NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| 2013-09-18 | 207-307 | 0–9 XXXall 10 · 6 holders which blocks → | OXFORD CNTY TELEPHONE SVC CO, DBA OXFORD NETWRKS | 5205 | BANGOR | ME |
| 2013-08-23 | 207-303 | 0–9 XXXall 10 · 5 holders which blocks → | OXFORD CNTY TELEPHONE SVC CO, DBA OXFORD NETWRKS | 5205 | SCARBOROGH | ME |
| 2011-09-15 | 207-254 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → | OXFORD CNTY TELEPHONE SVC CO, DBA OXFORD NETWRKS | 5205 | HOULTON | ME |
| 2010-04-22 | 207-922 | 0–9 XXXall 10 · 8 holders which blocks → | OXFORD CNTY TELEPHONE SVC CO, DBA OXFORD NETWRKS | 5205 | BANGOR | ME |
| 2007-12-10 | 207-605 | 0–9 XXXall 10 · 7 holders which blocks → | OXFORD CNTY TELEPHONE SVC CO, DBA OXFORD NETWRKS | 5205 | HERMON | ME |
| 2007-02-28 | 207-513 | 0–9 XXXall 10 · 7 holders which blocks → | OXFORD CNTY TELEPHONE SVC CO, DBA OXFORD NETWRKS | 5205 | LEWISTON | ME |
| 2006-08-22 | 207-907 | 0–9 XXXall 10 · 6 holders which blocks → | OXFORD CNTY TELEPHONE SVC CO, DBA OXFORD NETWRKS | 5205 | BANGOR | ME |
| 2003-08-07 | 207-333 | 0–9 XXXall 10 · 4 holders which blocks → | OXFORD CNTY TELEPHONE SVC CO, DBA OXFORD NETWRKS | 5205 | LEWISTON | ME |
| 2001-05-10 | 207-739 | 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | OXFORD CNTY TELEPHONE SVC CO, DBA OXFORD NETWRKS | 5205 | NORWAY | ME |
| — | 207-440 | 0–9 XXXall 10 · 5 holders which blocks → | OXFORD CNTY TELEPHONE SVC CO, DBA OXFORD NETWRKS | 5205 | LEWISTON | ME |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.