ILLINOIS BELL TEL CO
157 prefixes in 815 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 815-206 | WOODSTOCK | 9329 | — | Yes |
| 815-220 | LA SALLE | 9329 | — | Yes |
| 815-223 | LA SALLE | 9329 | — | — |
| 815-224 | LA SALLE | 9329 | — | — |
| 815-226 | ROCKFORD | 9329 | — | — |
| 815-227 | ROCKFORD | 9329 | — | Yes |
| 815-229 | ROCKFORD | 9329 | — | — |
| 815-231 | ROCKFORD | 9329 | — | Yes |
| 815-237 | GARDNER | 9329 | — | Yes |
| 815-254 | PLAINFIELD | 9329 | — | — |
| 815-265 | GILMAN | 9329 | — | Yes |
| 815-268 | ONARGA | 9329 | — | Yes |
| 815-282 | ROCKFORD | 9329 | — | — |
| 815-287 | VERONA | 9329 | — | Yes |
| 815-293 | LOCKPORT | 9329 | — | Yes |
| 815-300 | NEW LENOX | 9329 | 2010-12-22 | Yes |
| 815-334 | WOODSTOCK | 9329 | — | Yes |
| 815-337 | WOODSTOCK | 9329 | — | — |
| 815-338 | WOODSTOCK | 9329 | — | — |
| 815-344 | MCHENRY | 9329 | — | — |
| 815-356 | CRYSTAL LK | 9329 | — | — |
| 815-357 | SENECA | 9329 | — | Yes |
| 815-363 | MCHENRY | 9329 | — | — |
| 815-372 | LOCKPORT | 9329 | — | Yes |
| 815-381 | ROCKFORD | 9329 | — | — |
| 815-385 | MCHENRY | 9329 | — | — |
| 815-387 | ROCKFORD | 9329 | — | — |
| 815-389 | SO BELOIT | 9329 | — | — |
| 815-391 | ROCKFORD | 9329 | — | Yes |
| 815-394 | ROCKFORD | 9329 | — | Yes |
| 815-395 | ROCKFORD | 9329 | — | — |
| 815-397 | ROCKFORD | 9329 | — | — |
| 815-398 | ROCKFORD | 9329 | — | — |
| 815-399 | ROCKFORD | 9329 | — | — |
| 815-407 | LOCKPORT | 9329 | — | Yes |
| 815-415 | SENECA | 9329 | — | Yes |
| 815-416 | MORRIS | 9329 | — | Yes |
| 815-417 | BRAIDWOOD | 9329 | — | Yes |
| 815-421 | HERSCHER | 9329 | — | Yes |
| 815-422 | ST ANNE | 9329 | — | Yes |
| 815-423 | ELWOOD | 9329 | — | Yes |
| 815-424 | ELWOOD | 9329 | — | Yes |
| 815-426 | HERSCHER | 9329 | — | Yes |
| 815-427 | ST ANNE | 9329 | — | Yes |
| 815-431 | OTTAWA | 9329 | — | Yes |
| 815-432 | WATSEKA | 9329 | — | Yes |
| 815-433 | OTTAWA | 9329 | — | — |
| 815-434 | OTTAWA | 9329 | — | — |
| 815-436 | PLAINFIELD | 9329 | — | — |
| 815-439 | PLAINFIELD | 9329 | — | — |
| 815-444 | CRYSTAL LK | 9329 | — | — |
| 815-448 | MAZON | 9329 | — | Yes |
| 815-455 | CRYSTAL LK | 9329 | — | — |
| 815-458 | BRAIDWOOD | 9329 | — | Yes |
| 815-459 | CRYSTAL LK | 9329 | — | — |
| 815-462 | NEW LENOX | 9329 | — | — |
| 815-463 | NEW LENOX | 9329 | — | Yes |
| 815-464 | FRANKFORT | 9329 | — | — |
| 815-465 | GRANT PARK | 9329 | — | Yes |
| 815-466 | GRANT PARK | 9329 | — | Yes |
| 815-467 | MINOOKA | 9329 | — | — |
| 815-468 | MANTENO | 9329 | — | Yes |
| 815-469 | FRANKFORT | 9329 | — | — |
| 815-470 | ROCKFORD | 9329 | — | — |
| 815-472 | MOMENCE | 9329 | — | Yes |
| 815-475 | PLATTVILLE | 9329 | — | Yes |
| 815-476 | WILMINGTON | 9329 | — | Yes |
| 815-477 | CRYSTAL LK | 9329 | — | — |
| 815-478 | MANHATTAN | 9329 | — | Yes |
| 815-479 | CRYSTAL LK | 9329 | — | Yes |
| 815-484 | ROCKFORD | 9329 | — | Yes |
| 815-485 | NEW LENOX | 9329 | — | — |
| 815-489 | ROCKFORD | 9329 | — | Yes |
| 815-490 | ROCKFORD | 9329 | — | — |
| 815-521 | MINOOKA | 9329 | — | Yes |
| 815-535 | STERLING | 9329 | — | Yes |
| 815-548 | STERLING | 9329 | — | — |
| 815-552 | LOCKPORT | 9329 | 2001-04-10 | Yes |
| 815-564 | STERLING | 9329 | — | Yes |
| 815-568 | MARENGO | 9329 | — | Yes |
| 815-577 | PLAINFIELD | 9329 | — | — |
| 815-578 | MCHENRY | 9329 | — | — |
| 815-584 | DWIGHT | 9329 | — | Yes |
| 815-588 | LOCKPORT | 9329 | — | Yes |
| 815-609 | PLAINFIELD | 9329 | 2001-10-24 | — |
| 815-614 | KANKAKEE | 9329 | — | Yes |
| 815-622 | STERLING | 9329 | — | Yes |
| 815-625 | STERLING | 9329 | — | — |
| 815-626 | STERLING | 9329 | — | — |
| 815-631 | STERLING | 9329 | — | Yes |
| 815-632 | STERLING | 9329 | — | Yes |
| 815-633 | ROCKFORD | 9329 | — | — |
| 815-634 | COAL CITY | 9329 | — | Yes |
| 815-636 | ROCKFORD | 9329 | — | — |
| 815-637 | ROCKFORD | 9329 | — | — |
| 815-639 | ROCKFORD | 9329 | — | — |
| 815-654 | ROCKFORD | 9329 | — | — |
| 815-657 | FORREST | 9329 | — | Yes |
| 815-667 | UTICA | 9329 | — | Yes |
| 815-683 | CRESCENTCY | 9329 | — | 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.