FRONTIER NORTH, INC. - IL
133 prefixes in 815 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 815-232 | FREEPORT | 1036 | — | — |
| 815-233 | FREEPORT | 1036 | — | — |
| 815-234 | BYRON | 1015 | — | Yes |
| 815-235 | FREEPORT | 1036 | — | — |
| 815-239 | PECATONICA | 1036 | — | Yes |
| 815-246 | EARLVILLE | 1015 | — | Yes |
| 815-247 | SEWARD | 1036 | — | Yes |
| 815-248 | DURAND | 1036 | — | Yes |
| 815-249 | GRANDRIDGE | 1015 | — | Yes |
| 815-264 | WATERMAN | 1036 | — | Yes |
| 815-266 | FREEPORT | 1036 | — | Yes |
| 815-286 | HINCKLEY | 1036 | — | Yes |
| 815-297 | FREEPORT | 1036 | — | Yes |
| 815-332 | CHERRY VLY | 1015 | — | Yes |
| 815-335 | WINNEBAGO | 1015 | — | Yes |
| 815-339 | GRANVILLE | 1036 | — | Yes |
| 815-362 | GERMAN VLY | 1036 | — | Yes |
| 815-365 | REDDICK | 1015 | — | Yes |
| 815-367 | WINSLOW | 1036 | — | Yes |
| 815-368 | LOSTANT | 1015 | — | Yes |
| 815-369 | LENA | 1036 | — | Yes |
| 815-376 | OHIO | 1015 | — | Yes |
| 815-379 | WALNUT | 1015 | — | Yes |
| 815-384 | CRESTON | 1036 | — | Yes |
| 815-393 | MONROE CTR | 1036 | — | Yes |
| 815-396 | STEWARD | 1036 | — | Yes |
| 815-406 | BYRON | 1015 | — | Yes |
| 815-428 | MARTINTON | 1015 | — | Yes |
| 815-429 | SHELDON | 1015 | — | Yes |
| 815-435 | BEAVERVL | 1015 | — | Yes |
| 815-437 | PUTNAM | 1036 | — | Yes |
| 815-443 | PEARL CITY | 1036 | — | Yes |
| 815-445 | MANLIUS | 1015 | — | Yes |
| 815-446 | CEDARPOINT | 1036 | — | Yes |
| 815-449 | DAKOTA | 1036 | — | Yes |
| 815-452 | TOLUCA | 1015 | — | Yes |
| 815-453 | ASHTON | 1036 | — | Yes |
| 815-454 | SHEFFIELD | 1015 | — | Yes |
| 815-456 | FRANKLIGRV | 1036 | — | Yes |
| 815-486 | DONOVAN | 1015 | — | Yes |
| 815-492 | APPLERIVER | 1036 | — | Yes |
| 815-495 | LELAND | 1015 | — | Yes |
| 815-496 | SHERIDAN | 1015 | — | Yes |
| 815-497 | COMPTON | 1015 | — | Yes |
| 815-498 | SOMONAUK | 1015 | — | Yes |
| 815-522 | KIRKLAND | 1036 | — | Yes |
| 815-538 | MENDOTA | 1015 | — | Yes |
| 815-539 | MENDOTA | 1015 | — | Yes |
| 815-544 | BELVIDERE | 1015 | — | — |
| 815-547 | BELVIDERE | 1015 | — | — |
| 815-561 | ROCHELLE | 1036 | — | Yes |
| 815-562 | ROCHELLE | 1036 | — | — |
| 815-563 | CEDARVILLE | 1036 | — | Yes |
| 815-567 | CAMPUS | 1015 | — | Yes |
| 815-569 | CAPRON | 1015 | — | Yes |
| 815-591 | HANOVER | 1036 | — | Yes |
| 815-594 | APPLERIVER | 1036 | — | Yes |
| 815-597 | GARDENPRRI | 1015 | — | Yes |
| 815-598 | MASSBACH | 1036 | — | Yes |
| 815-599 | FREEPORT | 1036 | — | Yes |
| 815-623 | ROSCOE | 1015 | — | Yes |
| 815-624 | ROCKTON | 1015 | — | Yes |
| 815-627 | PAW PAW | 1015 | — | Yes |
| 815-628 | W BROOKLYN | 1015 | — | Yes |
| 815-629 | SHIRLAND | 1015 | — | Yes |
| 815-635 | CHATSWORTH | 1015 | — | Yes |
| 815-638 | LA MOILLE | 1015 | — | Yes |
| 815-643 | DOVER | 1015 | — | Yes |
| 815-645 | STILMANVLY | 1015 | — | Yes |
| 815-646 | TISKILWA | 1015 | — | Yes |
| 815-648 | HEBRON | 1015 | — | Yes |
| 815-653 | WONDERLAKE | 1015 | — | Yes |
| 815-659 | BUREAU | 1015 | — | Yes |
| 815-663 | SPRING VLY | 1015 | — | Yes |
| 815-664 | SPRING VLY | 1015 | — | Yes |
| 815-672 | STREATOR | 1015 | — | — |
| 815-673 | STREATOR | 1015 | — | Yes |
| 815-675 | SPRING GRV | 1015 | — | Yes |
| 815-678 | RICHMOND | 1015 | — | Yes |
| 815-686 | PIPER CITY | 1015 | — | Yes |
| 815-688 | STRAWN | 1015 | — | Yes |
| 815-692 | FAIRBURY | 1015 | — | Yes |
| 815-694 | CLIFTON | 1015 | — | Yes |
| 815-697 | CHEBANSE | 1015 | — | Yes |
| 815-698 | ASHKUM | 1015 | — | Yes |
| 815-699 | WYANET | 1015 | — | Yes |
| 815-728 | WONDERLAKE | 1015 | — | Yes |
| 815-732 | OREGON | 1036 | — | Yes |
| 815-734 | MT MORRIS | 1036 | — | Yes |
| 815-745 | WARREN | 1036 | — | Yes |
| 815-748 | DE KALB | 1036 | — | — |
| 815-752 | DE KALB | 1036 | — | — |
| 815-753 | DE KALB | 1036 | — | — |
| 815-754 | DE KALB | 1036 | — | — |
| 815-756 | DE KALB | 1036 | — | Yes |
| 815-758 | DE KALB | 1036 | — | — |
| 815-765 | POPLAR GRV | 1015 | — | Yes |
| 815-784 | GENOA | 1036 | — | Yes |
| 815-786 | SANDWICH | 1015 | — | Yes |
| 815-787 | DE KALB | 1036 | — | — |
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.