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 |
|---|---|---|---|---|---|---|
| 2023-09-01 | 582-249 | 0XXX1XXX2XXX3XXX4XXX which blocks → | COMMIO, LLC | 939H | CARROLLTN | PA |
| 2023-09-01 | 582-250 | 0XXX1XXX2XXX3XXX4XXX which blocks → | COMMIO, LLC | 939H | DAVIDSVL | PA |
| 2023-09-01 | 582-251 | 0XXX1XXX2XXX3XXX4XXX which blocks → | COMMIO, LLC | 939H | ELDRED | PA |
| 2023-09-01 | 582-253 | 0XXX1XXX2XXX3XXX4XXX which blocks → | COMMIO, LLC | 939H | GALETON | PA |
| 2023-03-14 | 582-820 | 0XXX7XXX9XXX · 2 holders which blocks → | COMMIO, LLC | 939H | HUNTINGDON | PA |
| 2022-11-15 | 582-206 | 0–9 XXXall 10 · 6 holders which blocks → | COMMIO, LLC | 939H | EDINBORO | PA |
| 2022-11-15 | 582-225 | 0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → | COMMIO, LLC | 939H | TITUSVILLE | PA |
| 2022-11-04 | 582-224 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | COMMIO, LLC | 939H | WINDBER | PA |
| 2022-11-04 | 582-227 | 0–9 XXXall 10 · 5 holders which blocks → | COMMIO, LLC | 939H | GIRARD | PA |
| 2021-12-29 | 582-867 | 0XXX1XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → | COMMIO, LLC | 939H | ERIE | 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.