NumberResearch Membership · Data 09/25/2026

Recent thousands-block assignments

69 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/25/2026

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. 69
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
2020-01-10 501-505-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CONWAY AR
2020-01-10 505-737-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2020-01-10 719-420-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PUEBLO CO
2020-01-10 720-751-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2020-01-10 720-751-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2020-01-10 720-751-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2020-01-10 720-751-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2020-01-10 720-751-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2020-01-10 720-751-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2020-01-10 720-751-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2020-01-10 951-480-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2020-01-10 951-480-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2020-01-09 253-281-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2020-01-09 253-800-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2020-01-09 279-600-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2020-01-09 360-230-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MT VERNON WA
2020-01-09 360-919-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2020-01-09 425-465-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2020-01-09 425-465-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2020-01-09 425-465-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2020-01-09 480-690-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-01-09 602-580-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-01-09 602-580-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-01-09 602-580-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-01-09 602-580-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-01-09 602-580-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-01-09 602-580-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-01-09 602-580-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-01-09 602-580-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-01-09 657-758-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2020-01-09 669-270-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MORGANHILL CA
2020-01-09 707-209-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 VALLEJO CA
2020-01-09 707-209-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 VALLEJO CA
2020-01-09 872-258-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2020-01-09 872-258-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2020-01-09 872-258-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2020-01-09 872-258-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2020-01-09 872-258-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2020-01-09 872-258-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2020-01-09 872-258-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2020-01-09 872-258-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2020-01-09 909-769-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CALIMESA CA
2020-01-09 916-603-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2020-01-09 916-776-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 WALNUT GRV CA
2020-01-09 925-877-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2020-01-09 925-877-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2020-01-09 949-866-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SADLBK VLY CA
2020-01-09 951-855-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-01-08 279-202-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2020-01-08 360-506-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CENTRALIA WA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.