NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026
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 |
|---|---|---|---|---|---|---|
| — | 808-387 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-389 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-391 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-392 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-429 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-478 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-479 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-557 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | HILO | HI |
| — | 808-561 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-647 | 1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | LIHUE | HI |
| — | 808-741 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-778 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-779 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-780 | 0XXX which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-781 | 0XXX which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-782 | 0XXX which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-783 | 0XXX which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-864 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| — | 808-870 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | WAILUKU | HI |
| — | 808-960 | 9XXX which blocks → | T-MOBILE USA, INC. | 6529 | HILO | HI |
| — | 808-989 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | HILO | HI |
| — | 808-990 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | HILO | HI |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.