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
2016-11-28 559-785-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-11-28 559-832-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-11-28 559-832-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-11-28 562-386-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ALAMITOS CA
2016-11-28 562-474-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 NORWALK CA
2016-11-28 650-447-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MT VIEW CA
2016-11-28 650-476-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2016-11-28 650-476-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2016-11-28 650-476-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2016-11-28 657-275-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PLACENTIA CA
2016-11-28 657-275-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PLACENTIA CA
2016-11-28 657-348-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ORANGE CA
2016-11-28 661-227-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2016-11-28 661-227-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2016-11-28 661-227-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2016-11-28 669-278-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CAMPBELL CA
2016-11-28 669-278-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CAMPBELL CA
2016-11-28 669-377-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MORGANHILL CA
2016-11-28 747-214-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 NO HOLLYWD CA
2016-11-28 747-218-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LACRSCENTA CA
2016-11-28 747-257-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 GLENDALE CA
2016-11-28 760-840-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ENCINITAS CA
2016-11-28 760-840-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ENCINITAS CA
2016-11-28 760-884-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ESCONDIDO CA
2016-11-28 760-884-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ESCONDIDO CA
2016-11-28 760-906-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 RAMONA CA
2016-11-28 805-825-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARROYOGRND CA
2016-11-28 831-258-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SALINAS CA
2016-11-28 831-258-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SALINAS CA
2016-11-28 909-442-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RIALTO CA
2016-11-28 909-688-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 FONTANA CA
2016-11-28 909-760-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DIAMONDBAR CA
2016-11-28 916-767-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2016-11-28 916-767-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2016-11-28 916-892-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2016-11-28 949-522-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 IRVINE CA
2016-11-28 949-522-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 IRVINE CA
2016-11-28 949-522-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 IRVINE CA
2016-11-28 951-484-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2016-11-28 951-497-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2016-11-28 970-844-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DURANGO CO
2016-11-28 971-601-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SEASIDE OR
2016-11-25 331-315-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LOMBARD IL
2016-11-25 331-315-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LOMBARD IL
2016-11-25 331-315-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LOMBARD IL
2016-11-24 253-287-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2016-11-24 360-784-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 VANCOUVER WA
2016-11-24 509-558-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2016-11-24 510-424-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2016-11-24 510-424-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA

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.