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
2021-07-18 657-866-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C YORBALINDA CA
2021-07-16 657-508-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C CYPRESS CA
2021-07-16 657-508-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C CYPRESS CA
2021-07-16 657-508-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C CYPRESS CA
2021-07-16 657-508-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C CYPRESS CA
2021-07-07 657-510-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-07-07 657-510-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-07-07 657-510-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-07-07 657-510-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-07-07 657-510-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-07-07 657-510-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-07-07 657-510-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-07-07 657-510-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-07-07 657-510-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-07-07 657-510-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-07-07 657-512-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-07-07 657-512-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-07-07 657-512-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-07-07 657-512-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-07-07 657-512-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-07-07 657-512-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-07-07 657-512-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-07-07 657-512-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-07-07 657-512-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-07-07 657-512-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-07-07 657-533-3XXX 3000–3999Assigned FRACTEL, LLC 965H ANAHEIM CA
2021-07-07 657-544-4XXX 4000–4999Assigned FRACTEL, LLC 965H SILVERADO CA
2021-07-07 657-633-3XXX 3000–3999Assigned FRACTEL, LLC 965H HUNTITNBCH CA
2021-07-07 657-744-4XXX 4000–4999Assigned FRACTEL, LLC 965H SANTA ANA CA
2021-07-01 657-509-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-07-01 657-509-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-07-01 657-509-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-07-01 657-509-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-07-01 657-509-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-07-01 657-509-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-07-01 657-509-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-07-01 657-509-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-07-01 657-509-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-07-01 657-509-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-06-30 657-508-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CYPRESS CA
2021-06-30 657-508-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CYPRESS CA
2021-06-25 657-427-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C GARDEN GRV CA
2021-06-25 657-427-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C GARDEN GRV CA
2021-06-25 657-452-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C BUENA PARK CA
2021-06-25 657-452-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C BUENA PARK CA
2021-06-25 657-478-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C BREA CA
2021-06-25 657-502-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C HUNTITNBCH CA
2021-06-25 657-502-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C HUNTITNBCH CA
2021-06-25 657-502-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C HUNTITNBCH CA
2021-06-25 657-502-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C HUNTITNBCH 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.