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 |
|---|---|---|---|---|---|---|
| 2022-05-16 | 458-301 | 0XXX1XXX · 2 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | SELMA | OR |
| 2022-02-22 | 458-286 | 1XXX which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | O BRIEN | OR |
| 2020-08-11 | 458-592 | 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | CAVE JCT | OR |
| 2017-10-11 | 458-546 | 6XXX9XXX · 2 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | YACHATS | OR |
| 2017-10-11 | 458-562 | 2XXX7XXX9XXX · 3 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | WALDPORT | OR |
| 2017-10-11 | 458-868 | 5XXX6XXX8XXX9XXX · 4 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | SOUTHBEACH | OR |
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.