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
2013-04-02 224-318-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2013-04-02 224-318-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2013-04-02 312-561-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-04-02 312-631-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-04-02 312-631-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-04-02 312-631-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-04-02 312-631-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-04-02 312-631-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-04-02 312-702-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-04-02 312-754-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-04-02 331-250-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AURORA IL
2013-04-02 331-250-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AURORA IL
2013-04-02 385-209-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2013-04-02 385-209-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2013-04-02 520-442-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BENSON AZ
2013-04-02 847-904-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 GLENVIEW IL
2013-03-29 208-497-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 IDAHOFALLS ID
2013-03-28 720-590-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2013-03-28 720-590-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2013-03-28 720-590-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2013-03-28 720-590-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2013-03-28 720-723-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2013-03-28 720-723-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2013-03-28 720-723-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2013-03-27 510-990-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2013-03-27 650-669-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MT VIEW CA
2013-03-27 650-943-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MT VIEW CA
2013-03-22 254-400-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 WACO TX
2013-03-22 254-400-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WACO TX
2013-03-22 254-400-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WACO TX
2013-03-22 650-666-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2013-03-20 708-315-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LA GRANGE IL
2013-03-20 708-315-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LA GRANGE IL
2013-03-19 513-806-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2013-03-19 872-209-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-03-19 872-209-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-03-19 872-209-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-03-19 872-209-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-03-19 872-209-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-03-14 360-306-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WHATCOMCTY WA
2013-03-14 509-415-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WENATCHEE WA
2013-03-13 469-510-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 GRANDPRARI TX
2013-03-13 469-510-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 GRANDPRARI TX
2013-03-13 469-510-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 GRANDPRARI TX
2013-03-13 469-510-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 GRANDPRARI TX
2013-03-13 469-510-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 GRANDPRARI TX
2013-03-13 469-510-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 GRANDPRARI TX
2013-03-11 330-304-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MEDINA OH
2013-03-11 440-296-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PAINESVL OH
2013-03-11 479-306-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SPRINGDALE 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.