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 |
|---|---|---|---|---|---|---|
| 2022-04-11 | 209-906 | 0–9 XXXall 10 · 6 holders which blocks → | UTILITY TELECOM GROUP, LLC - CA | 9262 | MERCED | CA |
| 2021-02-02 | 209-860 | 0–9 XXXall 10 · 5 holders which blocks → | UTILITY TELECOM GROUP, LLC - CA | 9262 | MODESTO | CA |
| 2016-03-09 | 209-945 | 0–9 XXXwhole prefix which blocks → | UTILITY TELECOM GROUP, LLC - CA | 9262 | STOCKTON | CA |
| 2015-05-14 | 209-497 | 0–9 XXXall 10 · 6 holders which blocks → | UTILITY TELECOM GROUP, LLC - CA | 9262 | MODESTO | CA |
| 2015-04-01 | 209-452 | 0–9 XXXall 10 · 7 holders which blocks → | UTILITY TELECOM GROUP, LLC - CA | 9262 | LODI | CA |
| 2015-03-02 | 209-949 | 0–9 XXXall 10 · 4 holders which blocks → | UTILITY TELECOM GROUP, LLC - CA | 9262 | STOCKTON | CA |
| 2004-09-03 | 209-888 | 0–9 XXXall 10 · 7 holders which blocks → | UTILITY TELECOM GROUP, LLC - CA | 9262 | STOCKTON | CA |
| — | 209-249 | 6XXX7XXX9XXX · 2 holders which blocks → | UTILITY TELECOM GROUP, LLC - CA | 9262 | MANTECA | CA |
| — | 209-633 | 8XXX9XXX · 2 holders which blocks → | UTILITY TELECOM GROUP, LLC - CA | 9262 | TURLOCK | CA |
| — | 209-762 | 0XXX2XXX3XXX7XXX · 2 holders which blocks → | UTILITY TELECOM GROUP, LLC - CA | 9262 | STOCKTON | CA |
| — | 209-870 | 9XXX which blocks → | UTILITY TELECOM GROUP, LLC - CA | 9262 | STOCKTON | CA |
| — | 209-940 | 5XXX8XXX9XXX · 3 holders which blocks → | UTILITY TELECOM GROUP, LLC - CA | 9262 | STOCKTON | CA |
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.