NumberResearchRecent prefix assignments
2 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 |
|---|---|---|---|---|---|---|
| — | 650-948 | not yet reported which blocks → | PACIFIC BELL | 9740 | LOS ALTOS | CA |
| — | 650-949 | not yet reported which blocks → | PACIFIC BELL | 9740 | LOS ALTOS | CA |
| — | 650-950 | not yet reported which blocks → | CA | |||
| — | 650-952 | not yet reported which blocks → | PACIFIC BELL | 9740 | SSNFRNCSCO | CA |
| — | 650-954 | 0XXX2XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | SAN MATEO | CA |
| — | 650-958 | not yet reported which blocks → | CA | |||
| — | 650-959 | not yet reported which blocks → | CA | |||
| — | 650-960 | 5XXX6XXX7XXX · 3 holders which blocks → | PACIFIC BELL | 9740 | MT VIEW | CA |
| — | 650-961 | not yet reported which blocks → | PACIFIC BELL | 9740 | MT VIEW | CA |
| — | 650-962 | 3XXX which blocks → | PACIFIC BELL | 9740 | MT VIEW | CA |
| — | 650-963 | 4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | ONVOY, LLC - CA | 649C | MT VIEW | CA |
| — | 650-964 | not yet reported which blocks → | PACIFIC BELL | 9740 | MT VIEW | CA |
| — | 650-965 | 5XXX which blocks → | PACIFIC BELL | 9740 | MT VIEW | CA |
| — | 650-966 | 4XXX5XXX6XXX7XXX · 2 holders which blocks → | PACIFIC BELL | 9740 | MT VIEW | CA |
| — | 650-967 | not yet reported which blocks → | PACIFIC BELL | 9740 | MT VIEW | CA |
| — | 650-968 | not yet reported which blocks → | PACIFIC BELL | 9740 | MT VIEW | CA |
| — | 650-969 | not yet reported which blocks → | PACIFIC BELL | 9740 | MT VIEW | CA |
| — | 650-976 | not yet reported which blocks → | CA | |||
| — | 650-980 | 4XXX7XXX8XXX9XXX which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | REDWOOD CY | CA |
| — | 650-984 | 0XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - CA | 649C | PACIFICA | CA |
| — | 650-985 | none assigned yet which blocks → | PACIFIC BELL | 9740 | SNFC JUNPR | CA |
| — | 650-988 | 5XXX which blocks → | PACIFIC BELL | 9740 | MT VIEW | CA |
| — | 650-989 | 1XXX5XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SSNFRNCSCO | CA |
| — | 650-991 | not yet reported which blocks → | PACIFIC BELL | 9740 | SNFC JUNPR | CA |
| — | 650-992 | not yet reported which blocks → | PACIFIC BELL | 9740 | SNFC JUNPR | CA |
| — | 650-993 | 1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PACIFIC BELL | 9740 | SNFC JUNPR | CA |
| — | 650-994 | not yet reported which blocks → | PACIFIC BELL | 9740 | SNFC JUNPR | CA |
| — | 650-996 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MT VIEW | CA |
| — | 650-997 | not yet reported which blocks → | PACIFIC BELL | 9740 | SNFC JUNPR | CA |
| — | 650-999 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - CA | 649C | PALO ALTO | 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.