All assignees
800 prefixes in 815 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 815-500 | MARSEILLES | 593K | — | Yes |
| 815-501 | DE KALB | 5562 | — | Yes |
| 815-502 | WOODSTOCK | 460K | — | — |
| 815-503 | MENDOTA | 5562 | — | Yes |
| 815-504 | GARDNER | 460K | — | — |
| 815-505 | ROCKFORD | 6529 | — | — |
| 815-506 | UNION | 6115 | 2002-02-27 | Yes |
| 815-507 | MOMENCE | 6115 | 2001-12-28 | Yes |
| 815-508 | DE KALB | 6534 | 2004-06-16 | Yes |
| 815-509 | ROCKFORD | 6529 | — | Yes |
| 815-510 | STREATOR | 846F | 2010-01-08 | Yes |
| 815-511 | XXXXXXXXXX | MULT | — | — |
| 815-512 | LOCKPORT | 460K | — | — |
| 815-513 | MORRIS | 6115 | 2002-02-27 | Yes |
| 815-514 | JOLIET | 6529 | 2001-01-24 | Yes |
| 815-515 | WATSEKA | 6115 | 2002-02-04 | Yes |
| 815-516 | ROCKFORD | 6529 | 2001-01-24 | Yes |
| 815-517 | DE KALB | 7196 | 2004-06-28 | Yes |
| 815-518 | COAL CITY | 460K | 2001-10-23 | Yes |
| 815-519 | ROCKFORD | 6529 | — | Yes |
| 815-520 | ROCKFORD | 6333 | — | — |
| 815-521 | MINOOKA | 9329 | — | Yes |
| 815-522 | KIRKLAND | 1036 | — | Yes |
| 815-523 | KANKAKEE | 7136 | — | Yes |
| 815-524 | LOCKPORT | 7136 | — | Yes |
| 815-525 | SO BELOIT | 520K | — | — |
| 815-526 | CRYSTAL LK | 7136 | — | Yes |
| 815-527 | WOODSTOCK | 7136 | — | Yes |
| 815-528 | MCHENRY | 7136 | — | Yes |
| 815-529 | WOODSTOCK | 6333 | — | — |
| 815-530 | JOLIET | 6529 | — | Yes |
| 815-531 | JOLIET | 7136 | — | Yes |
| 815-532 | MORRIS | 6630 | — | — |
| 815-533 | LA GRANGE | 6795 | — | — |
| 815-534 | FRANKFORT | 6115 | — | Yes |
| 815-535 | STERLING | 9329 | — | Yes |
| 815-536 | LA GRANGE | 6630 | — | — |
| 815-537 | PROPHETSTN | 1183 | — | — |
| 815-538 | MENDOTA | 1015 | — | Yes |
| 815-539 | MENDOTA | 1015 | — | Yes |
| 815-540 | ROCKFORD | 6529 | — | Yes |
| 815-541 | FREEPORT | 6265 | — | Yes |
| 815-542 | THOMAS | 1183 | — | Yes |
| 815-543 | ROCKFORD | 6265 | — | Yes |
| 815-544 | BELVIDERE | 1015 | — | — |
| 815-545 | JOLIET | 6534 | — | — |
| 815-546 | JOLIET | 6534 | — | — |
| 815-547 | BELVIDERE | 1015 | — | — |
| 815-548 | STERLING | 9329 | — | — |
| 815-549 | KANKAKEE | 6529 | — | Yes |
| 815-550 | GRANT PARK | 6115 | — | Yes |
| 815-551 | LANARK | 224C | 2018-08-01 | Yes |
| 815-552 | LOCKPORT | 9329 | 2001-04-10 | Yes |
| 815-553 | JOLIET | 829J | 2001-04-10 | Yes |
| 815-554 | E DUBUQUE | 846F | — | Yes |
| 815-555 | DIR ASST | MULT | — | — |
| 815-556 | PLAINFIELD | 6115 | 2001-04-10 | Yes |
| 815-557 | JOLIET | 5562 | — | Yes |
| 815-558 | ROCKFORD | 6265 | — | Yes |
| 815-559 | CHENOA | 597F | — | Yes |
| 815-560 | HARVARD | 5562 | 2002-05-03 | Yes |
| 815-561 | ROCHELLE | 1036 | — | Yes |
| 815-562 | ROCHELLE | 1036 | — | — |
| 815-563 | CEDARVILLE | 1036 | — | Yes |
| 815-564 | STERLING | 9329 | — | Yes |
| 815-565 | SAVANNA | 846F | — | Yes |
| 815-566 | BELVIDERE | 6115 | 2002-06-21 | Yes |
| 815-567 | CAMPUS | 1015 | — | Yes |
| 815-568 | MARENGO | 9329 | — | Yes |
| 815-569 | CAPRON | 1015 | — | Yes |
| 815-570 | SANDWICH | 6115 | 2002-08-21 | Yes |
| 815-571 | SHANNON | 846F | 2006-04-21 | Yes |
| 815-572 | MARENGO | 6115 | — | Yes |
| 815-573 | KANKAKEE | 6115 | 2002-02-27 | Yes |
| 815-574 | HARMON | 443F | — | — |
| 815-575 | WOODSTOCK | 6534 | — | Yes |
| 815-576 | POLO | 443F | — | Yes |
| 815-577 | PLAINFIELD | 9329 | — | — |
| 815-578 | MCHENRY | 9329 | — | — |
| 815-579 | LA SALLE | 5562 | — | Yes |
| 815-580 | CHERRY VLY | 7421 | 2003-03-18 | Yes |
| 815-581 | SPRING GRV | 318J | 2005-10-06 | Yes |
| 815-582 | JOLIET | 6529 | 2005-10-06 | Yes |
| 815-583 | MORRISON | 443F | — | — |
| 815-584 | DWIGHT | 9329 | — | Yes |
| 815-585 | MORRIS | 6115 | 2002-05-03 | Yes |
| 815-586 | RANSOM | 1009 | — | — |
| 815-587 | OTTAWA | 6115 | 2002-04-02 | Yes |
| 815-588 | LOCKPORT | 9329 | — | Yes |
| 815-589 | FULTON | 1183 | — | — |
| 815-590 | STERLING | 6529 | 2003-07-14 | Yes |
| 815-591 | HANOVER | 1036 | — | Yes |
| 815-592 | KANKAKEE | 6333 | — | — |
| 815-593 | DE KALB | 6529 | — | Yes |
| 815-594 | APPLERIVER | 1036 | — | Yes |
| 815-595 | OREGON | 7421 | 2003-10-02 | Yes |
| 815-596 | MARENGO | 516C | 2006-02-10 | Yes |
| 815-597 | GARDENPRRI | 1015 | — | Yes |
| 815-598 | MASSBACH | 1036 | — | Yes |
| 815-599 | FREEPORT | 1036 | — | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.