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 262
T-MOBILE USA, INC. 42
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
2025-04-29 262-535 0XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 JACKSON WI
2025-01-27 262-479 9XXX which blocks → T-MOBILE USA, INC. 6529 WIND LAKE WI
2025-01-16 262-471 0XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 ELKHORN WI
2024-09-04 262-460 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ALLENTON WI
2022-08-29 262-341 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ALLENTON WI
2022-07-28 262-301 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 RACINE WI
2021-09-16 262-294 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LAKEGENEVA WI
2021-04-14 262-280 0XXX1XXX4XXX5XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 WATERFORD WI
2020-10-01 262-267 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 DELAVAN WI
2015-11-25 262-475 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LAKEGENEVA WI
2014-11-13 262-583 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 RACINE WI
2013-10-08 262-505 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN2 WI
2013-09-09 262-232 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 WAUKESHA WI
2011-02-28 262-955 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 WAUKESHA WI
2007-10-10 262-393 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ALLENTON WI
2002-04-02 262-649 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN2 WI
2001-08-23 262-343 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 WEST BEND WI
2001-06-05 262-323 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 NEWBURG WI
2001-04-27 262-344 5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 KENOSHA WI
2001-04-16 262-302 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 THIENSVL WI
— 262-269 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 OCONOMOWOC WI
— 262-271 not yet reported which blocks → T-MOBILE USA, INC. 6529 WAUKESHA WI
— 262-327 5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN2 WI
— 262-332 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 WATERFORD WI
— 262-391 2XXX which blocks → T-MOBILE USA, INC. 6529 WAUKESHA WI
— 262-412 not yet reported which blocks → T-MOBILE USA, INC. 6529 RACINE WI
— 262-434 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 OCONOMOWOC WI
— 262-510 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 WAUKESHA WI
— 262-613 8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 WAUKESHA WI
— 262-620 none assigned yet which blocks → T-MOBILE USA, INC. 6529 KENOSHA WI
— 262-627 1XXX2XXX3XXX5XXX7XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 SLINGER WI
— 262-716 0XXX2XXX5XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 BURLINGTON WI
— 262-744 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 ALLENTON WI
— 262-745 0XXX which blocks → T-MOBILE USA, INC. 6529 LAKEGENEVA WI
— 262-749 1XXX2XXX3XXX5XXX7XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 DELAVAN WI
— 262-751 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 WAUKESHA WI
— 262-770 3XXX4XXX5XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 RACINE WI
— 262-813 3XXX6XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 PALMYRA WI
— 262-865 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 RACINE WI
— 262-873 1XXX2XXX3XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 WAUBEKA WI
— 262-880 none assigned yet which blocks → T-MOBILE USA, INC. 6529 RACINE WI
— 262-893 none assigned yet which blocks → T-MOBILE USA, INC. 6529 WAUKESHA WI

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.