NumberResearch Membership · Data 09/22/2026

Recent thousands-block assignments

31 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/22/2026

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 — NPA 657
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 30
BANDWIDTH.COM CLEC, LLC - CA 1
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
2021-10-15 657-526-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H ANAHEIM CA
2021-10-15 657-526-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H ANAHEIM CA
2021-10-15 657-526-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H ANAHEIM CA
2021-10-15 657-526-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H ANAHEIM CA
2021-10-14 657-544-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H SILVERADO CA
2021-10-14 657-544-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H SILVERADO CA
2021-10-13 657-531-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HUNTITNBCH CA
2021-10-13 657-531-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HUNTITNBCH CA
2021-10-11 657-502-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HUNTITNBCH CA
2021-10-06 657-526-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 ANAHEIM CA
2021-10-01 657-525-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FULLERTON CA
2021-10-01 657-525-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FULLERTON CA
2021-09-27 657-523-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 GARDEN GRV CA
2021-09-24 657-525-0XXX 0000–0999Assigned COMMIO, LLC 939H FULLERTON CA
2021-09-24 657-525-1XXX 1000–1999Assigned COMMIO, LLC 939H FULLERTON CA
2021-09-24 657-525-2XXX 2000–2999Assigned COMMIO, LLC 939H FULLERTON CA
2021-09-24 657-525-3XXX 3000–3999Assigned COMMIO, LLC 939H FULLERTON CA
2021-09-22 657-508-5XXX 5000–5999Assigned COMMIO, LLC 939H CYPRESS CA
2021-09-22 657-508-6XXX 6000–6999Assigned COMMIO, LLC 939H CYPRESS CA
2021-09-21 657-799-7XXX 7000–7999Assigned COMMIO, LLC 939H FULLERTON CA
2021-09-20 657-514-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C BUENA PARK CA
2021-09-20 657-514-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C BUENA PARK CA
2021-09-20 657-514-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C BUENA PARK CA
2021-09-10 657-514-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BUENA PARK CA
2021-09-10 657-514-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BUENA PARK CA
2021-09-02 657-520-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-02 657-520-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-02 657-520-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-02 657-520-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-02 657-520-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-02 657-520-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-01 657-744-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-01 657-744-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-01 657-744-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-01 657-744-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-01 657-744-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-01 657-744-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-01 657-744-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-01 657-744-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-01 657-744-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-08-26 657-508-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CYPRESS CA
2021-08-23 657-527-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2021-08-23 657-527-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2021-08-23 657-527-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2021-08-23 657-527-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2021-08-23 657-527-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2021-08-23 657-527-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2021-08-23 657-527-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2021-08-23 657-527-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2021-08-23 657-527-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.