NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026
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 |
|---|---|---|---|---|---|---|
| — | 818-405 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | LACRSCENTA | CA |
| — | 818-415 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | BRBN BRBN | CA |
| — | 818-430 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | VAN NUYS | CA |
| — | 818-470 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | SNFN SNFN | CA |
| — | 818-481 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | VAN NUYS | CA |
| — | 818-535 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | VAN NUYS | CA |
| — | 818-554 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | SNFN SNFN | CA |
| — | 818-573 | 0–9 XXXall 10 · 6 holders which blocks → | T-MOBILE USA, INC. | 6529 | SNFN PACM | CA |
| — | 818-612 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | VAN NUYS | CA |
| — | 818-613 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | LSAN DA 01 | CA |
| — | 818-652 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | VAN NUYS | CA |
| — | 818-665 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | AGOURA | CA |
| — | 818-670 | 0–9 XXXall 10 · 7 holders which blocks → | T-MOBILE USA, INC. | 6529 | VAN NUYS | CA |
| — | 818-679 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | BRBN BRBN | CA |
| — | 818-693 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | LSAN DA 01 | CA |
| — | 818-694 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | LSAN DA 01 | CA |
| — | 818-720 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | BRBN BRBN | CA |
| — | 818-723 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | SNFN SNFN | CA |
| — | 818-749 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | BRBN BRBN | CA |
| — | 818-822 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | BRBN SNVY | CA |
| — | 818-968 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | VAN NUYS | CA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.