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 |
|---|---|---|---|---|---|---|
| 2013-11-12 | 808-670 | 0–9 XXXall 10 · 4 holders which blocks → | SANDWICH ISLES COMMUNICATIONS, INC. | 3021 | HONOLULU | HI |
| 2010-01-15 | 808-740 | 0–9 XXXall 10 · 4 holders which blocks → | SANDWICH ISLES COMMUNICATIONS, INC. | 3021 | WAILUKU | HI |
| 2007-02-06 | 808-320 | 0–9 XXXall 10 · 5 holders which blocks → | SANDWICH ISLES COMMUNICATIONS, INC. | 3021 | LIHUE | HI |
| 2006-05-17 | 808-770 | not yet reported which blocks → | SANDWICH ISLES COMMUNICATIONS, INC. | 3021 | LANAI CITY | HI |
| 2004-01-22 | 808-620 | 0–9 XXXall 10 · 2 holders which blocks → | SANDWICH ISLES COMMUNICATIONS, INC. | 3021 | HONOLULU | HI |
| 2002-03-28 | 808-820 | not yet reported which blocks → | SANDWICH ISLES COMMUNICATIONS, INC. | 3021 | LIHUE | HI |
| — | 808-355 | not yet reported which blocks → | SANDWICH ISLES COMMUNICATIONS, INC. | 3021 | HILO | HI |
| — | 808-426 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | SANDWICH ISLES COMMUNICATIONS, INC. | 3021 | HONOLULU | HI |
| — | 808-520 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX which blocks → | SANDWICH ISLES COMMUNICATIONS, INC. | 3021 | HONOLULU | HI |
| — | 808-560 | not yet reported which blocks → | SANDWICH ISLES COMMUNICATIONS, INC. | 3021 | KAUNAKAKAI | HI |
| — | 808-760 | not yet reported which blocks → | SANDWICH ISLES COMMUNICATIONS, INC. | 3021 | WAILUKU | HI |
| — | 808-890 | not yet reported which blocks → | SANDWICH ISLES COMMUNICATIONS, INC. | 3021 | HILO | HI |
| — | 808-920 | not yet reported which blocks → | SANDWICH ISLES COMMUNICATIONS, INC. | 3021 | HILO | HI |
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.