NumberResearch Membership · Data 09/27/2026

Recent thousands-block assignments

68 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/27/2026

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
2014-03-04 937-815-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2014-03-04 937-815-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2014-03-03 213-294-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2014-03-03 213-294-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2014-03-03 213-294-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2014-03-03 314-764-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2014-03-03 314-764-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2014-03-03 405-430-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 OKLA CITY OK
2014-03-03 405-430-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OKLA CITY OK
2014-03-03 405-430-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OKLA CITY OK
2014-03-03 405-430-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLA CITY OK
2014-03-03 405-430-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLA CITY OK
2014-03-03 405-430-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLA CITY OK
2014-03-03 424-299-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNMN SNMN CA
2014-03-03 509-919-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2014-03-03 515-346-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2014-03-03 515-346-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2014-03-03 515-346-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2014-03-03 515-346-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2014-03-03 515-346-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2014-03-03 602-420-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-03 602-474-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-03 602-521-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-03 602-529-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-03 779-236-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2014-03-03 779-236-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2014-03-03 815-491-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2014-03-03 815-491-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2014-03-03 815-491-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2014-03-03 815-491-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2014-03-03 815-491-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2014-03-03 916-330-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2014-03-03 916-330-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2014-03-03 916-330-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2014-03-03 971-407-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2014-03-03 971-407-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2014-03-03 971-407-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2014-02-28 208-999-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BOISE ID
2014-02-28 208-999-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BOISE ID
2014-02-28 208-999-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BOISE ID
2014-02-28 217-904-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2014-02-28 217-904-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2014-02-28 217-904-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2014-02-28 217-904-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2014-02-28 219-323-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CROWNPOINT IN
2014-02-28 219-323-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CROWNPOINT IN
2014-02-28 253-213-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2014-02-28 253-213-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2014-02-28 253-213-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2014-02-28 309-445-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BLOOMINGTN IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.