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 |
|---|---|---|---|---|---|---|
| 2016-09-20 | 814-522 | 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 6 holders which blocks → | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | LINCOLNVL | PA |
| 2016-07-08 | 814-250 | 0–9 XXXall 10 · 6 holders which blocks → | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | EDINBORO | PA |
| 2007-04-24 | 814-908 | 0XXX2XXX4XXX · 3 holders which blocks → | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | CLINTONVL | PA |
| 2007-04-10 | 814-714 | not yet reported which blocks → | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | SOMERSET | PA |
| 2007-04-10 | 814-775 | not yet reported which blocks → | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | TITUSVILLE | PA |
| 2007-03-30 | 814-638 | 0XXX1XXX6XXX9XXX · 4 holders which blocks → | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | COCHRANTON | PA |
| 2007-03-29 | 814-213 | not yet reported which blocks → | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | CONNEAUTLK | PA |
| 2007-03-29 | 814-783 | not yet reported which blocks → | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | SAEGERTOWN | PA |
| 2007-03-26 | 814-645 | not yet reported which blocks → | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | GUYS MILLS | PA |
| 2007-03-26 | 814-785 | not yet reported which blocks → | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | TOWNVILLE | PA |
| 2007-03-26 | 814-818 | not yet reported which blocks → | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | LINESVILLE | PA |
| 2007-02-20 | 814-807 | 0–9 XXXall 10 · 5 holders which blocks → | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | MEADVILLE | PA |
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.