NumberResearch Membership · Data 09/27/2026

Recent thousands-block assignments

68 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/27/2026

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
2014-07-15 909-492-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MENTONE CA
2014-07-15 909-929-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2014-07-15 909-929-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2014-07-15 928-299-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2014-07-15 928-362-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SAFFORD AZ
2014-07-14 262-744-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ALLENTON WI
2014-07-14 575-404-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2014-07-14 575-404-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2014-07-14 575-495-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2014-07-14 580-291-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LAWTON OK
2014-07-14 580-291-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LAWTON OK
2014-07-14 636-259-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 GRAYSUMMIT MO
2014-07-14 920-316-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OOSTBURG WI
2014-07-11 219-304-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WESTVILLE IN
2014-07-11 224-413-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 WAUKEGAN IL
2014-07-11 224-413-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 WAUKEGAN IL
2014-07-11 224-814-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ROUND LAKE IL
2014-07-11 224-814-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ROUND LAKE IL
2014-07-11 307-920-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2014-07-11 307-920-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2014-07-11 331-234-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SUGARGROVE IL
2014-07-11 440-990-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ASHTABULA OH
2014-07-11 440-990-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ASHTABULA OH
2014-07-11 440-990-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ASHTABULA OH
2014-07-11 630-827-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LOMBARD IL
2014-07-11 630-827-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LOMBARD IL
2014-07-11 630-827-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LOMBARD IL
2014-07-10 720-609-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2014-07-10 720-609-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2014-07-10 720-609-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2014-07-10 720-609-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2014-07-10 720-609-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2014-07-09 206-451-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2014-07-09 206-451-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2014-07-09 206-451-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2014-07-09 520-328-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2014-07-09 520-328-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2014-07-09 520-328-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2014-07-09 909-352-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MARSHALL CA
2014-07-02 737-999-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BUDA TX
2014-07-01 636-206-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ST CHARLES MO
2014-07-01 636-392-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 WASHINGTON MO
2014-07-01 636-775-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TROY MO
2014-06-30 425-229-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-06-30 425-229-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-06-30 425-229-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-06-30 669-237-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CAMPBELL CA
2014-06-30 669-237-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CAMPBELL CA
2014-06-27 779-702-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2014-06-27 779-702-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 JOLIET IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.