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
2017-07-20 737-221-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SAN MARCOS TX
2017-07-19 903-336-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TEXARKANA TX
2017-07-18 312-481-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2017-07-18 312-481-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2017-07-17 425-362-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-07-17 425-362-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-07-17 425-362-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-07-17 575-339-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LAS CRUCES NM
2017-07-17 925-660-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PLEASANTON CA
2017-07-14 650-309-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2017-07-14 760-782-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 WARNER SPG CA
2017-07-14 760-783-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ENCINITAS CA
2017-07-14 760-783-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ENCINITAS CA
2017-07-14 831-400-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SANTA CRUZ CA
2017-07-13 206-480-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-07-13 206-480-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-07-13 206-480-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-07-13 206-480-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-07-13 213-218-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2017-07-13 213-310-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2017-07-13 213-310-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2017-07-13 626-206-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 COVINA CA
2017-07-13 626-206-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 COVINA CA
2017-07-13 626-206-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COVINA CA
2017-07-13 626-545-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-07-13 626-545-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-07-13 626-545-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-07-13 626-545-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-07-13 626-545-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-07-13 626-545-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-07-13 830-327-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 NEWBRANFLS TX
2017-07-13 949-880-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 IRVINE CA
2017-07-13 949-880-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 IRVINE CA
2017-07-12 940-514-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DENTON TX
2017-07-11 360-622-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SAN JUAN WA
2017-07-10 312-481-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2017-07-10 312-481-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2017-07-10 312-481-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2017-07-10 312-481-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2017-07-07 951-429-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WOODCREST CA
2017-07-07 972-940-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DALLAS TX
2017-07-07 972-940-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DALLAS TX
2017-07-06 314-396-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2017-07-06 940-641-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 GAINESVL TX
2017-06-26 870-627-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2017-06-26 870-627-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2017-06-26 870-938-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2017-06-26 870-938-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2017-06-23 479-367-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BENTONVL AR
2017-06-23 479-367-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BENTONVL AR

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.