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
2014-11-10 424-392-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 REDONDO CA
2014-11-10 424-392-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 REDONDO CA
2014-11-10 424-392-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 REDONDO CA
2014-11-10 501-864-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SYVNHLSHWD AR
2014-11-10 501-864-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SYVNHLSHWD AR
2014-11-10 501-864-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SYVNHLSHWD AR
2014-11-10 501-864-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SYVNHLSHWD AR
2014-11-10 909-662-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2014-11-10 909-662-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2014-11-10 909-662-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2014-11-10 909-662-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2014-11-10 909-662-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2014-11-07 209-326-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ATWATER CA
2014-11-07 209-326-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ATWATER CA
2014-11-07 325-701-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ABILENE TX
2014-11-07 415-319-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2014-11-07 442-248-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ESCONDIDO CA
2014-11-07 559-373-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MADERA CA
2014-11-07 562-287-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DOWNEY CA
2014-11-07 562-287-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DOWNEY CA
2014-11-07 626-634-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COVINA CA
2014-11-07 626-634-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 COVINA CA
2014-11-07 628-777-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2014-11-07 628-777-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2014-11-07 747-231-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 GLENDALE CA
2014-11-07 747-231-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 GLENDALE CA
2014-11-07 760-750-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SAN MARCOS CA
2014-11-07 760-750-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SAN MARCOS CA
2014-11-07 971-331-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2014-11-07 971-331-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2014-11-07 971-331-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2014-11-07 971-331-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2014-11-07 971-331-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2014-11-07 971-331-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2014-11-07 971-331-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2014-11-07 971-331-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2014-11-06 224-727-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DEERFIELD IL
2014-11-06 224-727-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DEERFIELD IL
2014-11-06 626-295-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LA PUENTE CA
2014-11-06 626-295-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LA PUENTE CA
2014-11-06 626-295-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LA PUENTE CA
2014-11-06 626-295-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LA PUENTE CA
2014-11-06 626-295-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LA PUENTE CA
2014-11-05 219-386-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 VALPARAISO IN
2014-11-05 219-386-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 VALPARAISO IN
2014-11-05 618-560-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2014-11-05 618-789-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2014-11-04 314-736-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2014-11-04 314-736-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2014-11-04 314-764-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LADUE MO

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.