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 |
|---|---|---|---|---|---|---|
| 2024-03-12 | 970-861 | 0–9 XXXall 10 · 4 holders which blocks → | COMMIO, LLC | 939H | GREELEY | CO |
| 2024-03-12 | 970-863 | 0–9 XXXall 10 · 3 holders which blocks → | COMMIO, LLC | 939H | DURANGO | CO |
| 2024-03-12 | 970-869 | 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → | COMMIO, LLC | 939H | FORTMORGAN | CO |
| 2024-03-12 | 970-891 | 0XXX1XXX9XXX · 2 holders which blocks → | COMMIO, LLC | 939H | NEW CASTLE | CO |
| 2024-03-06 | 970-850 | 0XXX1XXX which blocks → | COMMIO, LLC | 939H | HAYDEN | CO |
| 2023-08-16 | 970-338 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → | COMMIO, LLC | 939H | EATON | CO |
| 2023-08-16 | 970-605 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → | COMMIO, LLC | 939H | WELDONA | CO |
| 2023-08-16 | 970-606 | 0–9 XXXall 10 · 2 holders which blocks → | COMMIO, LLC | 939H | STERLING | CO |
| 2023-08-16 | 970-607 | 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 3 holders which blocks → | COMMIO, LLC | 939H | OURAY | CO |
| 2023-08-16 | 970-860 | 0XXX1XXX2XXX3XXX4XXX which blocks → | COMMIO, LLC | 939H | PALISADE | CO |
| 2023-08-11 | 970-603 | 0XXX1XXX2XXX3XXX4XXX7XXX · 2 holders which blocks → | COMMIO, LLC | 939H | BASALT | CO |
| 2023-08-11 | 970-604 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → | COMMIO, LLC | 939H | BRUSH | CO |
| 2021-11-03 | 970-843 | 0XXX1XXX2XXX5XXX8XXX9XXX · 3 holders which blocks → | COMMIO, LLC | 939H | ALLISON | CO |
| 2021-09-29 | 970-806 | 0–9 XXXall 10 · 5 holders which blocks → | COMMIO, LLC | 939H | JOHNSTMLKN | CO |
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.