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 405
T-MOBILE USA, INC. 87
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
2023-01-11 405-995 0XXX1XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 HOLDENVL OK
2022-09-29 405-363 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 EDMOND OK
2022-09-29 405-978 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BETHANY OK
2021-06-01 405-986 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHANDLER OK
2021-06-01 405-989 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 HOLDENVL OK
2021-05-18 405-956 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 BETHANY OK
2021-01-20 405-907 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHANDLER OK
2020-10-02 405-981 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BETHANY OK
2020-09-14 405-916 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EDMOND OK
2020-03-10 405-856 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EDMOND OK
2020-03-10 405-868 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 BETHANY OK
2019-06-21 405-866 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PAULS VLY OK
2019-04-09 405-854 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 STILLWATER OK
2019-04-08 405-836 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHANDLER OK
2018-10-31 405-851 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 SEMINOLE OK
2018-08-31 405-934 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2018-03-29 405-490 0XXX1XXX2XXX3XXX4XXX5XXX9XXX which blocks → T-MOBILE USA, INC. 6529 ANADARKO OK
2017-08-01 405-746 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 SEMINOLE OK
2016-08-31 405-480 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 ANADARKO OK
2015-09-22 405-438 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2015-07-21 405-968 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2015-06-11 405-982 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2015-03-09 405-965 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHANDLER OK
2014-03-03 405-430 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2013-06-12 405-402 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ANADARKO OK
2013-06-12 405-835 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2013-05-23 405-404 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHANDLER OK
2013-04-30 405-339 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ANADARKO OK
2012-06-19 405-667 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2012-05-15 405-569 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2012-05-14 405-859 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2012-03-13 405-468 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2012-03-08 405-662 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2011-12-27 405-565 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2011-12-13 405-675 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2011-10-17 405-505 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2011-08-25 405-223 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2007-09-06 405-887 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2007-07-31 405-305 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2007-06-01 405-537 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2007-04-18 405-585 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SHAWNEE OK
2006-11-01 405-436 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2006-10-13 405-532 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2006-05-22 405-512 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2005-11-14 405-371 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2002-05-23 405-589 2XXX3XXX4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 CHANDLER OK
2002-04-16 405-926 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 PAULS VLY OK
2002-04-04 405-762 2XXX3XXX4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 STILLWATER OK
2001-12-14 405-788 0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 SHAWNEE OK
2001-02-27 405-361 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK

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.