NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 970
T-MOBILE USA, INC. 70
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
2025-12-03 970-917 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 DURANGO CO
2024-05-23 970-637 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DURANGO CO
2022-11-23 970-559 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DURANGO CO
2022-11-09 970-505 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GLENWD SPG CO
2022-08-24 970-307 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 GRAND JCT CO
2022-02-04 970-814 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DURANGO CO
2021-11-09 970-896 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 STEAMBOSPG CO
2021-10-26 970-804 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
2021-02-16 970-501 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 DURANGO CO
2020-10-29 970-792 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 FT COLLINS CO
2020-08-26 970-793 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
2020-07-29 970-694 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 FT COLLINS CO
2018-10-11 970-973 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 GLENWD SPG CO
2018-08-27 970-473 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
2016-12-07 970-816 0–9 XXXall 10 · 8 holders which blocks → T-MOBILE USA, INC. 6529 CORTEZ CO
2016-11-23 970-844 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 DURANGO CO
2014-11-25 970-822 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 GRAND JCT CO
2014-10-13 970-825 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 FT COLLINS CO
2014-03-20 970-294 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 FT COLLINS CO
2014-03-05 970-815 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
2013-10-18 970-889 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 FT COLLINS CO
2007-02-23 970-582 1XXX2XXX3XXX4XXX5XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 PAGOSA SPG CO
2003-01-21 970-779 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 DURANGO CO
2002-12-18 970-433 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 GRAND JCT CO
2002-10-16 970-575 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 FRASER CO
2002-10-16 970-576 3XXX4XXX7XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
2002-06-11 970-355 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 GLENWD SPG CO
2001-10-26 970-631 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 FT COLLINS CO
2001-06-28 970-430 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 FT COLLINS CO
2001-04-24 970-404 3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 GLENWD SPG CO
2001-04-24 970-405 not yet reported which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
2001-04-16 970-393 1XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 VAIL CO
— 970-201 4XXX5XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 GRAND JCT CO
— 970-213 none assigned yet which blocks → T-MOBILE USA, INC. 6529 FT COLLINS CO
— 970-230 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → T-MOBILE USA, INC. 6529 GLENWD SPG CO
— 970-234 not yet reported which blocks → T-MOBILE USA, INC. 6529 GRAND JCT CO
— 970-281 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 7 holders which blocks → T-MOBILE USA, INC. 6529 FRASER CO
— 970-291 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 STEAMBOSPG CO
— 970-310 not yet reported which blocks → T-MOBILE USA, INC. 6529 FT COLLINS CO
— 970-331 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 VAIL CO
— 970-361 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GRAND JCT CO
— 970-391 none assigned yet which blocks → T-MOBILE USA, INC. 6529 FT COLLINS CO
— 970-402 not yet reported which blocks → T-MOBILE USA, INC. 6529 FT COLLINS CO
— 970-412 not yet reported which blocks → T-MOBILE USA, INC. 6529 FT COLLINS CO
— 970-426 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 DURANGO CO
— 970-470 4XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 VAIL CO
— 970-515 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
— 970-518 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
— 970-534 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
— 970-556 1XXX2XXX3XXX4XXX5XXX8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 FT COLLINS CO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.