NumberResearch Membership · Data 09/23/2026

Recent thousands-block assignments

59 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/23/2026

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. 59
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
2007-12-21 559-412-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2007-12-21 562-441-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DOWNEY CA
2007-12-21 619-450-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2007-12-21 619-740-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LA MESA CA
2007-12-21 626-316-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PSDN PSDN CA
2007-12-21 661-348-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2007-12-21 712-358-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HAVELOCK IA
2007-12-21 818-482-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 GLENDALE CA
2007-12-21 818-626-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 NORTHRIDGE CA
2007-12-21 915-208-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2007-12-21 915-412-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2007-12-21 915-412-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2007-12-21 915-412-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2007-12-21 916-706-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2007-12-21 949-315-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LAGUNA BCH CA
2007-12-21 951-208-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2007-12-20 208-346-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 IDAHOFALLS ID
2007-12-20 224-789-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ZION IL
2007-12-20 520-302-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2007-12-20 626-759-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2007-12-20 720-579-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2007-12-20 801-615-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2007-12-20 801-708-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-12-20 801-708-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-12-20 801-708-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-12-20 916-514-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2007-12-19 208-392-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BOISE ID
2007-12-19 316-299-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 WICHITA KS
2007-12-19 501-613-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2007-12-19 562-338-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ALAMITOS CA
2007-12-19 702-666-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2007-12-19 702-666-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2007-12-19 702-666-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2007-12-19 720-903-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2007-12-19 720-903-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2007-12-19 720-917-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2007-12-19 720-917-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2007-12-19 720-917-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2007-12-19 808-469-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HONOLULU HI
2007-12-19 808-469-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HONOLULU HI
2007-12-18 210-544-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2007-12-18 682-557-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2007-12-18 773-801-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2007-12-17 773-639-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-12-14 773-543-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2007-12-14 773-543-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2007-12-14 773-543-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2007-12-14 773-543-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2007-12-14 773-543-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2007-12-14 773-543-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.