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 |
|---|---|---|---|---|---|---|
| 2009-06-26 | 760-656 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | PALM SPG | CA |
| 2009-05-20 | 760-894 | 0–9 XXXall 10 · 7 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | DSERTHTSPG | CA |
| 2002-04-15 | 760-823 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | JULIAN | CA |
| 2002-02-22 | 760-239 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | RAMONA | CA |
| — | 760-208 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | VISTA | CA |
| — | 760-277 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | OCSD OCSD | CA |
| — | 760-456 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | ENCINITAS | CA |
| — | 760-465 | 3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | BORREGO | CA |
| — | 760-474 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | EL MIRAGE | CA |
| — | 760-475 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | VICTORVL | CA |
| — | 760-478 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | KERNVILLE | CA |
| — | 760-531 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | WELDON | CA |
| — | 760-571 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | SAN MARCOS | CA |
| — | 760-581 | 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | WRIGHTWOOD | CA |
| — | 760-707 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | OCSD CRLS | CA |
| — | 760-718 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | BARSTOW | CA |
| — | 760-755 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | ESCONDIDO | 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.