NumberResearch Membership · Data 09/25/2026

Recent thousands-block assignments

68 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. 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
2018-10-02 657-348-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ORANGE CA
2018-10-02 707-699-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 NAPA CA
2018-10-02 909-513-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2018-10-02 909-513-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2018-10-02 909-513-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2018-10-02 951-386-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 WOODCREST CA
2018-10-01 509-550-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 NEWPORT WA
2018-10-01 775-395-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RENO NV
2018-10-01 808-940-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HONOLULU HI
2018-10-01 808-940-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HONOLULU HI
2018-09-27 309-350-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ROCKISLAND IL
2018-09-27 309-350-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ROCKISLAND IL
2018-09-27 309-350-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ROCKISLAND IL
2018-09-27 312-872-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2018-09-27 779-255-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2018-09-21 206-665-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2018-09-21 469-558-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ENNIS TX
2018-09-21 469-558-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ENNIS TX
2018-09-21 539-218-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MUSKOGEE OK
2018-09-19 430-775-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CORSICANA TX
2018-09-19 725-208-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LAUGHLIN NV
2018-09-19 806-548-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LUBBOCK TX
2018-09-19 806-749-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LUBBOCK TX
2018-09-19 806-780-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LUBBOCK TX
2018-09-18 214-241-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ENNIS TX
2018-09-18 562-503-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NORWALK CA
2018-09-18 657-365-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2018-09-18 747-274-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFN PACM CA
2018-09-18 925-503-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2018-09-18 972-330-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ENNIS TX
2018-09-17 206-636-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2018-09-17 206-636-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2018-09-17 206-636-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2018-09-17 206-636-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2018-09-17 480-531-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2018-09-17 480-531-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2018-09-17 480-531-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2018-09-17 628-263-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-09-17 628-502-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-09-17 628-502-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-09-17 661-825-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TEHACHAPI CA
2018-09-14 217-850-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2018-09-14 312-200-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2018-09-14 312-210-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2018-09-14 312-210-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2018-09-14 312-210-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2018-09-14 312-210-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2018-09-14 312-210-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2018-09-14 424-419-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2018-09-14 669-240-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LOS GATOS CA

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.