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
2019-06-21 405-866-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PAULS VLY OK
2019-06-21 405-866-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PAULS VLY OK
2019-06-21 405-866-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PAULS VLY OK
2019-06-21 415-375-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2019-06-21 424-328-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LOMITA CA
2019-06-21 424-409-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 REDONDO CA
2019-06-21 424-499-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EL SEGUNDO CA
2019-06-21 530-573-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SOUTHTAHOE CA
2019-06-21 657-366-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 YORBALINDA CA
2019-06-21 669-260-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNJS NORTH CA
2019-06-21 669-699-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2019-06-21 747-246-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFN SNFN CA
2019-06-21 747-277-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 NO HOLLYWD CA
2019-06-21 760-794-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PALM SPG CA
2019-06-21 805-670-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OXNARD CA
2019-06-21 805-670-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OXNARD CA
2019-06-21 808-666-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 WAILUKU HI
2019-06-21 820-200-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 THOUSAOAKS CA
2019-06-21 925-730-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PLEASANTON CA
2019-06-21 925-860-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SUNOL CA
2019-06-21 940-279-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LAKEDALLAS TX
2019-06-21 949-516-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LAGUNA BCH CA
2019-06-21 949-534-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TRABUCO CA
2019-06-20 702-344-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MESQUITE NV
2019-06-20 702-344-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MESQUITE NV
2019-06-20 720-779-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2019-06-20 720-779-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2019-06-20 720-779-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2019-06-20 720-779-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2019-06-20 725-219-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2019-06-20 725-219-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2019-06-20 725-219-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2019-06-20 725-219-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2019-06-20 725-219-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2019-06-20 725-219-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2019-06-20 928-412-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LKHAVASUCY AZ
2019-06-19 206-581-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-06-19 206-581-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-06-19 206-581-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-06-19 206-581-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-06-19 206-581-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-06-19 206-688-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-06-19 657-373-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PLACENTIA CA
2019-06-18 331-246-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LEMONT IL
2019-06-18 331-246-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LEMONT IL
2019-06-18 331-246-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LEMONT IL
2019-06-18 331-246-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LEMONT IL
2019-06-18 331-246-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LEMONT IL
2019-06-18 331-246-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LEMONT IL
2019-06-18 331-246-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LEMONT IL

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.