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 |
|---|---|---|---|---|---|---|
| — | 760-765 | 5XXX6XXX7XXX8XXX · 3 holders which blocks → | PACIFIC BELL | 9740 | JULIAN | CA |
| — | 760-767 | 6XXX8XXX · 2 holders which blocks → | PACIFIC BELL | 9740 | BORREGO | CA |
| — | 760-768 | not yet reported which blocks → | PACIFIC BELL | 9740 | CALEXICO | CA |
| — | 760-781 | none assigned yet which blocks → | PACIFIC BELL | 9740 | ESCONDIDO | CA |
| — | 760-782 | 2XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | PACIFIC BELL | 9740 | WARNER SPG | CA |
| — | 760-786 | 0XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | PACIFIC BELL | 9740 | DEATH VLY | CA |
| — | 760-787 | 6XXX which blocks → | PACIFIC BELL | 9740 | RAMONA | CA |
| — | 760-788 | not yet reported which blocks → | PACIFIC BELL | 9740 | RAMONA | CA |
| — | 760-789 | not yet reported which blocks → | PACIFIC BELL | 9740 | RAMONA | CA |
| — | 760-796 | not yet reported which blocks → | PACIFIC BELL | 9740 | ESCONDIDO | CA |
| — | 760-804 | not yet reported which blocks → | PACIFIC BELL | 9740 | OCSD CRLS | CA |
| — | 760-806 | not yet reported which blocks → | PACIFIC BELL | 9740 | VISTA | CA |
| — | 760-839 | not yet reported which blocks → | PACIFIC BELL | 9740 | ESCONDIDO | CA |
| — | 760-852 | 0XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | PACIFIC BELL | 9740 | SHOSHONE | CA |
| — | 760-856 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | PACIFIC BELL | 9740 | MT PASS | CA |
| — | 760-891 | 2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | PACIFIC BELL | 9740 | SAN MARCOS | CA |
| — | 760-901 | not yet reported which blocks → | PACIFIC BELL | 9740 | OCSD OCSD | CA |
| — | 760-918 | not yet reported which blocks → | PACIFIC BELL | 9740 | OCSD CRLS | CA |
| — | 760-929 | not yet reported which blocks → | PACIFIC BELL | 9740 | OCSD CRLS | CA |
| — | 760-930 | not yet reported which blocks → | PACIFIC BELL | 9740 | OCSD CRLS | CA |
| — | 760-931 | not yet reported which blocks → | PACIFIC BELL | 9740 | OCSD CRLS | CA |
| — | 760-940 | not yet reported which blocks → | PACIFIC BELL | 9740 | VISTA | CA |
| — | 760-941 | not yet reported which blocks → | PACIFIC BELL | 9740 | VISTA | CA |
| — | 760-942 | not yet reported which blocks → | PACIFIC BELL | 9740 | ENCINITAS | CA |
| — | 760-943 | 4XXX which blocks → | PACIFIC BELL | 9740 | ENCINITAS | CA |
| — | 760-944 | not yet reported which blocks → | PACIFIC BELL | 9740 | ENCINITAS | CA |
| — | 760-945 | not yet reported which blocks → | PACIFIC BELL | 9740 | VISTA | CA |
| — | 760-966 | not yet reported which blocks → | PACIFIC BELL | 9740 | OCSD OCSD | CA |
| — | 760-967 | not yet reported which blocks → | PACIFIC BELL | 9740 | OCSD OCSD | CA |
| — | 760-975 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PACIFIC BELL | 9740 | 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.