NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| — | 760-216 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | VISTA | CA |
| — | 760-230 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | ENCINITAS | CA |
| — | 760-231 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | OCSD OCSD | CA |
| — | 760-237 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | OCSD PDTN | CA |
| — | 760-294 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | ESCONDIDO | CA |
| — | 760-295 | 0XXX6XXX7XXX8XXX9XXX which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | VISTA | CA |
| — | 760-297 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | VALLEY CTR | CA |
| — | 760-440 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | RAMONA | CA |
| — | 760-444 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | OCSD CRLS | CA |
| — | 760-487 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | ENCINITAS | CA |
| — | 760-637 | 0–9 XXXall 10 · 6 holders which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | OCSD OCSD | CA |
| — | 760-798 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SAN MARCOS | CA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.