NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

31 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2020-07-23 657-946-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2020-07-23 657-946-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2020-07-23 657-946-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2020-07-23 657-946-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2020-07-23 657-946-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2020-07-23 657-946-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2020-07-23 657-946-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2020-07-23 657-946-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2020-07-21 657-464-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-07-21 657-867-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-07-21 657-867-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-07-21 657-867-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-07-21 657-867-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-07-21 657-867-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-07-21 657-867-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-07-21 657-867-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-07-21 657-867-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-07-21 657-867-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-07-16 657-427-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 GARDEN GRV CA
2020-07-16 657-439-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C ANAHEIM CA
2020-07-16 657-439-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C ANAHEIM CA
2020-07-16 657-439-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C ANAHEIM CA
2020-07-16 657-439-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C ANAHEIM CA
2020-07-16 657-439-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C ANAHEIM CA
2020-07-10 657-786-7XXX 7000–7999Assigned FRACTEL, LLC 965H SANTA ANA CA
2020-07-10 657-799-9XXX 9000–9999Assigned FRACTEL, LLC 965H FULLERTON CA
2020-07-10 657-842-5XXX 5000–5999Assigned FRACTEL, LLC 965H ANAHEIM CA
2020-07-10 657-867-5XXX 5000–5999Assigned FRACTEL, LLC 965H HUNTITNBCH CA
2020-07-10 657-946-3XXX 3000–3999Assigned FRACTEL, LLC 965H SILVERADO CA
2020-07-08 657-213-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D CYPRESS CA
2020-07-02 657-438-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2020-07-02 657-438-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2020-07-02 657-438-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2020-07-02 657-677-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2020-07-02 657-677-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2020-07-02 657-677-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2020-06-30 657-446-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-06-30 657-446-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-06-30 657-446-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-06-30 657-446-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-06-30 657-446-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-06-30 657-446-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-06-30 657-446-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-06-30 657-446-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-06-30 657-446-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-06-26 657-395-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E YORBALINDA CA
2020-06-26 657-655-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-06-26 657-655-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-06-26 657-655-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-06-23 657-443-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WESTMINSTR CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.