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
2016-02-04 209-696-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 STOCKTON CA
2016-02-04 628-236-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NOVATO CA
2016-02-03 903-423-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 GREENVILLE TX
2016-02-03 903-423-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 GREENVILLE TX
2016-02-01 206-899-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2016-02-01 206-899-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2016-02-01 530-717-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICO CA
2016-02-01 707-708-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SANTA ROSA CA
2016-02-01 916-559-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-02-01 916-559-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-02-01 916-559-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-02-01 916-559-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-02-01 916-559-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-01-29 520-595-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BENSON AZ
2016-01-29 737-213-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SAN MARCOS TX
2016-01-29 737-213-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SAN MARCOS TX
2016-01-29 928-955-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2016-01-28 602-668-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-28 602-668-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-28 602-668-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-28 602-668-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-28 602-668-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-27 541-930-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MEDFORD OR
2016-01-27 909-737-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HIGHLAND CA
2016-01-27 951-456-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MIRA LOMA CA
2016-01-26 775-990-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PAHRUMP NV
2016-01-25 480-401-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 480-401-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 480-401-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 480-401-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 480-527-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 480-565-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 480-565-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 602-833-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 602-884-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 623-200-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 623-200-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 623-200-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 623-200-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 623-200-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 623-200-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 623-200-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-25 626-629-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AZUSA CA
2016-01-25 760-907-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WARNER SPG CA
2016-01-25 858-951-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RNCHOSANFE CA
2016-01-25 858-951-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RNCHOSANFE CA
2016-01-25 928-605-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2016-01-22 360-763-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OLYMPIA WA
2016-01-21 253-289-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2016-01-21 253-433-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA

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.