (Cellco Partnership Dba Verizon Wireless - Il - 312968 )Area Code 312-969 - (Cellco Partnership Dba Verizon Wireless - Il - 312969 )
CHICAGO
Area Code 312-201 - (Ameritech Illinois - 312201 )Area Code 312-202 - (Ameritech Illinois - 312202 )Area Code 312-203 - (Southwestern Bell Mobile Systems, Llc - Il - 312203 )Area Code 312-204 - (Ameritech Illinois - 312204 )Area Code 312-205 - (Allegiance Telecom, Inc. - Il - 312205 )Area Code 312-206 - (Southwestern Bell Mobile Systems, Llc - Il - 312206 )Area Code 312-207 - (Ameritech Illinois - 312207 )Area Code 312-208 - (Southwestern Bell Mobile Systems, Llc - Il - 312208 )Area Code 312-210 - ( - 312210 )Area Code 312-212 - (Ameritech Illinois - 312212 )Area Code 312-213 - (Southwestern Bell Mobile Systems, Llc - Il - 312213 )Area Code 312-214 - (Ameritech Illinois - 312214 )Area Code 312-216 - (Source One Wireless - 312216 )Area Code 312-217 - (United States Cellular Corp. - 312217 )Area Code 312-218 - (Southwestern Bell Mobile Systems, Llc - Il - 312218 )Area Code 312-220 - (Ameritech Illinois - 312220 )Area Code 312-221 - (Heartland Communications, Inc. - 312221 )Area Code 312-222 - (Ameritech Illinois - 312222 )Area Code 312-223 - (Ameritech Illinois - 312223 )Area Code 312-224 - (Focal Communications Corp Of Illinois - 312224 )Area Code 312-225 - (Ameritech Illinois - 312225 )Area Code 312-226 - (Ameritech Illinois - 312226 )Area Code 312-228 - (Ameritech Illinois - 312228 )Area Code 312-229 - (Ameritech Illinois - 312229 )Area Code 312-230 - (Ameritech Illinois - 312230 )Area Code 312-232 - (Airtouch Paging - Illinois - 312232 )Area Code 312-233 - (Ameritech Illinois - 312233 )Area Code 312-234 - (Ameritech Illinois - 312234 )Area Code 312-235 - (Ameritech Illinois - 312235 )Area Code 312-236 - (Ameritech Illinois - 312236 )Area Code 312-237 - (Cellco Partnership Dba Verizon Wireless - Il - 312237 )Area Code 312-238 - (Focal Communications Corp Of Illinois - 312238 )Area Code 312-239 - (At&t Local - 312239 )Area Code 312-240 - (Ameritech Illinois - 312240 )Area Code 312-241 - (Heartland Communications, Inc. - 312241 )Area Code 312-242 - (Teleport Communications Group - Chicago - 312242 )Area Code 312-243 - (Ameritech Illinois - 312243 )Area Code 312-244 - (Ameritech Illinois - 312244 )Area Code 312-245 - (Ameritech Illinois - 312245 )Area Code 312-249 - (Arch Wireless Holdings, Inc. - 312249 )Area Code 312-250 - (Metrocall - 312250 )Area Code 312-251 - (Ameritech Illinois - 312251 )Area Code 312-252 - (Allegiance Telecom, Inc. - Il - 312252 )Area Code 312-253 - (Allegiance Telecom, Inc. - Il - 312253 )Area Code 312-254 - (Allegiance Telecom, Inc. - Il - 312254 )Area Code 312-255 - (Ameritech Illinois - 312255 )Area Code 312-256 - (Allegiance Telecom, Inc. - Il - 312256 )Area Code 312-258 - (Ameritech Illinois - 312258 )Area Code 312-259 - (Southwestern Bell Mobile Systems, Llc - Il - 312259 )Area Code 312-260 - (Mcimetro, Ats, Inc. - 312260 )Area Code 312-261 - (Focal Communications Corp Of Illinois - 312261 )Area Code 312-262 - (Allegiance Telecom, Inc. - Il - 312262 )Area Code 312-263 - (Ameritech Illinois - 312263 )Area Code 312-264 - (Focal Communications Corp Of Illinois - 312264 )Area Code 312-266 - (Ameritech Illinois - 312266 )Area Code 312-267 - (Ameritech Illinois - 312267 )Area Code 312-268 - (Focal Communications Corp Of Illinois - 312268 )Area Code 312-269 - (Ameritech Illinois - 312269 )Area Code 312-271 - (Arch Wireless Holdings, Inc. - 312271 )Area Code 312-272 - (Metrocall - 312272 )Area Code 312-274 - (Ameritech Illinois - 312274 )Area Code 312-275 - (Allegiance Telecom, Inc. - Il - 312275 )Area Code 312-276 - (Allegiance Telecom, Inc. - Il - 312276 )Area Code 312-277 - (Allegiance Telecom, Inc. - Il - 312277 )Area Code 312-278 - (Focal Communications Corp Of Illinois - 312278 )Area Code 312-279 - (Mcimetro, Ats, Inc. - 312279 )Area Code 312-280 - (Ameritech Illinois - 312280 )Area Code 312-281 - (Global Crossing Local Services, Inc.-il - 312281 )Area Code 312-282 - (At&t Wireless Services, Inc. - 312282 )Area Code 312-283 - (Global Crossing Local Services, Inc.-il - 312283 )Area Code 312-284 - (Xo Illinois, Inc. - 312284 )Area Code 312-285 - (Sprint Spectrum L.p. - 312285 )Area Code 312-286 - (At&t Wireless Services, Inc. - 312286 )Area Code 312-287 - (Nextel Communications - 312287 )Area Code 312-288 - (Intermedia Communications Inc. - Il - 312288 )Area Code 312-289 - (Metrocall - 312289 )Area Code 312-290 - (Metrocall - 312290 )Area Code 312-291 - (Ameritech Illinois - 312291 )Area Code 312-293 - (Ameritech Illinois - 312293 )Area Code 312-294 - (Ameritech Illinois - 312294 )Area Code 312-296 - (Nextel Communications - 312296 )Area Code 312-297 - (Ameritech Illinois - 312297 )Area Code 312-298 - (Sprint Communications Company, L.p. - Il - 312298 )Area Code 312-299 - (Arch Wireless Holdings, Inc. - 312299 )Area Code 312-300 - (Ameritech Illinois - 312300 )Area Code 312-302 - (Ameritech Illinois - 312302 )Area Code 312-306 - (Ameritech Illinois - 312306 )Area Code 312-307 - (Southwestern Bell Mobile Systems, Llc - Il - 312307 )Area Code 312-308 - (Ameritech Illinois - 312308 )Area Code 312-309 - (Ameritech Illinois - 312309 )Area Code 312-313 - (Source One Wireless - 312313 )Area Code 312-315 - (Southwestern Bell Mobile Systems, Llc - Il - 312315 )Area Code 312-316 - (Southwestern Bell Mobile Systems, Llc - Il - 312316 )Area Code 312-320 - (Southwestern Bell Mobile Systems, Llc - Il - 312320 )Area Code 312-321 - (Ameritech Illinois - 312321 )Area Code 312-322 - (Ameritech Illinois - 312322 )Area Code 312-323 - (Ameritech Mobile Services, Inc. - 312323 )Area Code 312-324 - (Icg Telecom Group - Il - 312324 )Area Code 312-325 - (Ameritech Illinois - 312325 )Area Code 312-326 - (Ameritech Illinois - 312326 )Area Code 312-327 - (Xo Illinois, Inc. - 312327 )Area Code 312-328 - (Ameritech Illinois - 312328 )Area Code 312-329 - (Ameritech Illinois - 312329 )Area Code 312-330 - (Southwestern Bell Mobile Systems, Llc - Il - 312330 )Area Code 312-332 - (Ameritech Illinois - 312332 )Area Code 312-333 - (Ameritech Mobile Services, Inc. - 312333 )Area Code 312-334 - (Globalcom, Inc.-il - 312334 )Area Code 312-335 - (Ameritech Illinois - 312335 )Area Code 312-336 - (Ameritech Illinois - 312336 )Area Code 312-337 - (Ameritech Illinois - 312337 )Area Code 312-338 - (Ameritech Illinois - 312338 )Area Code 312-339 - (Cellco Partnership Dba Verizon Wireless - Il - 312339 )Area Code 312-341 - (Ameritech Illinois - 312341 )Area Code 312-342 - (At&t Wireless Services, Inc. - 312342 )Area Code 312-343 - (Cellco Partnership Dba Verizon Wireless - Il - 312343 )Area Code 312-344 - (Ameritech Illinois - 312344 )Area Code 312-345 - (Ameritech Illinois - 312345 )Area Code 312-346 - (Ameritech Illinois - 312346 )Area Code 312-347 - (Ameritech Illinois - 312347 )Area Code 312-349 - (Arch Wireless Holdings, Inc. - 312349 )Area Code 312-350 - (Cellco Partnership Dba Verizon Wireless - Il - 312350 )Area Code 312-351 - (Southwestern Bell Mobile Systems, Llc - Il - 312351 )Area Code 312-353 - (Ameritech Illinois - 312353 )Area Code 312-355 - (Ameritech Illinois - 312355 )Area Code 312-356 - (Ameritech Illinois - 312356 )Area Code 312-357 - (Ameritech Illinois - 312357 )Area Code 312-358 - (Source One Wireless - 312358 )Area Code 312-359 - (Arch Wireless Holdings, Inc. - 312359 )Area Code 312-360 - (Ameritech Illinois - 312360 )Area Code 312-361 - (Ameritech Illinois - 312361 )Area Code 312-362 - (Ameritech Illinois - 312362 )Area Code 312-363 - (Rcn Telecom Services Of Illinois, Inc. - Il - 312363 )Area Code 312-364 - (Ameritech Illinois - 312364 )Area Code 312-365 - (Arch Wireless Holdings, Inc. - 312365 )Area Code 312-368 - (Ameritech Illinois - 312368 )Area Code 312-369 - (Southwestern Bell Mobile Systems, Llc - Il - 312369 )Area Code 312-370 - (Heartland Communications, Inc. - 312370 )Area Code 312-371 - (Sprint Spectrum L.p. - 312371 )Area Code 312-372 - (Ameritech Illinois - 312372 )Area Code 312-373 - (Focal Communications Corp Of Illinois - 312373 )Area Code 312-374 - (Ameritech Illinois - 312374 )Area Code 312-375 - (T-mobile Usa, Inc. - 312375 )Area Code 312-377 - (Xo Illinois, Inc. - 312377 )Area Code 312-378 - (Weblink Wireless, Inc. - 312378 )Area Code 312-379 - (Ovation Communications Of Illinois, Inc. - 312379 )Area Code 312-380 - (Ameritech Illinois - 312380 )Area Code 312-381 - (Ameritech Illinois - 312381 )Area Code 312-382 - (Ameritech Illinois - 312382 )Area Code 312-383 - (Metrocall - 312383 )Area Code 312-384 - (Ameritech Illinois - 312384 )Area Code 312-385 - (Ameritech Illinois - 312385 )Area Code 312-386 - (Ameritech Illinois - 312386 )Area Code 312-387 - (Arch Wireless Holdings, Inc. - 312387 )Area Code 312-388 - (United States Cellular Corp. - 312388 )Area Code 312-389 - (Arch Wireless Holdings, Inc. - 312389 )Area Code 312-390 - (Ameritech Mobile Services, Inc. - 312390 )Area Code 312-391 - (Southwestern Bell Mobile Systems, Llc - Il - 312391 )Area Code 312-393 - (Airtouch Paging - Illinois - 312393 )Area Code 312-394 - (Ameritech Illinois - 312394 )Area Code 312-395 - (At&t Local - 312395 )Area Code 312-396 - (Ameritech Illinois - 312396 )Area Code 312-397 - (Ameritech Illinois - 312397 )Area Code 312-398 - (Metrocall - 312398 )Area Code 312-399 - (Sprint Spectrum L.p. - 312399 )Area Code 312-400 - (Ameritech Mobile Services, Inc. - 312400 )Area Code 312-401 - (Southwestern Bell Mobile Systems, Llc - Il - 312401 )Area Code 312-402 - (Southwestern Bell Mobile Systems, Llc - Il - 312402 )Area Code 312-404 - (T-mobile Usa, Inc. - 312404 )Area Code 312-405 - (Cellco Partnership Dba Verizon Wireless - Il - 312405 )Area Code 312-407 - (Ameritech Illinois - 312407 )Area Code 312-408 - (Ameritech Illinois - 312408 )Area Code 312-409 - (Ameritech Illinois - 312409 )Area Code 312-410 - (Ameritech Illinois - 312410 )Area Code 312-413 - (Ameritech Illinois - 312413 )Area Code 312-415 - (Cellco Partnership Dba Verizon Wireless - Il - 312415 )Area Code 312-416 - (Mci Worldcom Communications, Inc. - Il - 312416 )Area Code 312-417 - (Ameritech Illinois - 312417 )Area Code 312-418 - (Arch Wireless Holdings, Inc. - 312418 )Area Code 312-419 - (Ameritech Illinois - 312419 )Area Code 312-420 - (At&t Wireless Services, Inc. - 312420 )Area Code 312-421 - (Ameritech Illinois - 312421 )Area Code 312-422 - (Ameritech Illinois - 312422 )Area Code 312-423 - (Focal Communications Corp Of Illinois - 312423 )Area Code 312-424 - (Ameritech Illinois - 312424 )Area Code 312-425 - (Ameritech Illinois - 312425 )Area Code 312-426 - (Metrocall - 312426 )Area Code 312-427 - (Ameritech Illinois - 312427 )Area Code 312-428 - (Southwestern Bell Mobile Systems, Llc - Il - 312428 )Area Code 312-429 - (Global Crossing Local Services, Inc.-il - 312429 )Area Code 312-431 - (Ameritech Illinois - 312431 )Area Code 312-432 - (Ameritech Illinois - 312432 )Area Code 312-433 - (Ameritech Illinois - 312433 )Area Code 312-435 - (Ameritech Illinois - 312435 )Area Code 312-436 - (Ameritech Illinois - 312436 )Area Code 312-437 - (United States Cellular Corp. - 312437 )Area Code 312-438 - (Source One Wireless - 312438 )Area Code 312-439 - (Arch Wireless Holdings, Inc. - 312439 )Area Code 312-440 - (Ameritech Illinois - 312440 )Area Code 312-441 - (Ameritech Illinois - 312441 )Area Code 312-442 - (Ameritech Illinois - 312442 )Area Code 312-443 - (Ameritech Illinois - 312443 )Area Code 312-444 - (Ameritech Illinois - 312444 )Area Code 312-445 - (Corecomm Illinois, Inc. - Il - 312445 )Area Code 312-446 - (Nextel Communications - 312446 )Area Code 312-447 - (Ameritech Illinois - 312447 )Area Code 312-448 - (Arch Wireless Holdings, Inc. - 312448 )Area Code 312-449 - (Airtouch Paging - Illinois - 312449 )Area Code 312-450 - (Southwestern Bell Mobile Systems, Llc - Il - 312450 )Area Code 312-451 - (At&t Local - 312451 )Area Code 312-452 - (Ameritech Mobile Services, Inc. - 312452 )Area Code 312-453 - (Mci Worldcom Communications, Inc. - Il - 312453 )Area Code 312-454 - (Ameritech Illinois - 312454 )Area Code 312-455 - (Ameritech Illinois - 312455 )Area Code 312-456 - (Ameritech Illinois - 312456 )Area Code 312-457 - (Airtouch Paging - Illinois - 312457 )Area Code 312-458 - (Ameritech Illinois - 312458 )Area Code 312-459 - (Map Mobile Communications, Inc. - 312459 )Area Code 312-460 - (Ameritech Illinois - 312460 )Area Code 312-461 - (Ameritech Illinois - 312461 )Area Code 312-462 - (Ameritech Illinois - 312462 )Area Code 312-463 - (Ameritech Illinois - 312463 )Area Code 312-464 - (Ameritech Illinois - 312464 )Area Code 312-465 - ( - 312465 )Area Code 312-466 - ( - 312466 )Area Code 312-467 - ( - 312467 )Area Code 312-469 - ( - 312469 )Area Code 312-470 - ( - 312470 )Area Code 312-474 - ( - 312474 )Area Code 312-475 - ( - 312475 )Area Code 312-476 - ( - 312476 )Area Code 312-478 - ( - 312478 )Area Code 312-479 - ( - 312479 )Area Code 312-480 - (Southwestern Bell Mobile Systems, Llc - Il - 312480 )Area Code 312-482 - (Ameritech Illinois - 312482 )Area Code 312-484 - (Arch Wireless Holdings, Inc. - 312484 )Area Code 312-485 - (Cellco Partnership Dba Verizon Wireless - Il - 312485 )Area Code 312-489 - (Cellco Partnership Dba Verizon Wireless - Il - 312489 )Area Code 312-490 - (Arch Wireless Holdings, Inc. - 312490 )Area Code 312-491 - (Ameritech Illinois - 312491 )Area Code 312-492 - (Ameritech Illinois - 312492 )Area Code 312-493 - (T-mobile Usa, Inc. - 312493 )Area Code 312-494 - (Ameritech Illinois - 312494 )Area Code 312-495 - (Arch Wireless Holdings, Inc. - 312495 )Area Code 312-496 - (Ameritech Illinois - 312496 )Area Code 312-497 - (Cellco Partnership Dba Verizon Wireless - Il - 312497 )Area Code 312-498 - (Sprint Spectrum L.p. - 312498 )Area Code 312-499 - (Ameritech Illinois - 312499 )Area Code 312-502 - (Cellco Partnership Dba Verizon Wireless - Il - 312502 )Area Code 312-503 - (Focal Communications Corp Of Illinois - 312503 )Area Code 312-504 - (Southwestern Bell Mobile Systems, Llc - Il - 312504 )Area Code 312-505 - (Cellco Partnership Dba Verizon Wireless - Il - 312505 )Area Code 312-507 - (Ameritech Illinois - 312507 )Area Code 312-512 - (Arch Wireless Holdings, Inc. - 312512 )Area Code 312-513 - (Southwestern Bell Mobile Systems, Llc - Il - 312513 )Area Code 312-514 - (Ameritech Mobile Services, Inc. - 312514 )Area Code 312-515 - (Cellco Partnership Dba Verizon Wireless - Il - 312515 )Area Code 312-516 - (Ameritech Illinois - 312516 )Area Code 312-519 - (Cellco Partnership Dba Verizon Wireless - Il - 312519 )Area Code 312-520 - (Cellco Partnership Dba Verizon Wireless - Il - 312520 )Area Code 312-521 - (At&t Local - 312521 )Area Code 312-523 - (Sprint Spectrum L.p. - 312523 )Area Code 312-525 - (Mcimetro, Ats, Inc. - 312525 )Area Code 312-526 - (Ameritech Illinois - 312526 )Area Code 312-527 - (Ameritech Illinois - 312527 )Area Code 312-528 - (Ameritech Illinois - 312528 )Area Code 312-529 - (At&t Local - 312529 )Area Code 312-530 - (Weblink Wireless, Inc. - 312530 )Area Code 312-532 - (Southwestern Bell Mobile Systems, Llc - Il - 312532 )Area Code 312-533 - (Cellco Partnership Dba Verizon Wireless - Il - 312533 )Area Code 312-537 - (Ameritech Illinois - 312537 )Area Code 312-540 - (Ameritech Illinois - 312540 )Area Code 312-541 - (Ameritech Illinois - 312541 )Area Code 312-542 - (Ameritech Illinois - 312542 )Area Code 312-543 - (At&t Wireless Services, Inc. - 312543 )Area Code 312-544 - (Ameritech Illinois - 312544 )Area Code 312-545 - (Sprint Spectrum L.p. - 312545 )Area Code 312-546 - (Level 3 Communications, Llc - Il - 312546 )Area Code 312-547 - (Southwestern Bell Mobile Systems, Llc - Il - 312547 )Area Code 312-550 - (Cellco Partnership Dba Verizon Wireless - Il - 312550 )Area Code 312-551 - (Ameritech Illinois - 312551 )Area Code 312-552 - (Ameritech Illinois - 312552 )Area Code 312-553 - (Ameritech Illinois - 312553 )Area Code 312-554 - (Ameritech Illinois - 312554 )Area Code 312-556 - (Ameritech Illinois - 312556 )Area Code 312-557 - (Ameritech Illinois - 312557 )Area Code 312-558 - (Ameritech Illinois - 312558 )Area Code 312-559 - (Ameritech Illinois - 312559 )Area Code 312-560 - (At&t Wireless Services, Inc. - 312560 )Area Code 312-562 - (Weblink Wireless, Inc. - 312562 )Area Code 312-563 - (Ameritech Illinois - 312563 )Area Code 312-565 - (Ameritech Illinois - 312565 )Area Code 312-566 - (Ameritech Illinois - 312566 )Area Code 312-567 - (Ameritech Illinois - 312567 )Area Code 312-568 - (Ameritech Illinois - 312568 )Area Code 312-569 - (Ameritech Illinois - 312569 )Area Code 312-570 - (Ameritech Illinois - 312570 )Area Code 312-571 - (Arch Wireless Holdings, Inc. - 312571 )Area Code 312-572 - (Ameritech Illinois - 312572 )Area Code 312-573 - (Ameritech Illinois - 312573 )Area Code 312-574 - (Ameritech Illinois - 312574 )Area Code 312-575 - (Ameritech Illinois - 312575 )Area Code 312-576 - (Southwestern Bell Mobile Systems, Llc - Il - 312576 )Area Code 312-577 - (Mci Worldcom Communications, Inc. - Il - 312577 )Area Code 312-578 - (Ameritech Illinois - 312578 )Area Code 312-580 - (Ameritech Illinois - 312580 )Area Code 312-582 - (Ameritech Illinois - 312582 )Area Code 312-583 - (Ameritech Illinois - 312583 )Area Code 312-587 - (Ameritech Illinois - 312587 )Area Code 312-588 - (Ameritech Illinois - 312588 )Area Code 312-589 - (Ameritech Illinois - 312589 )Area Code 312-590 - (Cellco Partnership Dba Verizon Wireless - Il - 312590 )Area Code 312-591 - (Ameritech Illinois - 312591 )Area Code 312-592 - (Ameritech Illinois - 312592 )Area Code 312-593 - (T-mobile Usa, Inc. - 312593 )Area Code 312-595 - (Ameritech Illinois - 312595 )Area Code 312-596 - (Teleport Communications Group - Chicago - 312596 )Area Code 312-597 - (Source One Wireless - 312597 )Area Code 312-599 - (Weblink Wireless, Inc. - 312599 )Area Code 312-601 - (Mcimetro, Ats, Inc. - 312601 )Area Code 312-602 - (Focal Communications Corp Of Illinois - 312602 )Area Code 312-603 - (Ameritech Illinois - 312603 )Area Code 312-604 - (Xo Illinois, Inc. - 312604 )Area Code 312-605 - (Arch Wireless Holdings, Inc. - 312605 )Area Code 312-606 - (Ameritech Illinois - 312606 )Area Code 312-607 - (Southwestern Bell Mobile Systems, Llc - Il - 312607 )Area Code 312-608 - (Southwestern Bell Mobile Systems, Llc - Il - 312608 )Area Code 312-609 - (Ameritech Illinois - 312609 )Area Code 312-610 - (Heartland Communications, Inc. - 312610 )Area Code 312-612 - (Ameritech Illinois - 312612 )Area Code 312-613 - (Southwestern Bell Mobile Systems, Llc - Il - 312613 )Area Code 312-614 - (Metrocall - 312614 )Area Code 312-616 - (Ameritech Illinois - 312616 )Area Code 312-617 - (Nextel Communications - 312617 )Area Code 312-618 - (Southwestern Bell Mobile Systems, Llc - Il - 312618 )Area Code 312-619 - (Cellular Paging Usa, Inc. - 312619 )Area Code 312-621 - (Ameritech Illinois - 312621 )Area Code 312-622 - (At&t Wireless Services, Inc. - 312622 )Area Code 312-623 - (Southwestern Bell Mobile Systems, Llc - Il - 312623 )Area Code 312-624 - (Rcn Telecom Services Of Illinois, Inc. - Il - 312624 )Area Code 312-625 - (Global Naps, Inc. - Il - 312625 )Area Code 312-627 - (Ameritech Illinois - 312627 )Area Code 312-628 - (Xo Illinois, Inc. - 312628 )Area Code 312-629 - (Ameritech Illinois - 312629 )Area Code 312-630 - (Ameritech Illinois - 312630 )Area Code 312-632 - (Ameritech Illinois - 312632 )Area Code 312-633 - (Ameritech Illinois - 312633 )Area Code 312-634 - (Ameritech Illinois - 312634 )Area Code 312-635 - (Global Crossing Local Services, Inc.-il - 312635 )Area Code 312-636 - (Cellco Partnership Dba Verizon Wireless - Il - 312636 )Area Code 312-637 - (Focal Communications Corp Of Illinois - 312637 )Area Code 312-638 - (Focal Communications Corp Of Illinois - 312638 )Area Code 312-639 - (Arch Wireless Holdings, Inc. - 312639 )Area Code 312-640 - (Ameritech Illinois - 312640 )Area Code 312-641 - (Ameritech Illinois - 312641 )Area Code 312-642 - (Ameritech Illinois - 312642 )Area Code 312-643 - (Rcn Telecom Services Of Illinois, Inc. - Il - 312643 )Area Code 312-644 - (Ameritech Illinois - 312644 )Area Code 312-645 - (Ameritech Illinois - 312645 )Area Code 312-647 - (Arch Wireless Holdings, Inc. - 312647 )Area Code 312-648 - (Ameritech Illinois - 312648 )Area Code 312-649 - (Ameritech Illinois - 312649 )Area Code 312-650 - (Rcn Telecom Services Of Illinois, Inc. - Il - 312650 )Area Code 312-651 - (Ameritech Illinois - 312651 )Area Code 312-652 - (Ameritech Illinois - 312652 )Area Code 312-653 - (Ameritech Illinois - 312653 )Area Code 312-654 - (Ameritech Illinois - 312654 )Area Code 312-655 - (Ameritech Illinois - 312655 )Area Code 312-656 - (Nextel Communications - 312656 )Area Code 312-657 - (Arch Wireless Holdings, Inc. - 312657 )Area Code 312-658 - (Ameritech Illinois - 312658 )Area Code 312-659 - (Southwestern Bell Mobile Systems, Llc - Il - 312659 )Area Code 312-660 - (Teleport Communications Group - Chicago - 312660 )Area Code 312-661 - (Ameritech Illinois - 312661 )Area Code 312-662 - (Ameritech Illinois - 312662 )Area Code 312-663 - (Ameritech Illinois - 312663 )Area Code 312-664 - (Ameritech Illinois - 312664 )Area Code 312-665 - (Teleport Communications Group - Chicago - 312665 )Area Code 312-666 - (Ameritech Illinois - 312666 )Area Code 312-669 - (Ameritech Illinois - 312669 )Area Code 312-670 - (Ameritech Illinois - 312670 )Area Code 312-671 - (United States Cellular Corp. - 312671 )Area Code 312-672 - (Ameritech Illinois - 312672 )Area Code 312-673 - (Winstar Communications, Llc - Il - 312673 )Area Code 312-674 - (Ameritech Illinois - 312674 )Area Code 312-675 - (Ameritech Illinois - 312675 )Area Code 312-677 - (Arch Wireless Holdings, Inc. - 312677 )Area Code 312-678 - (Heartland Communications, Inc. - 312678 )Area Code 312-679 - (Airtouch Paging - Illinois - 312679 )Area Code 312-680 - (Arch Wireless Holdings, Inc. - 312680 )Area Code 312-681 - (Ameritech Illinois - 312681 )Area Code 312-682 - (Arch Wireless Holdings, Inc. - 312682 )Area Code 312-683 - (Ameritech Illinois - 312683 )Area Code 312-685 - (United States Cellular Corp. - 312685 )Area Code 312-688 - (Metrocall - 312688 )Area Code 312-689 - (Ameritech Mobile Services, Inc. - 312689 )Area Code 312-690 - (Source One Wireless - 312690 )Area Code 312-691 - (Beepermart, Inc. - 312691 )Area Code 312-692 - (Ameritech Illinois - 312692 )Area Code 312-693 - (Ameritech Illinois - 312693 )Area Code 312-694 - (Ameritech Illinois - 312694 )Area Code 312-695 - (Ameritech Illinois - 312695 )Area Code 312-696 - (Ameritech Illinois - 312696 )Area Code 312-697 - (Ameritech Illinois - 312697 )Area Code 312-698 - (Focal Communications Corp Of Illinois - 312698 )Area Code 312-701 - (Ameritech Illinois - 312701 )Area Code 312-703 - (Ameritech Illinois - 312703 )Area Code 312-704 - (Ameritech Illinois - 312704 )Area Code 312-705 - (Teleport Communications Group - Chicago - 312705 )Area Code 312-706 - (Teleport Communications Group - Chicago - 312706 )Area Code 312-707 - (Ameritech Illinois - 312707 )Area Code 312-709 - (Source One Wireless - 312709 )Area Code 312-710 - (Ameritech Illinois - 312710 )Area Code 312-712 - (Ameritech Illinois - 312712 )Area Code 312-713 - (Ameritech Mobile Services, Inc. - 312713 )Area Code 312-714 - (Ameritech Illinois - 312714 )Area Code 312-715 - (Ameritech Illinois - 312715 )Area Code 312-716 - (Ameritech Illinois - 312716 )Area Code 312-718 - (Cellco Partnership Dba Verizon Wireless - Il - 312718 )Area Code 312-719 - (United States Cellular Corp. - 312719 )Area Code 312-720 - (Cellco Partnership Dba Verizon Wireless - Il - 312720 )Area Code 312-724 - (Heartland Communications, Inc. - 312724 )Area Code 312-726 - (Ameritech Illinois - 312726 )Area Code 312-727 - (Ameritech Illinois - 312727 )Area Code 312-729 - (Ameritech Illinois - 312729 )Area Code 312-730 - (At&t Local - 312730 )Area Code 312-731 - (At&t Local - 312731 )Area Code 312-732 - (Ameritech Illinois - 312732 )Area Code 312-733 - (Ameritech Illinois - 312733 )Area Code 312-735 - (Nextel Communications - 312735 )Area Code 312-737 - (Ameritech Illinois - 312737 )Area Code 312-738 - (Ameritech Illinois - 312738 )Area Code 312-739 - (Ameritech Illinois - 312739 )Area Code 312-740 - (Ameritech Mobile Services, Inc. - 312740 )Area Code 312-742 - (Ameritech Illinois - 312742 )Area Code 312-743 - (Ameritech Illinois - 312743 )Area Code 312-744 - (Ameritech Illinois - 312744 )Area Code 312-745 - (Ameritech Illinois - 312745 )Area Code 312-746 - (Ameritech Illinois - 312746 )Area Code 312-747 - (Ameritech Illinois - 312747 )Area Code 312-748 - (Arch Wireless Holdings, Inc. - 312748 )Area Code 312-750 - (Ameritech Illinois - 312750 )Area Code 312-751 - (Ameritech Illinois - 312751 )Area Code 312-752 - (Focal Communications Corp Of Illinois - 312752 )Area Code 312-753 - (Rcn Telecom Services Of Illinois, Inc. - Il - 312753 )Area Code 312-755 - (Ameritech Illinois - 312755 )Area Code 312-756 - (Ameritech Illinois - 312756 )Area Code 312-758 - (Cellco Partnership Dba Verizon Wireless - Il - 312758 )Area Code 312-759 - (Ameritech Illinois - 312759 )Area Code 312-760 - (Ameritech Mobile Services, Inc. - 312760 )Area Code 312-762 - (Ameritech Illinois - 312762 )Area Code 312-765 - (Ameritech Illinois - 312765 )Area Code 312-766 - (Source One Wireless - 312766 )Area Code 312-768 - (At&t Local - 312768 )Area Code 312-769 - (Beepermart, Inc. - 312769 )Area Code 312-770 - (Ameritech Illinois - 312770 )Area Code 312-771 - (Cellco Partnership Dba Verizon Wireless - Il - 312771 )Area Code 312-775 - (Ameritech Illinois - 312775 )Area Code 312-777 - (Teleport Communications Group - Chicago - 312777 )Area Code 312-780 - (Mci Worldcom Communications, Inc. - Il - 312780 )Area Code 312-781 - (Ameritech Illinois - 312781 )Area Code 312-782 - (Ameritech Illinois - 312782 )Area Code 312-786 - (Ameritech Illinois - 312786 )Area Code 312-787 - (Ameritech Illinois - 312787 )Area Code 312-788 - (Ameritech Illinois - 312788 )Area Code 312-789 - (Ameritech Illinois - 312789 )Area Code 312-790 - (Ameritech Illinois - 312790 )Area Code 312-791 - (Ameritech Illinois - 312791 )Area Code 312-793 - (Ameritech Illinois - 312793 )Area Code 312-794 - (Rcn Telecom Services Of Illinois, Inc. - Il - 312794 )Area Code 312-795 - (Ameritech Illinois - 312795 )Area Code 312-796 - (Ameritech Illinois - 312796 )Area Code 312-797 - (Ameritech Illinois - 312797 )Area Code 312-798 - (Ameritech Illinois - 312798 )Area Code 312-799 - (Ameritech Illinois - 312799 )Area Code 312-801 - (Source One Wireless - 312801 )Area Code 312-802 - (Cellco Partnership Dba Verizon Wireless - Il - 312802 )Area Code 312-803 - (Mci Worldcom Communications, Inc. - Il - 312803 )Area Code 312-804 - (T-mobile Usa, Inc. - 312804 )Area Code 312-805 - (Cellco Partnership Dba Verizon Wireless - Il - 312805 )Area Code 312-806 - (Southwestern Bell Mobile Systems, Llc - Il - 312806 )Area Code 312-807 - (Ameritech Illinois - 312807 )Area Code 312-808 - (Ameritech Illinois - 312808 )Area Code 312-810 - (Southwestern Bell Mobile Systems, Llc - Il - 312810 )Area Code 312-812 - (Ameritech Illinois - 312812 )Area Code 312-813 - (Southwestern Bell Mobile Systems, Llc - Il - 312813 )Area Code 312-814 - (Ameritech Illinois - 312814 )Area Code 312-817 - (Ameritech Illinois - 312817 )Area Code 312-818 - (Source One Wireless - 312818 )Area Code 312-819 - (Ameritech Illinois - 312819 )Area Code 312-820 - (Arch Wireless Holdings, Inc. - 312820 )Area Code 312-821 - (Mci Worldcom Communications, Inc. - Il - 312821 )Area Code 312-822 - (Ameritech Illinois - 312822 )Area Code 312-823 - (Ameritech Illinois - 312823 )Area Code 312-824 - (Heartland Communications, Inc. - 312824 )Area Code 312-825 - (Heartland Communications, Inc. - 312825 )Area Code 312-826 - (Heartland Communications, Inc. - 312826 )Area Code 312-827 - (Ameritech Illinois - 312827 )Area Code 312-828 - (Ameritech Illinois - 312828 )Area Code 312-829 - (Ameritech Illinois - 312829 )Area Code 312-830 - (Arch Wireless Holdings, Inc. - 312830 )Area Code 312-831 - (Ameritech Illinois - 312831 )Area Code 312-832 - (Ameritech Illinois - 312832 )Area Code 312-833 - (Cellco Partnership Dba Verizon Wireless - Il - 312833 )Area Code 312-834 - (Ameritech Illinois - 312834 )Area Code 312-835 - (Cellco Partnership Dba Verizon Wireless - Il - 312835 )Area Code 312-836 - (Ameritech Illinois - 312836 )Area Code 312-837 - (Arch Wireless Holdings, Inc. - 312837 )Area Code 312-838 - (Map Mobile Communications, Inc. - 312838 )Area Code 312-839 - (Ameritech Mobile Services, Inc. - 312839 )Area Code 312-840 - (Ameritech Illinois - 312840 )Area Code 312-841 - (Southwestern Bell Mobile Systems, Llc - Il - 312841 )Area Code 312-842 - (Ameritech Illinois - 312842 )Area Code 312-845 - (Ameritech Illinois - 312845 )Area Code 312-846 - (Ameritech Illinois - 312846 )Area Code 312-848 - (Cellco Partnership Dba Verizon Wireless - Il - 312848 )Area Code 312-849 - (Ameritech Illinois - 312849 )Area Code 312-850 - (Ameritech Illinois - 312850 )Area Code 312-851 - (Heartland Communications, Inc. - 312851 )Area Code 312-852 - (Southwestern Bell Mobile Systems, Llc - Il - 312852 )Area Code 312-853 - (Ameritech Illinois - 312853 )Area Code 312-854 - (Rcn Telecom Services Of Illinois, Inc. - Il - 312854 )Area Code 312-855 - (Ameritech Illinois - 312855 )Area Code 312-856 - (Ameritech Illinois - 312856 )Area Code 312-857 - (Ameritech Illinois - 312857 )Area Code 312-859 - (Cellco Partnership Dba Verizon Wireless - Il - 312859 )Area Code 312-860 - (Southwestern Bell Mobile Systems, Llc - Il - 312860 )Area Code 312-861 - (Ameritech Illinois - 312861 )Area Code 312-863 - (Ovation Communications Of Illinois, Inc. - 312863 )Area Code 312-864 - (Ameritech Illinois - 312864 )Area Code 312-867 - (Ameritech Illinois - 312867 )Area Code 312-869 - (Ameritech Illinois - 312869 )Area Code 312-870 - (Winstar Communications, Llc - Il - 312870 )Area Code 312-873 - (Mci Worldcom Communications, Inc. - Il - 312873 )Area Code 312-875 - (Ameritech Illinois - 312875 )Area Code 312-876 - (Ameritech Illinois - 312876 )Area Code 312-877 - (Source One Wireless - 312877 )Area Code 312-879 - (Ameritech Illinois - 312879 )Area Code 312-880 - (Ameritech Illinois - 312880 )Area Code 312-881 - (Ovation Communications Of Illinois, Inc. - 312881 )Area Code 312-882 - (Cellco Partnership Dba Verizon Wireless - Il - 312882 )Area Code 312-884 - (Ovation Communications Of Illinois, Inc. - 312884 )Area Code 312-886 - (Ameritech Illinois - 312886 )Area Code 312-887 - (Ameritech Illinois - 312887 )Area Code 312-890 - (Sprint Spectrum L.p. - 312890 )Area Code 312-891 - (Arch Wireless Holdings, Inc. - 312891 )Area Code 312-892 - (Focal Communications Corp Of Illinois - 312892 )Area Code 312-893 - (Focal Communications Corp Of Illinois - 312893 )Area Code 312-894 - (Mcimetro, Ats, Inc. - 312894 )Area Code 312-895 - (Focal Communications Corp Of Illinois - 312895 )Area Code 312-896 - (Focal Communications Corp Of Illinois - 312896 )Area Code 312-897 - (Source One Wireless - 312897 )Area Code 312-898 - (Cellco Partnership Dba Verizon Wireless - Il - 312898 )Area Code 312-899 - (Ameritech Illinois - 312899 )Area Code 312-901 - (Metrocall - 312901 )Area Code 312-902 - (Ameritech Illinois - 312902 )Area Code 312-903 - (Ameritech Mobile Services, Inc. - 312903 )Area Code 312-904 - (Ameritech Illinois - 312904 )Area Code 312-905 - (Ameritech Illinois - 312905 )Area Code 312-906 - (Ameritech Illinois - 312906 )Area Code 312-907 - (Nextel Communications - 312907 )Area Code 312-908 - (Ameritech Illinois - 312908 )Area Code 312-909 - (Cellco Partnership Dba Verizon Wireless - Il - 312909 )Area Code 312-910 - (Weblink Wireless, Inc. - 312910 )Area Code 312-912 - (Ameritech Illinois - 312912 )Area Code 312-913 - (Ameritech Illinois - 312913 )Area Code 312-914 - (Cellco Partnership Dba Verizon Wireless - Il - 312914 )Area Code 312-915 - (Ameritech Illinois - 312915 )Area Code 312-916 - (Airtouch Paging - Illinois - 312916 )Area Code 312-917 - (Ameritech Illinois - 312917 )Area Code 312-919 - (Cellco Partnership Dba Verizon Wireless - Il - 312919 )Area Code 312-920 - (Ameritech Illinois - 312920 )Area Code 312-922 - (Ameritech Illinois - 312922 )Area Code 312-923 - (Ameritech Illinois - 312923 )Area Code 312-924 - (Paetec Communications, Inc. - Il - 312924 )Area Code 312-925 - (At&t Wireless Services, Inc. - 312925 )Area Code 312-926 - (Ameritech Illinois - 312926 )Area Code 312-927 - (T-mobile Usa, Inc. - 312927 )Area Code 312-928 - (Ameritech Illinois - 312928 )Area Code 312-930 - (Ameritech Illinois - 312930 )Area Code 312-931 - (Ameritech Illinois - 312931 )Area Code 312-932 - (Ameritech Illinois - 312932 )Area Code 312-933 - (Sprint Spectrum L.p. - 312933 )Area Code 312-935 - (Ameritech Illinois - 312935 )Area Code 312-936 - (Ameritech Illinois - 312936 )Area Code 312-937 - (Arch Wireless Holdings, Inc. - 312937 )Area Code 312-938 - (Ameritech Illinois - 312938 )Area Code 312-939 - (Ameritech Illinois - 312939 )Area Code 312-940 - (Arch Wireless Holdings, Inc. - 312940 )Area Code 312-941 - (Arch Wireless Holdings, Inc. - 312941 )Area Code 312-942 - (Ameritech Illinois - 312942 )Area Code 312-943 - (Ameritech Illinois - 312943 )Area Code 312-944 - (Ameritech Illinois - 312944 )Area Code 312-945 - (Ameritech Illinois - 312945 )Area Code 312-946 - (Ameritech Illinois - 312946 )Area Code 312-948 - (Ovation Communications Of Illinois, Inc. - 312948 )Area Code 312-949 - (Ameritech Illinois - 312949 )Area Code 312-951 - (Ameritech Illinois - 312951 )Area Code 312-952 - (At&t Wireless Services, Inc. - 312952 )Area Code 312-953 - (At&t Wireless Services, Inc. - 312953 )Area Code 312-954 - (Ameritech Illinois - 312954 )Area Code 312-955 - (Rcn Telecom Services Of Illinois, Inc. - Il - 312955 )Area Code 312-957 - (Ameritech Illinois - 312957 )Area Code 312-960 - (Ameritech Illinois - 312960 )Area Code 312-961 - (At&t Wireless Services, Inc. - 312961 )Area Code 312-962 - (Global Crossing Local Services, Inc.-il - 312962 )Area Code 312-963 - (Heartland Communications, Inc. - 312963 )Area Code 312-964 - (Weblink Wireless, Inc. - 312964 )Area Code 312-965 - (Cellco Partnership Dba Verizon Wireless - Il - 312965 )Area Code 312-970 - (Ameritech Illinois - 312970 )Area Code 312-971 - (Geotek Communications, Inc. - 312971 )Area Code 312-972 - (Southwestern Bell Mobile Systems, Llc - Il - 312972 )Area Code 312-974 - (Ameritech Illinois - 312974 )Area Code 312-975 - (Map Mobile Communications, Inc. - 312975 )Area Code 312-977 - (Ameritech Illinois - 312977 )Area Code 312-979 - (Ameritech Illinois - 312979 )Area Code 312-980 - (Teleport Communications Group - Chicago - 312980 )Area Code 312-981 - (Ovation Communications Of Illinois, Inc. - 312981 )Area Code 312-982 - (Arch Wireless Holdings, Inc. - 312982 )Area Code 312-983 - (Ameritech Illinois - 312983 )Area Code 312-984 - (Ameritech Illinois - 312984 )Area Code 312-985 - (Ovation Communications Of Illinois, Inc. - 312985 )Area Code 312-986 - (Ameritech Illinois - 312986 )Area Code 312-987 - (Ameritech Illinois - 312987 )Area Code 312-988 - (Ameritech Illinois - 312988 )Area Code 312-992 - (Ameritech Illinois - 312992 )Area Code 312-993 - (Ameritech Illinois - 312993 )Area Code 312-994 - (Ovation Communications Of Illinois, Inc. - 312994 )Area Code 312-995 - (Mcleodusa Telecommunications Services, Inc.- Il - 312995 )Area Code 312-996 - (Ameritech Illinois - 312996 )Area Code 312-997 - (Ameritech Illinois - 312997 )Area Code 312-998 - (Multi Computer Systems, Inc. - 312998 )
ROSELLE
Area Code 312-231 - (Southwestern Bell Mobile Systems, Llc - Il - 312231 )Area Code 312-354 - (Southwestern Bell Mobile Systems, Llc - Il - 312354 )

Other Information about area code 312 in Illinois

  • State Information Resources for Illinois (Source: State Information)
  • CitySites Pages for Illinois (Source: Official CitySites)
  • Wikipedia Article on Area Code 312 (Source: Wikipedia)