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
2010-04-01 435-571-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2010-04-01 435-571-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2010-04-01 435-571-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2010-04-01 435-571-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2010-04-01 435-571-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2010-04-01 435-774-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-774-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-774-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-774-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-915-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-915-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-03-31 801-903-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-03-30 408-659-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MORGANHILL CA
2010-03-30 505-236-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 GALLUP NM
2010-03-29 330-244-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NO CANTON OH
2010-03-29 330-433-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 NO CANTON OH
2010-03-26 510-283-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2010-03-26 903-265-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CARTHAGE TX
2010-03-26 903-650-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ATLANTA TX
2010-03-25 435-239-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-03-25 435-239-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-03-25 435-239-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-03-25 435-494-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-03-25 435-494-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-03-25 435-494-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-03-25 435-494-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-03-25 435-494-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-03-25 435-494-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-03-25 435-494-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-03-25 760-498-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2010-03-25 801-462-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-03-25 801-462-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-03-25 801-462-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-03-25 801-462-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-03-25 801-462-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-03-25 801-462-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-03-25 801-462-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-03-25 801-946-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-03-25 801-946-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-03-25 801-946-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-03-22 715-504-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MARINETTE WI
2010-03-22 920-645-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MANITOWOC WI
2010-03-19 505-225-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2010-03-19 505-225-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2010-03-18 636-696-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OFALLON MO
2010-03-17 928-259-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2010-03-16 562-286-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ALAMITOS CA
2010-03-16 626-231-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ARCADIA CA
2010-03-16 714-467-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 GARDEN GRV CA
2010-03-15 480-745-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ

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.