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 209
T-MOBILE USA, INC. 69
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
2023-07-18 209-517 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 JAMESTOWN CA
2022-06-08 209-960 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 TURLOCK CA
2022-03-10 209-767 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2022-02-10 209-919 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 OAKDALE CA
2021-12-08 209-864 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2021-07-16 209-849 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MODESTO CA
2021-07-16 209-875 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MERCED CA
2021-03-18 209-889 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 STOCKTON CA
2021-02-09 209-657 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 RIVERBANK CA
2020-10-16 209-741 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2020-10-15 209-717 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MANTECA CA
2020-08-27 209-693 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LODI CA
2020-08-21 209-692 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SNRA MAIN CA
2020-05-28 209-685 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 STOCKTON CA
2019-12-09 209-582 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2019-10-18 209-494 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MODESTO CA
2019-05-28 209-540 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SNRA MAIN CA
2018-11-26 209-519 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LOS BANOS CA
2018-01-08 209-219 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2017-02-17 209-318 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 OAKDALE CA
2016-11-28 209-621 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HUGHSON CA
2016-11-21 209-905 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 STOCKTON CA
2016-09-02 209-641 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 STOCKTON CA
2016-08-26 209-360 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MODESTO CA
2016-05-24 209-280 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LODI CA
2016-05-16 209-278 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 TRACY CA
2016-04-06 209-702 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 MODESTO CA
2015-05-04 209-486 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 MODESTO CA
2015-04-16 209-696 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 STOCKTON CA
2015-04-01 209-270 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LOS BANOS CA
2015-04-01 209-302 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MANTECA CA
2015-04-01 209-453 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 STOCKTON CA
2015-03-13 209-445 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2015-03-09 209-427 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 TURLOCK CA
2015-01-20 209-421 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MERCED CA
2014-09-23 209-328 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MANTECA CA
2014-03-21 209-857 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 MODESTO CA
2013-07-11 209-292 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 STOCKTON CA
2013-05-06 209-276 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2012-04-30 209-272 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 MODESTO CA
2012-03-29 209-269 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LODI CA
2010-10-19 209-701 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 ESCALON CA
2002-09-19 209-502 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 RIVERBANK CA
2002-09-19 209-542 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 HUGHSON CA
2002-09-19 209-676 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2002-09-19 209-764 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → T-MOBILE USA, INC. 6529 OAKDALE CA
2002-03-21 209-640 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 TRACY CA
2002-03-21 209-663 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 LODI CA
2002-03-21 209-740 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 TRACY CA
2002-03-21 209-752 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 LOS BANOS CA

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.