NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 207-392 | 0XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | OXFORD WEST TELEPHONE COMPANY | 3314 | ANDOVER | ME |
| — | 207-527 | 0XXX which blocks → | OXFORD WEST TELEPHONE COMPANY | 3314 | NO NORWAY | ME |
| — | 207-533 | 3XXX which blocks → | OXFORD WEST TELEPHONE COMPANY | 3314 | UPTON | ME |
| — | 207-545 | 5XXX8XXX · 2 holders which blocks → | OXFORD WEST TELEPHONE COMPANY | 3314 | ROXBURYPND | ME |
| — | 207-665 | 0XXX5XXX · 2 holders which blocks → | OXFORD WEST TELEPHONE COMPANY | 3314 | BRYANTPOND | ME |
| — | 207-824 | 1XXX which blocks → | OXFORD WEST TELEPHONE COMPANY | 3314 | BETHEL | ME |
| — | 207-836 | 0XXX which blocks → | OXFORD WEST TELEPHONE COMPANY | 3314 | WESTBETHEL | ME |
| — | 207-875 | 0XXX7XXX · 2 holders which blocks → | OXFORD WEST TELEPHONE COMPANY | 3314 | LOCKEMILLS | ME |
| — | 207-966 | 0XXX which blocks → | OXFORD WEST TELEPHONE COMPANY | 3314 | HEBRON | ME |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.