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 |
|---|---|---|---|---|---|---|
| 2018-03-23 | 707-919 | 0–9 XXXall 10 · 8 holders which blocks → | METROPCS, INC. | 5562 | SANTA ROSA | CA |
| 2017-09-20 | 707-209 | 0–9 XXXall 10 · 6 holders which blocks → | METROPCS, INC. | 5562 | VALLEJO | CA |
| 2012-12-26 | 707-230 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | SANTA ROSA | CA |
| 2011-02-21 | 707-273 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | EUREKA | CA |
| 2008-11-15 | 707-596 | 0–9 XXXall 10 · 6 holders which blocks → | METROPCS, INC. | 5562 | SANTA ROSA | CA |
| 2007-01-16 | 707-304 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | SANTA ROSA | CA |
| 2002-07-17 | 707-816 | 0XXX3XXX4XXX5XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | FRFLD-SUIS | CA |
| 2001-11-29 | 707-297 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | METROPCS, INC. | 5562 | BENICIA | CA |
| 2001-10-18 | 707-712 | 5XXX6XXX7XXX8XXX9XXX which blocks → | METROPCS, INC. | 5562 | VALLEJO | CA |
| 2001-09-19 | 707-704 | 0XXX5XXX which blocks → | METROPCS, INC. | 5562 | VALLEJO | CA |
| 2001-07-16 | 707-384 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | FRFLD-SUIS | CA |
| 2001-05-18 | 707-616 | 0XXX2XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | EUREKA | CA |
| — | 707-208 | none assigned yet which blocks → | METROPCS, INC. | 5562 | FRFLD-SUIS | CA |
| — | 707-235 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTA ROSA | CA |
| — | 707-280 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTA ROSA | CA |
| — | 707-310 | 8XXX which blocks → | METROPCS, INC. | 5562 | VALLEJO | CA |
| — | 707-332 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTA ROSA | CA |
| — | 707-333 | none assigned yet which blocks → | METROPCS, INC. | 5562 | VALLEJO | CA |
| — | 707-396 | 4XXX5XXX8XXX9XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | SANTA ROSA | CA |
| — | 707-580 | 2XXX8XXX9XXX which blocks → | METROPCS, INC. | 5562 | FRFLD-SUIS | CA |
| — | 707-628 | 0XXX1XXX2XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | VACAVILLE | CA |
| — | 707-656 | 0–9 XXXall 10 · 6 holders which blocks → | METROPCS, INC. | 5562 | VALLEJO | CA |
| — | 707-694 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTA ROSA | CA |
| — | 707-732 | 1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | METROPCS, INC. | 5562 | SONOMA | CA |
| — | 707-758 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTA ROSA | CA |
| — | 707-832 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | EUREKA | CA |
| — | 707-974 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTA ROSA | CA |
| — | 707-975 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTA ROSA | 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.