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
2019-06-21 657-385-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BUENA PARK CA
2019-06-20 657-386-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-06-20 657-386-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-06-20 657-386-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-06-20 657-386-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-06-20 657-386-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-06-20 657-386-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-06-20 657-386-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-06-20 657-386-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-06-20 657-386-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-06-20 657-386-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-06-19 657-373-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PLACENTIA CA
2019-06-19 657-722-2XXX 2000–2999Assigned FRACTEL, LLC 965H GARDEN GRV CA
2019-06-14 657-282-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ORANGE CA
2019-06-14 657-384-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 WESTMINSTR CA
2019-06-11 657-877-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HUNTITNBCH CA
2019-06-10 657-385-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BUENA PARK CA
2019-05-28 657-384-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WESTMINSTR CA
2019-05-28 657-384-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WESTMINSTR CA
2019-05-28 657-384-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WESTMINSTR CA
2019-05-28 657-384-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WESTMINSTR CA
2019-05-24 657-722-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 GARDEN GRV CA
2019-05-23 657-366-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F YORBALINDA CA
2019-05-21 657-382-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-05-21 657-382-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-05-21 657-382-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-05-21 657-382-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-05-21 657-382-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-05-21 657-382-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-05-21 657-382-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-05-21 657-382-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-05-21 657-382-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-05-21 657-382-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-05-21 657-402-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-05-21 657-402-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-05-21 657-402-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-05-21 657-402-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-05-21 657-402-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-05-21 657-402-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-05-21 657-402-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-05-21 657-402-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-05-21 657-402-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-05-21 657-402-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-05-20 657-660-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SANTA ANA CA
2019-05-20 657-660-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SANTA ANA CA
2019-05-20 657-660-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SANTA ANA CA
2019-05-20 657-660-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SANTA ANA CA
2019-05-20 657-877-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2019-05-14 657-732-5XXX 5000–5999Assigned FRACTEL, LLC 965H SILVERADO CA
2019-05-14 657-758-6XXX 6000–6999Assigned FRACTEL, LLC 965H ANAHEIM 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.