Reference Data
Area Code Directory
Area Code 331 — Chicago, Elgin, Riverdale, Illinois

Area Code 331 — Chicago, Elgin, Riverdale, Illinois

Active

Data last updated: March 10, 2026

State
Illinois
Country
US
Timezone
America/Chicago
Assigned
July 6, 2007
Exchanges (NXX)
785
Carriers
25
Rate Centers
24
Overlay
Yes — 224, 630, 847

Top Carriers

Carrier OCN NXX Count
ONVOY, LLC 224C 38
T-MOBILE USA, INC. 6529 38
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 32
NEW CINGULAR WIRELESS PCS, LLC - IL 6534 25
FRACTEL, LLC 965H 18
BANDWIDTH.COM CLEC, LLC - IL 984E 11
TON80 COMMUNICATIONS, LLC 516J 9
METROPCS, INC. 5562 6
PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E 5
LEVEL 3 COMMUNICATIONS, LLC - IL 6115 5

Rate Centers

BARTLETT DOWNERSGRV ELMHURST AURORA NAPERVILLE YORKVILLE ST CHARLES OSWEGO LOMBARD WHEATON ITASCA SUGARGROVE W CHICAGO LEMONT GENEVA WARRENVL HINSDALE ELBURN BATAVIA BIG ROCK GLEN ELLYN PLANO ROSELLE KANEVILLE

Exchange Listings (NXX)

NPA-NXX Carrier Rate Center Type LATA Status
331-200 T-MOBILE USA, INC. BARTLETT Wireless 358 active
331-201 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL DOWNERSGRV Wireless 358 active
331-202 METROPCS, INC. ELMHURST Wireless 358 active
331-203 T-MOBILE USA, INC. AURORA Wireless 358 active
331-204 ONVOY, LLC NAPERVILLE Landline 358 active
331-205 T-MOBILE USA, INC. AURORA Wireless 358 active
331-206 T-MOBILE USA, INC. AURORA Wireless 358 active
331-207 LEVEL 3 COMMUNICATIONS, LLC - IL YORKVILLE Landline 358 active
331-208 T-MOBILE USA, INC. AURORA Wireless 358 active
331-209 LEVEL 3 COMMUNICATIONS, LLC - IL ELMHURST Landline 358 active
331-210 PEERLESS NETWORK OF ILLINOIS, LLC - IL ST CHARLES Landline 358 active
331-212 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL AURORA Landline 358 active
331-213 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL NAPERVILLE Wireless 358 active
331-214 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL DOWNERSGRV Wireless 358 active
331-215 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL NAPERVILLE Wireless 358 active
331-216 NEW CINGULAR WIRELESS PCS, LLC - IL OSWEGO Wireless 358 active
331-217 ONVOY, LLC LOMBARD Landline 358 active
331-218 T-MOBILE USA, INC. WHEATON Wireless 358 active
331-219 TELNYX LLC AURORA VoIP 358 active
331-220 T-MOBILE USA, INC. AURORA Wireless 358 active
331-221 ILLINOIS BELL TEL CO ELMHURST Landline 358 active
331-222 NEW CINGULAR WIRELESS PCS, LLC - IL ST CHARLES Wireless 358 active
331-223 NEW CINGULAR WIRELESS PCS, LLC - IL ST CHARLES Wireless 358 active
331-224 ONVOY, LLC ITASCA Landline 358 active
331-225 METROPCS, INC. ELMHURST Wireless 358 active
331-226 T-MOBILE USA, INC. NAPERVILLE Wireless 358 active
331-227 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL SUGARGROVE Wireless 358 active
331-228 PAETEC ITEL, LLC ST CHARLES VoIP 358 active
331-229 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL NAPERVILLE Wireless 358 active
331-230 T-MOBILE USA, INC. AURORA Wireless 358 active
331-231 NEW CINGULAR WIRELESS PCS, LLC - IL NAPERVILLE Wireless 358 active
331-232 NEW CINGULAR WIRELESS PCS, LLC - IL W CHICAGO Wireless 358 active
331-233 TELNYX LLC DOWNERSGRV VoIP 358 active
331-234 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL SUGARGROVE Wireless 358 active
331-235 NEW CINGULAR WIRELESS PCS, LLC - IL ST CHARLES Wireless 358 active
331-236 T-MOBILE USA, INC. WHEATON Wireless 358 active
331-237 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL NAPERVILLE Landline 358 active
331-238 TELEPORT COMMUNICATIONS AMERICA, LLC - IL DOWNERSGRV VoIP 358 active
331-239 ONVOY, LLC YORKVILLE Landline 358 active
331-240 PEERLESS NETWORK OF ILLINOIS, LLC - IL W CHICAGO Landline 358 active
331-241 ONVOY, LLC LOMBARD Landline 358 active
331-242 T-MOBILE USA, INC. LOMBARD Wireless 358 active
331-243 T-MOBILE USA, INC. LOMBARD Wireless 358 active
331-244 ONVOY, LLC NAPERVILLE Landline 358 active
331-245 T-MOBILE USA, INC. BARTLETT Wireless 358 active
331-246 T-MOBILE USA, INC. LEMONT Wireless 358 active
331-247 VONAGE AMERICA LLC NAPERVILLE VoIP 358 active
331-248 COMCAST IP PHONE, LLC GENEVA VoIP 358 active
331-249 ONVOY, LLC NAPERVILLE Landline 358 active
331-250 T-MOBILE USA, INC. AURORA Wireless 358 active
331-251 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL DOWNERSGRV Wireless 358 active
331-252 TELEPORT COMMUNICATIONS AMERICA, LLC - IL WARRENVL VoIP 358 active
331-253 T-MOBILE USA, INC. LEMONT Wireless 358 active
331-254 T-MOBILE USA, INC. SUGARGROVE Wireless 358 active
331-255 ONVOY, LLC AURORA Landline 358 active
331-256 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL AURORA Wireless 358 active
331-257 NEW CINGULAR WIRELESS PCS, LLC - IL AURORA Wireless 358 active
331-258 ONVOY, LLC AURORA Landline 358 active
331-259 PEERLESS NETWORK OF ILLINOIS, LLC - IL SUGARGROVE Landline 358 active
331-260 TELEPORT COMMUNICATIONS AMERICA, LLC - IL DOWNERSGRV VoIP 358 active
331-261 T-MOBILE USA, INC. LEMONT Wireless 358 active
331-262 T-MOBILE USA, INC. AURORA Wireless 358 active
331-263 ONVOY, LLC ITASCA Landline 358 active
331-264 LEVEL 3 COMMUNICATIONS, LLC - IL HINSDALE Landline 358 active
331-265 ONVOY, LLC GENEVA Landline 358 active
331-266 NEW CINGULAR WIRELESS PCS, LLC - IL ST CHARLES Wireless 358 active
331-267 VONAGE AMERICA LLC LOMBARD VoIP 358 active
331-268 T-MOBILE USA, INC. SUGARGROVE Wireless 358 active
331-269 T-MOBILE USA, INC. AURORA Wireless 358 active
331-270 ONVOY, LLC AURORA Landline 358 active
331-271 ONVOY, LLC HINSDALE Landline 358 active
331-272 ONVOY, LLC ST CHARLES Landline 358 active
331-273 ONVOY, LLC LEMONT Landline 358 active
331-274 T-MOBILE USA, INC. AURORA Wireless 358 active
331-275 T-MOBILE USA, INC. BARTLETT Wireless 358 active
331-276 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL ST CHARLES Wireless 358 active
331-277 NEW CINGULAR WIRELESS PCS, LLC - IL LOMBARD Wireless 358 active
331-278 NEW CINGULAR WIRELESS PCS, LLC - IL AURORA Wireless 358 active
331-279 PAETEC ITEL, LLC ELMHURST VoIP 358 active
331-280 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL DOWNERSGRV Wireless 358 active
331-281 ILLINOIS BELL TEL CO NAPERVILLE Landline 358 active
331-282 ONVOY, LLC HINSDALE Landline 358 active
331-283 T-MOBILE USA, INC. GENEVA Wireless 358 active
331-284 T-MOBILE USA, INC. BARTLETT Wireless 358 active
331-285 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL NAPERVILLE Wireless 358 active
331-286 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL ST CHARLES Wireless 358 active
331-287 BANDWIDTH.COM CLEC, LLC - IL AURORA VoIP 358 active
331-288 TON80 COMMUNICATIONS, LLC ELBURN VoIP 358 active
331-289 T-MOBILE USA, INC. HINSDALE Wireless 358 active
331-290 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL AURORA Wireless 358 active
331-291 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL DOWNERSGRV Wireless 358 active
331-292 ONVOY SPECTRUM, LLC DOWNERSGRV Wireless 358 active
331-293 NEW CINGULAR WIRELESS PCS, LLC - IL AURORA Wireless 358 active
331-294 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL NAPERVILLE Wireless 358 active
331-295 NUSO, LLC AURORA VoIP 358 active
331-296 BOOST SUBSCRIBERCO L.L.C. WHEATON Wireless 358 active
331-297 ONVOY, LLC BATAVIA Landline 358 active
331-298 ONVOY, LLC NAPERVILLE Landline 358 active
331-299 FRACTEL, LLC HINSDALE VoIP 358 active
331-300 T-MOBILE USA, INC. AURORA Wireless 358 active
331-301 METROPCS, INC. AURORA Wireless 358 active
331-302 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL AURORA Wireless 358 active
331-303 BANDWIDTH.COM CLEC, LLC - IL ELBURN VoIP 358 active
331-304 T-MOBILE USA, INC. BARTLETT Wireless 358 active
331-305 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL NAPERVILLE Wireless 358 active
331-306 ONVOY, LLC DOWNERSGRV Landline 358 active
331-307 T-MOBILE USA, INC. LOMBARD Wireless 358 active
331-308 BANDWIDTH.COM CLEC, LLC - IL BARTLETT VoIP 358 active
331-309 COMMIO, LLC LEMONT VoIP 358 active
331-310 BANDWIDTH.COM CLEC, LLC - IL BIG ROCK VoIP 358 active
331-312 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL AURORA Wireless 358 active
331-313 ONVOY SPECTRUM, LLC NAPERVILLE Wireless 358 active
331-314 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL ST CHARLES Wireless 358 active
331-315 NEW CINGULAR WIRELESS PCS, LLC - IL LOMBARD Wireless 358 active
331-316 COMMIO, LLC NAPERVILLE VoIP 358 active
331-317 COMMIO, LLC HINSDALE VoIP 358 active
331-318 BANDWIDTH.COM CLEC, LLC - IL LEMONT VoIP 358 active
331-319 ONVOY, LLC AURORA Landline 358 active
331-320 ONVOY, LLC BARTLETT Landline 358 active
331-321 T-MOBILE USA, INC. AURORA Wireless 358 active
331-322 ONVOY, LLC LOMBARD Landline 358 active
331-323 ONVOY, LLC GLEN ELLYN Landline 358 active
331-324 ONVOY, LLC YORKVILLE Landline 358 active
331-325 ONVOY SPECTRUM, LLC LEMONT Wireless 358 active
331-326 ONVOY, LLC DOWNERSGRV Landline 358 active
331-327 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL ST CHARLES Wireless 358 active
331-328 NEW CINGULAR WIRELESS PCS, LLC - IL NAPERVILLE Wireless 358 active
331-329 ONVOY, LLC AURORA Landline 358 active
331-330 NEW CINGULAR WIRELESS PCS, LLC - IL NAPERVILLE Wireless 358 active
331-331 ONVOY, LLC AURORA Landline 358 active
331-332 NEW CINGULAR WIRELESS PCS, LLC - IL NAPERVILLE Wireless 358 active
331-333 NEW CINGULAR WIRELESS PCS, LLC - IL NAPERVILLE Wireless 358 active
331-334 ONVOY, LLC BATAVIA Landline 358 active
331-335 NEW CINGULAR WIRELESS PCS, LLC - IL ST CHARLES Wireless 358 active
331-336 FRACTEL, LLC AURORA VoIP 358 active
331-337 NEW CINGULAR WIRELESS PCS, LLC - IL OSWEGO Wireless 358 active
331-338 ONVOY SPECTRUM, LLC AURORA Wireless 358 active
331-339 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL AURORA Wireless 358 active
331-340 ONVOY, LLC ITASCA Landline active
331-341 ONVOY, LLC PLANO Landline 358 active
331-342 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL NAPERVILLE Landline active
331-343 ONVOY, LLC DOWNERSGRV Landline 358 active
331-344 ONVOY, LLC W CHICAGO Landline active
331-345 FRACTEL, LLC NAPERVILLE VoIP 358 active
331-346 Landline active
331-347 Landline active
331-348 FRACTEL, LLC ELBURN VoIP 358 active
331-349 Landline active
331-350 Landline active
331-351 Landline active
331-352 Landline active
331-353 Landline active
331-354 Landline active
331-355 Landline active
331-356 FRACTEL, LLC BARTLETT VoIP 358 active
331-357 Landline active
331-358 Landline active
331-359 Landline active
331-360 Landline active
331-361 Landline active
331-362 Landline active
331-363 Landline active
331-364 Landline active
331-365 Landline active
331-366 Landline active
331-367 Landline active
331-368 Landline active
331-369 Landline active
331-370 Landline active
331-371 Landline active
331-372 Landline active
331-373 TON80 COMMUNICATIONS, LLC OSWEGO VoIP 358 active
331-374 Landline active
331-375 Landline active
331-376 Landline active
331-377 Landline active
331-378 Landline active
331-379 Landline active
331-380 Landline active
331-381 Landline active
331-382 Landline active
331-383 Landline active
331-384 Landline active
331-385 NEW CINGULAR WIRELESS PCS, LLC - IL AURORA Wireless 358 active
331-386 Landline active
331-387 Landline active
331-388 FRACTEL, LLC SUGARGROVE VoIP 358 active
331-389 Landline active
331-390 Landline active
331-391 Landline active
331-392 Landline active
331-393 Landline active
331-394 Landline active
331-395 Landline active
331-396 Landline active
331-397 Landline active
331-398 Landline active
331-399 FRACTEL, LLC DOWNERSGRV VoIP 358 active
331-400 FRACTEL, LLC OSWEGO VoIP 358 active
331-401 LEVEL 3 COMMUNICATIONS, LLC - IL NAPERVILLE Landline 358 active
331-402 Landline active
331-403 Landline active
331-404 Landline active
331-405 Landline active
331-406 Landline active
331-407 Landline active
331-408 Landline active
331-409 Landline active
331-410 Landline active
331-412 Landline active
331-413 Landline active
331-414 Landline active
331-415 Landline active
331-416 Landline active
331-417 Landline active
331-418 Landline active
331-419 Landline active
331-420 Landline active
331-421 Landline active
331-422 LEVEL 3 COMMUNICATIONS, LLC - IL ST CHARLES Landline 358 active
331-423 Landline active
331-424 Landline active
331-425 T-MOBILE USA, INC. AURORA Wireless 358 active
331-426 TON80 COMMUNICATIONS, LLC LEMONT VoIP 358 active
331-427 Landline active
331-428 Landline active
331-429 Landline active
331-430 Landline active
331-431 BANDWIDTH.COM CLEC, LLC - IL AURORA VoIP 358 active
331-432 Landline active
331-433 Landline active
331-434 Landline active
331-435 Landline active
331-436 Landline active
331-437 Landline active
331-438 Landline active
331-439 Landline active
331-440 Landline active
331-441 Landline active
331-442 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL ST CHARLES Wireless 358 active
331-443 Landline active
331-444 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL NAPERVILLE Wireless 358 active
331-445 Landline active
331-446 Landline active
331-447 Landline active
331-448 Landline active
331-449 Landline active
331-450 Landline active
331-451 Landline active
331-452 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL AURORA Wireless 358 active
331-453 Landline active
331-454 NEW CINGULAR WIRELESS PCS, LLC - IL AURORA Wireless 358 active
331-455 Landline active
331-456 FIRST COMMUNICATIONS, LLC ROSELLE VoIP 358 active
331-457 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL NAPERVILLE Wireless 358 active
331-458 Landline active
331-459 Landline active
331-460 Landline active
331-461 Landline active
331-462 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL LOMBARD Landline 358 active
331-463 Landline active
331-464 Landline active
331-465 NEW CINGULAR WIRELESS PCS, LLC - IL W CHICAGO Wireless 358 active
331-466 TON80 COMMUNICATIONS, LLC GLEN ELLYN VoIP 358 active
331-467 Landline active
331-468 Landline active
331-469 Landline active
331-470 Landline active
331-471 Landline active
331-472 T-MOBILE USA, INC. NAPERVILLE Wireless 358 active
331-473 Landline active
331-474 Landline active
331-475 Landline active
331-476 Landline active
331-477 Landline active
331-478 Landline active
331-479 Landline active
331-480 Landline active
331-481 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL DOWNERSGRV Wireless 358 active
331-482 Landline active
331-483 Landline active
331-484 Landline active
331-485 Landline active
331-486 Landline active
331-487 Landline active
331-488 Landline active
331-489 Landline active
331-490 Landline active
331-491 Landline active
331-492 Landline active
331-493 Landline active
331-494 Landline active
331-495 Landline active
331-496 Landline active
331-497 Landline active
331-498 Landline active
331-499 Landline active
331-500 FRACTEL, LLC GENEVA VoIP 358 active
331-501 Landline active
331-502 Landline active
331-503 Landline active
331-504 Landline active
331-505 Landline active
331-506 Landline active
331-507 Landline active
331-508 Landline active
331-509 Landline active
331-510 Landline active
331-512 Landline active
331-513 Landline active
331-514 Landline active
331-515 Landline active
331-516 Landline active
331-517 Landline active
331-518 Landline active
331-519 Landline active
331-520 Landline active
331-521 Landline active
331-522 Landline active
331-523 Landline active
331-524 Landline active
331-525 Landline active
331-526 Landline active
331-527 Landline active
331-528 Landline active
331-529 FRACTEL, LLC NAPERVILLE VoIP 358 active
331-530 Landline active
331-531 Landline active
331-532 Landline active
331-533 Landline active
331-534 Landline active
331-535 Landline active
331-536 Landline active
331-537 Landline active
331-538 Landline active
331-539 Landline active
331-540 Landline active
331-541 Landline active
331-542 Landline active
331-543 Landline active
331-544 Landline active
331-545 Landline active
331-546 Landline active
331-547 Landline active
331-548 Landline active
331-549 Landline active
331-550 Landline active
331-551 NEW CINGULAR WIRELESS PCS, LLC - IL LOMBARD Wireless 358 active
331-552 Landline active
331-553 Landline active
331-554 Landline active
331-556 Landline active
331-557 Landline active
331-558 Landline active
331-559 Landline active
331-560 Landline active
331-561 Landline active
331-562 Landline active
331-563 Landline active
331-564 Landline active
331-565 Landline active
331-566 Landline active
331-567 Landline active
331-568 Landline active
331-569 Landline active
331-570 Landline active
331-571 Landline active
331-572 Landline active
331-573 Landline active
331-574 Landline active
331-575 T-MOBILE USA, INC. AURORA Wireless 358 active
331-576 Landline active
331-577 Landline active
331-578 Landline active
331-579 Landline active
331-580 Landline active
331-581 Landline active
331-582 Landline active
331-583 Landline active
331-584 Landline active
331-585 Landline active
331-586 Landline active
331-587 Landline active
331-588 NEW CINGULAR WIRELESS PCS, LLC - IL ST CHARLES Wireless 358 active
331-589 Landline active
331-590 Landline active
331-592 Landline active
331-593 Landline active
331-594 Landline active
331-595 Landline active
331-596 Landline active
331-597 Landline active
331-598 Landline active
331-599 Landline active
331-600 FRACTEL, LLC WHEATON VoIP 358 active
331-601 Landline active
331-602 Landline active
331-603 Landline active
331-604 Landline active
331-605 Landline active
331-606 Landline active
331-607 Landline active
331-608 Landline active
331-609 Landline active
331-610 Landline active
331-612 Landline active
331-613 Landline active
331-614 Landline active
331-615 Landline active
331-616 Landline active
331-617 Landline active
331-618 Landline active
331-619 Landline active
331-620 Landline active
331-621 Landline active
331-622 Landline active
331-623 Landline active
331-624 Landline active
331-625 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL DOWNERSGRV Wireless 358 active
331-626 Landline active
331-627 TON80 COMMUNICATIONS, LLC LOMBARD VoIP 358 active
331-628 Landline active
331-629 Landline active
331-630 Landline active
331-631 ONVOY SPECTRUM, LLC DOWNERSGRV Wireless 358 active
331-632 Landline active
331-633 Landline active
331-634 Landline active
331-635 Landline active
331-636 Landline active
331-637 Landline active
331-638 Landline active
331-639 Landline active
331-640 Landline active
331-641 Landline active
331-642 BANDWIDTH.COM CLEC, LLC - IL ELMHURST VoIP 358 active
331-643 METROPCS, INC. AURORA Wireless 358 active
331-644 Landline active
331-645 METROPCS, INC. ELMHURST Wireless 358 active
331-646 Landline active
331-647 Landline active
331-648 Landline active
331-649 Landline active
331-650 Landline active
331-651 Landline active
331-652 Landline active
331-653 Landline active
331-654 Landline active
331-655 Landline active
331-656 Landline active
331-657 Landline active
331-658 Landline active
331-659 Landline active
331-660 Landline active
331-661 Landline active
331-662 Landline active
331-663 Landline active
331-664 Landline active
331-665 Landline active
331-666 ONVOY, LLC AURORA Landline 358 active
331-667 Landline active
331-668 Landline active
331-669 Landline active
331-670 Landline active
331-671 Landline active
331-672 Landline active
331-673 Landline active
331-674 Landline active
331-675 Landline active
331-676 Landline active
331-677 Landline active
331-678 Landline active
331-679 Landline active
331-680 Landline active
331-681 Landline active
331-682 Landline active
331-683 Landline active
331-684 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL AURORA Landline 358 active
331-685 Landline active
331-686 Landline active
331-687 Landline active
331-688 TON80 COMMUNICATIONS, LLC NAPERVILLE VoIP 358 active
331-689 Landline active
331-690 Landline active
331-691 Landline active
331-692 Landline active
331-693 Landline active
331-694 Landline active
331-695 Landline active
331-696 Landline active
331-697 Landline active
331-698 Landline active
331-699 Landline active
331-701 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL NAPERVILLE Wireless 358 active
331-702 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL NAPERVILLE Landline 358 active
331-703 T-MOBILE USA, INC. W CHICAGO Wireless 358 active
331-704 BANDWIDTH.COM CLEC, LLC - IL KANEVILLE VoIP 358 active
331-705 Landline active
331-706 Landline active
331-707 T-MOBILE USA, INC. AURORA Wireless 358 active
331-708 Landline active
331-709 Landline active
331-710 Landline active
331-712 Landline active
331-713 Landline active
331-714 Landline active
331-715 Landline active
331-716 ONVOY, LLC WHEATON Landline 358 active
331-717 NEW CINGULAR WIRELESS PCS, LLC - IL OSWEGO Wireless 358 active
331-718 Landline active
331-719 Landline active
331-720 Landline active
331-721 Landline active
331-722 Landline active
331-723 Landline active
331-724 Landline active
331-725 NEW CINGULAR WIRELESS PCS, LLC - IL OSWEGO Wireless 358 active
331-726 Landline active
331-727 Landline active
331-728 Landline active
331-729 Landline active
331-730 Landline active
331-731 Landline active
331-732 FRACTEL, LLC GENEVA VoIP 358 active
331-733 Landline active
331-734 Landline active
331-735 Landline active
331-736 Landline active
331-737 Landline active
331-738 Landline active
331-739 Landline active
331-740 Landline active
331-741 Landline active
331-742 Landline active
331-743 Landline active
331-744 Landline active
331-745 Landline active
331-746 TON80 COMMUNICATIONS, LLC KANEVILLE VoIP 358 active
331-747 Landline active
331-748 Landline active
331-749 Landline active
331-750 Landline active
331-751 Landline active
331-752 Landline active
331-753 Landline active
331-754 Landline active
331-755 Landline active
331-756 Landline active
331-757 T-MOBILE USA, INC. LEMONT Wireless 358 active
331-758 FRACTEL, LLC AURORA VoIP 358 active
331-759 Landline active
331-760 Landline active
331-761 Landline active
331-762 Landline active
331-763 Landline active
331-764 Landline active
331-765 Landline active
331-766 Landline active
331-767 Landline active
331-768 Landline active
331-769 Landline active
331-770 Landline active
331-771 ONVOY, LLC ST CHARLES Landline 358 active
331-772 Landline active
331-773 Landline active
331-774 Landline active
331-775 COMCAST IP PHONE, LLC DOWNERSGRV VoIP 358 active
331-776 Landline active
331-777 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL DOWNERSGRV Wireless 358 active
331-778 Landline active
331-779 Landline active
331-780 Landline active
331-781 Landline active
331-782 Landline active
331-783 Landline active
331-784 Landline active
331-785 Landline active
331-786 Landline active
331-787 Landline active
331-788 FRACTEL, LLC GENEVA VoIP 358 active
331-789 Landline active
331-790 Landline active
331-791 Landline active
331-792 Landline active
331-793 Landline active
331-794 Landline active
331-795 Landline active
331-796 Landline active
331-797 Landline active
331-798 Landline active
331-799 Landline active
331-800 ONVOY, LLC W CHICAGO Landline 358 active
331-801 TELEPORT COMMUNICATIONS AMERICA, LLC - IL DOWNERSGRV Landline 358 active
331-802 Landline active
331-803 PEERLESS NETWORK OF ILLINOIS, LLC - IL LEMONT Landline 358 active
331-804 Landline active
331-805 Landline active
331-806 COMCAST IP PHONE, LLC WHEATON VoIP 358 active
331-807 Landline active
331-808 BANDWIDTH.COM CLEC, LLC - IL PLANO VoIP 358 active
331-809 Landline active
331-810 Landline active
331-812 Landline active
331-813 Landline active
331-814 T-MOBILE USA, INC. NAPERVILLE Wireless 358 active
331-815 Landline active
331-816 Landline active
331-817 Landline active
331-818 Landline active
331-819 Landline active
331-820 Landline active
331-821 Landline active
331-822 Landline active
331-823 Landline active
331-824 Landline active
331-825 DIGITAL NETWORK ACCESS COMMUNICATIONS, INC. - IL GENEVA Landline active
331-826 METROPCS, INC. ELMHURST Wireless 358 active
331-827 Landline active
331-828 Landline active
331-829 Landline active
331-830 Landline active
331-831 Landline active
331-832 Landline active
331-833 Landline active
331-834 Landline active
331-835 Landline active
331-836 Landline active
331-837 TON80 COMMUNICATIONS, LLC W CHICAGO VoIP 358 active
331-838 Landline active
331-839 Landline active
331-840 Landline active
331-841 Landline active
331-842 Landline active
331-843 Landline active
331-844 Landline active
331-845 Landline active
331-846 Landline active
331-847 Landline active
331-848 Landline active
331-849 Landline active
331-850 ONVOY, LLC BIG ROCK Landline 358 active
331-851 Landline active
331-852 Landline active
331-853 Landline active
331-854 Landline active
331-855 Landline active
331-856 Landline active
331-857 Landline active
331-858 Landline active
331-859 Landline active
331-860 Landline active
331-861 Landline active
331-862 Landline active
331-863 Landline active
331-864 Landline active
331-865 Landline active
331-866 TON80 COMMUNICATIONS, LLC WHEATON VoIP 358 active
331-867 FRACTEL, LLC YORKVILLE VoIP 358 active
331-868 Landline active
331-869 Landline active
331-870 Landline active
331-871 ONVOY, LLC W CHICAGO Landline 358 active
331-872 Landline active
331-873 Landline active
331-874 Landline active
331-875 Landline active
331-876 Landline active
331-877 Landline active
331-878 Landline active
331-879 Landline active
331-880 Landline active
331-881 Landline active
331-882 Landline active
331-883 Landline active
331-884 Landline active
331-885 Landline active
331-886 Landline active
331-887 Landline active
331-888 PEERLESS NETWORK OF ILLINOIS, LLC - IL WARRENVL Landline 358 active
331-889 Landline active
331-890 Landline active
331-891 Landline active
331-892 Landline active
331-893 Landline active
331-894 Landline active
331-895 Landline active
331-896 Landline active
331-897 Landline active
331-898 Landline active
331-899 FRACTEL, LLC LOMBARD VoIP 358 active
331-900 FRACTEL, LLC ELMHURST VoIP 358 active
331-901 BANDWIDTH.COM CLEC, LLC - IL ST CHARLES VoIP 358 active
331-902 Landline active
331-903 AT&T ENTERPRISES, LLC DOWNERSGRV VoIP 358 active
331-904 Landline active
331-905 Landline active
331-906 Landline active
331-907 Landline active
331-908 Landline active
331-909 Landline active
331-910 Landline active
331-912 Landline active
331-913 Landline active
331-914 Landline active
331-915 Landline active
331-916 Landline active
331-917 Landline active
331-918 Landline active
331-919 Landline active
331-920 Landline active
331-921 Landline active
331-922 Landline active
331-923 Landline active
331-924 Landline active
331-925 Landline active
331-926 Landline active
331-927 Landline active
331-928 Landline active
331-929 Landline active
331-930 Landline active
331-931 Landline active
331-932 Landline active
331-933 Landline active
331-934 Landline active
331-935 Landline active
331-936 Landline active
331-937 Landline active
331-938 Landline active
331-939 Landline active
331-940 Landline active
331-941 Landline active
331-942 Landline active
331-943 Landline active
331-944 Landline active
331-945 Landline active
331-946 FRACTEL, LLC GLEN ELLYN VoIP 358 active
331-947 Landline active
331-948 Landline active
331-949 Landline active
331-951 Landline active
331-952 Landline active
331-953 Landline active
331-954 Landline active
331-955 Landline active
331-956 Landline active
331-957 Landline active
331-960 Landline active
331-961 Landline active
331-962 Landline active
331-963 Landline active
331-964 Landline active
331-965 Landline active
331-966 Landline active
331-967 Landline active
331-968 Landline active
331-969 Landline active
331-970 Landline active
331-971 Landline active
331-972 Landline active
331-973 Landline active
331-974 Landline active
331-975 Landline active
331-977 Landline active
331-978 Landline active
331-979 COMCAST IP PHONE, LLC ELMHURST VoIP 358 active
331-980 T-MOBILE USA, INC. AURORA Wireless 358 active
331-981 Landline active
331-982 Landline active
331-983 Landline active
331-984 Landline active
331-985 Landline active
331-986 Landline active
331-987 Landline active
331-988 Landline active
331-989 Landline active
331-990 Landline active
331-991 Landline active
331-992 Landline active
331-993 Landline active
331-994 Landline active
331-995 Landline active
331-996 Landline active
331-997 Landline active
331-998 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL DOWNERSGRV Wireless 358 active
331-999 BANDWIDTH.COM CLEC, LLC - IL OSWEGO VoIP 358 active

Area code 331 shares its geographic region with the following overlay area codes:

224 630 847