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
2019-09-23 657-396-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-09-23 657-396-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-09-23 657-396-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-09-23 657-396-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-09-23 657-396-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-09-23 657-396-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-09-23 657-396-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-09-23 657-396-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-09-23 657-396-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-09-23 657-396-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-09-11 657-373-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLACENTIA CA
2019-09-11 657-373-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLACENTIA CA
2019-09-06 657-395-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YORBALINDA CA
2019-09-06 657-758-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C ANAHEIM CA
2019-09-06 657-758-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C ANAHEIM CA
2019-09-06 657-758-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C ANAHEIM CA
2019-08-26 657-392-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-08-26 657-392-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-08-26 657-392-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-08-26 657-392-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-08-26 657-392-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-08-26 657-392-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-08-26 657-392-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-08-26 657-392-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-08-26 657-392-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-08-26 657-392-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-08-26 657-394-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HUNTITNBCH CA
2019-08-26 657-394-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HUNTITNBCH CA
2019-08-26 657-394-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HUNTITNBCH CA
2019-08-22 657-391-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2019-08-15 657-238-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CYPRESS CA
2019-08-13 657-319-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C FULLERTON CA
2019-08-13 657-319-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C FULLERTON CA
2019-08-13 657-366-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C YORBALINDA CA
2019-08-13 657-366-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C YORBALINDA CA
2019-08-13 657-384-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C WESTMINSTR CA
2019-08-13 657-384-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C WESTMINSTR CA
2019-08-13 657-385-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C BUENA PARK CA
2019-08-13 657-389-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-08-13 657-389-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-08-13 657-389-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-08-13 657-389-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-08-13 657-389-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-08-13 657-389-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-08-13 657-389-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-08-13 657-389-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-08-13 657-389-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-08-13 657-389-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-08-13 657-500-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C FULLERTON CA
2019-08-13 657-500-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C FULLERTON 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.