NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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.

Most active assignees, all time — NPA 808
T-MOBILE USA, INC. 72
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2025-12-03 808-279 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 HILO HI
2025-10-01 808-991 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 HILO HI
2024-12-16 808-788 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2024-06-21 808-767 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 HILO HI
2023-10-20 808-642 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HILO HI
2023-10-20 808-663 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LIHUE HI
2022-10-19 808-751 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2022-10-11 808-830 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 WAILUKU HI
2022-09-30 808-229 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 HILO HI
2022-07-21 808-509 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2022-01-09 808-743 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 WAILUKU HI
2019-04-18 808-466 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2019-04-17 808-437 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 HILO HI
2016-08-01 808-517 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2016-06-17 808-773 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2015-09-17 808-796 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HILO HI
2015-06-08 808-745 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2014-10-03 808-784 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2014-08-29 808-304 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2014-07-18 808-726 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2014-03-31 808-308 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2014-01-24 808-724 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2013-06-14 808-725 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2006-07-11 808-450 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2005-01-05 808-457 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2002-10-31 808-728 not yet reported which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2002-06-19 808-358 not yet reported which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2001-12-17 808-330 none assigned yet which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2001-11-20 808-631 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 LIHUE HI
2001-11-15 808-398 not yet reported which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2001-07-20 808-216 none assigned yet which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
— 808-205 not yet reported which blocks → T-MOBILE USA, INC. 6529 WAILUKU HI
— 808-218 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
— 808-255 not yet reported which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
— 808-256 not yet reported which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
— 808-258 not yet reported which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
— 808-276 not yet reported which blocks → T-MOBILE USA, INC. 6529 WAILUKU HI
— 808-277 not yet reported which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
— 808-298 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 WAILUKU HI
— 808-357 4XXX5XXX8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 WAILUKU HI
— 808-359 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 WAILUKU HI
— 808-371 none assigned yet which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
— 808-372 none assigned yet which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
— 808-375 none assigned yet which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
— 808-381 not yet reported which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
— 808-382 not yet reported which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
— 808-383 not yet reported which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
— 808-384 not yet reported which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
— 808-385 not yet reported which blocks → T-MOBILE USA, INC. 6529 WAILUKU HI
— 808-386 not yet reported which blocks → T-MOBILE USA, INC. 6529 HONOLULU 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.