NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

59 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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. 59
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
2007-05-18 814-520-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ERIE PA
2007-05-18 830-837-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NEWBRANFLS TX
2007-05-18 909-201-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FONTANA CA
2007-05-18 972-827-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 IRVING TX
2007-05-18 972-827-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 IRVING TX
2007-05-17 262-865-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 RACINE WI
2007-05-17 309-540-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 KEWANEE IL
2007-05-17 309-706-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BLOOMINGTN IL
2007-05-17 312-912-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2007-05-17 312-912-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2007-05-17 559-321-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CLOVIS CA
2007-05-17 714-886-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CYPRESS CA
2007-05-17 805-607-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OXNARD CA
2007-05-17 805-607-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OXNARD CA
2007-05-17 805-824-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OXNARD CA
2007-05-17 815-295-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2007-05-16 206-708-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2007-05-16 323-475-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2007-05-16 323-475-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2007-05-16 503-302-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SALEM OR
2007-05-16 503-488-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2007-05-16 626-283-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2007-05-16 818-397-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2007-05-16 818-397-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2007-05-16 818-641-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2007-05-16 818-641-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2007-05-16 937-610-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2007-05-16 949-554-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NEWPORTBCH CA
2007-05-16 949-609-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SADLBK VLY CA
2007-05-16 951-427-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2007-05-16 951-427-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2007-05-16 971-340-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2007-05-15 224-678-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ALGONQUIN IL
2007-05-15 254-339-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WACO TX
2007-05-15 254-339-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WACO TX
2007-05-15 515-899-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 RADCLIFFE IA
2007-05-15 562-846-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 WHITTIER CA
2007-05-15 562-846-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WHITTIER CA
2007-05-15 575-578-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ROSWELL NM
2007-05-15 626-324-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COVINA CA
2007-05-15 626-324-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 COVINA CA
2007-05-15 626-324-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 COVINA CA
2007-05-15 626-324-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COVINA CA
2007-05-15 626-324-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COVINA CA
2007-05-15 626-529-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PSDN PSDN CA
2007-05-15 626-529-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PSDN PSDN CA
2007-05-15 626-848-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COVINA CA
2007-05-15 630-457-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 GENEVA IL
2007-05-15 641-210-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MASON CITY IA
2007-05-15 650-267-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SSNFRNCSCO CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.