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
2016-05-06 870-360-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PINE BLUFF AR
2016-05-04 775-515-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CARSONCITY NV
2016-05-04 775-515-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CARSONCITY NV
2016-05-03 425-230-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-05-02 626-360-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PSDN PSDN CA
2016-05-02 626-360-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PSDN PSDN CA
2016-05-02 682-256-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-05-02 682-256-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-05-02 682-256-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-05-02 682-256-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-05-02 682-256-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-05-02 682-256-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-05-02 682-256-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-05-02 682-256-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-05-02 682-256-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-05-02 682-256-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-04-29 424-308-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SAN PEDRO CA
2016-04-29 425-525-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2016-04-29 425-525-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2016-04-29 509-608-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2016-04-29 509-608-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2016-04-29 559-571-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 VISALIA CA
2016-04-29 562-302-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DOWNEY CA
2016-04-29 580-277-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARDMORE OK
2016-04-29 650-250-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2016-04-29 915-259-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2016-04-28 415-909-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2016-04-28 505-557-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SANTA FE NM
2016-04-28 520-619-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 NOGALES AZ
2016-04-28 657-246-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BREA CA
2016-04-28 760-566-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SAN MARCOS CA
2016-04-28 805-819-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LOMPOC CA
2016-04-27 254-350-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KILLEEN TX
2016-04-27 254-350-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KILLEEN TX
2016-04-27 512-400-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BUDA TX
2016-04-27 669-271-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LOS GATOS CA
2016-04-27 682-252-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-04-27 682-804-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 WEATHERFD TX
2016-04-27 682-804-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WEATHERFD TX
2016-04-27 737-999-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BUDA TX
2016-04-27 817-513-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-04-27 818-619-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFN PACM CA
2016-04-26 209-302-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MANTECA CA
2016-04-26 530-717-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICO CA
2016-04-26 530-717-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICO CA
2016-04-26 619-486-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 EL CAJON CA
2016-04-26 628-220-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2016-04-26 628-220-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2016-04-26 661-585-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2016-04-26 915-262-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 EL PASO TX

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.