NumberResearch Membership · Data 09/26/2026

Recent thousands-block assignments

68 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/26/2026

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
2017-03-15 870-360-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PINE BLUFF AR
2017-03-15 970-451-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 GREELEY CO
2017-03-15 970-451-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 GREELEY CO
2017-03-15 970-451-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 GREELEY CO
2017-03-15 970-451-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 GREELEY CO
2017-03-14 360-661-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MT VERNON WA
2017-03-14 458-209-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EUGENE OR
2017-03-14 669-208-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LOS GATOS CA
2017-03-14 858-280-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2017-03-14 951-418-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2017-03-14 951-418-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2017-03-13 206-751-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-03-13 206-751-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-03-13 206-751-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-03-13 909-768-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CALIMESA CA
2017-03-13 971-287-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MCMINNVL OR
2017-03-10 669-286-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MORGANHILL CA
2017-03-10 737-881-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BASTROP TX
2017-03-10 737-881-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BASTROP TX
2017-03-10 737-881-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BASTROP TX
2017-03-10 972-903-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 WAXAHACHIE TX
2017-03-10 972-903-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 WAXAHACHIE TX
2017-03-09 360-728-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2017-03-09 510-513-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2017-03-09 510-826-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2017-03-09 510-826-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2017-03-09 562-278-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NORWALK CA
2017-03-09 562-732-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LAKEWOOD CA
2017-03-09 626-503-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-03-09 626-503-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-03-09 626-503-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-03-09 626-503-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-03-09 626-503-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-03-09 909-530-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2017-03-09 909-530-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2017-03-08 206-588-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-03-08 206-712-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-03-08 213-374-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2017-03-08 213-374-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2017-03-08 323-398-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2017-03-08 323-509-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2017-03-08 323-925-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2017-03-08 425-589-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-03-08 425-589-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-03-08 425-589-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-03-08 425-589-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-03-08 425-589-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-03-08 501-293-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HOTSPRINGS AR
2017-03-08 501-293-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 HOTSPRINGS AR
2017-03-08 501-293-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HOTSPRINGS AR

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.