NumberResearch Membership · Data 09/26/2026

Recent thousands-block assignments

68 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/26/2026

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

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days
T-MOBILE USA, INC. 68
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2017-06-23 724-551-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SHARON PA
2017-06-23 724-551-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SHARON PA
2017-06-23 724-551-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SHARON PA
2017-06-23 724-551-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SHARON PA
2017-06-21 262-351-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KENOSHA WI
2017-06-21 262-351-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KENOSHA WI
2017-06-21 262-351-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KENOSHA WI
2017-06-15 669-206-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SUNNYVALE CA
2017-06-12 737-216-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TAYLOR TX
2017-06-12 737-216-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TAYLOR TX
2017-06-09 541-239-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BAKER OR
2017-06-08 747-240-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 GLENDALE CA
2017-06-06 209-638-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TURLOCK CA
2017-06-06 636-312-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OFALLON MO
2017-06-06 747-257-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 GLENDALE CA
2017-06-02 219-216-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 VALPARAISO IN
2017-06-02 219-217-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WESTVILLE IN
2017-06-02 618-217-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WOOD RIVER IL
2017-06-02 618-217-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WOOD RIVER IL
2017-06-02 779-241-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MORRIS IL
2017-06-02 937-300-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EATON OH
2017-06-01 618-484-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2017-06-01 618-484-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2017-06-01 618-484-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2017-06-01 618-484-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2017-05-31 217-303-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2017-05-31 217-381-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2017-05-31 262-399-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 WAUKESHA WI
2017-05-31 262-399-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 WAUKESHA WI
2017-05-31 262-399-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 WAUKESHA WI
2017-05-31 262-629-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ALLENTON WI
2017-05-31 262-629-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ALLENTON WI
2017-05-31 262-629-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ALLENTON WI
2017-05-31 331-227-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SUGARGROVE IL
2017-05-31 331-227-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SUGARGROVE IL
2017-05-31 440-390-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 NOROYALTON OH
2017-05-31 440-390-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 NOROYALTON OH
2017-05-31 440-898-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PAINESVL OH
2017-05-31 440-898-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PAINESVL OH
2017-05-31 515-715-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AMES IA
2017-05-31 515-715-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AMES IA
2017-05-31 515-715-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AMES IA
2017-05-31 567-284-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ASHLAND OH
2017-05-31 567-284-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ASHLAND OH
2017-05-31 567-284-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ASHLAND OH
2017-05-31 567-284-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ASHLAND OH
2017-05-31 618-471-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 WOOD RIVER IL
2017-05-31 618-471-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WOOD RIVER IL
2017-05-31 618-504-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 WATERLOO IL
2017-05-31 618-504-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WATERLOO IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.