LEVEL 3 COMMUNICATIONS, LLC - NH
37 prefixes in 603 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 603-259 | LITTLETON | 4017 | — | Yes |
| 603-280 | BARRINGTON | 4017 | — | Yes |
| 603-287 | CLAREMONT | 4017 | — | Yes |
| 603-294 | PORTSMOUTH | 4017 | — | Yes |
| 603-301 | CTROSSIPEE | 4017 | 2001-07-11 | Yes |
| 603-326 | BERLIN | 4017 | — | Yes |
| 603-331 | COLEBROOK | 4017 | — | Yes |
| 603-369 | CONCORD | 4017 | — | Yes |
| 603-379 | RYE BEACH | 4017 | — | Yes |
| 603-499 | KEENE | 4017 | — | Yes |
| 603-556 | LACONIA | 4017 | — | Yes |
| 603-565 | PENACOOK | 4017 | — | Yes |
| 603-567 | PETERBROGH | 4017 | — | Yes |
| 603-574 | ALSTEAD | 4017 | — | Yes |
| 603-576 | ORFORD | 4017 | — | Yes |
| 603-583 | EXETER | 4017 | — | Yes |
| 603-614 | WCHESTEFLD | 4017 | — | Yes |
| 603-618 | PIKE | 4017 | — | Yes |
| 603-678 | LEBANON | 4017 | — | Yes |
| 603-684 | LANCASTER | 4017 | — | Yes |
| 603-709 | PLAINFIELD | 4017 | 2004-08-17 | Yes |
| 603-725 | TAMWORTH | 4017 | — | Yes |
| 603-728 | NOWOODSTOK | 4017 | — | Yes |
| 603-733 | NO CONWAY | 4017 | — | Yes |
| 603-741 | NEW BOSTON | 4017 | — | Yes |
| 603-769 | MILFORD | 4017 | — | Yes |
| 603-780 | CANAAN | 4017 | — | Yes |
| 603-782 | MANCHESTER | 4017 | — | Yes |
| 603-819 | PLAISTOW | 4017 | — | Yes |
| 603-871 | SANBORNVL | 4017 | — | Yes |
| 603-873 | SUNAPEE | 4017 | — | Yes |
| 603-874 | MONROE | 4017 | — | Yes |
| 603-923 | ROCHESTER | 4017 | — | Yes |
| 603-951 | MILAN | 4017 | — | Yes |
| 603-952 | SALEM | 4017 | — | Yes |
| 603-967 | HAMPTON | 4017 | — | Yes |
| 603-992 | DANBURY | 4017 | — | 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.