NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

1 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 323
ONVOY, 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
2011-11-15 323-391-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2011-11-15 323-391-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2011-11-15 323-426-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2011-11-15 323-426-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2011-11-11 323-373-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 11 CA
2011-10-21 323-647-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 05 CA
2011-10-21 323-647-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 05 CA
2011-10-21 323-647-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 05 CA
2011-10-10 323-427-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2011-10-10 323-427-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2011-10-10 323-427-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2011-10-10 323-427-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2011-09-22 323-947-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MONTEBELLO CA
2011-09-16 323-435-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 06 CA
2011-09-13 323-509-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2011-09-13 323-677-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2011-09-13 323-709-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 11 CA
2011-08-23 323-248-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MONTEBELLO CA
2011-08-23 323-400-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2011-08-23 323-509-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2011-08-23 323-516-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2011-08-23 323-516-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2011-08-23 323-516-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2011-08-23 323-529-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2011-08-23 323-558-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2011-08-23 323-677-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2011-08-23 323-709-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 11 CA
2011-08-23 323-800-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 05 CA
2011-08-09 323-473-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 02 CA
2011-08-05 323-400-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2011-08-05 323-400-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2011-08-05 323-987-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 04 CA
2011-08-01 323-250-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2011-08-01 323-250-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2011-08-01 323-250-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2011-08-01 323-366-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2011-08-01 323-380-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2011-08-01 323-435-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2011-08-01 323-435-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2011-07-28 323-488-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2011-07-28 323-488-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2011-07-28 323-488-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2011-07-28 323-509-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LSAN DA 03 CA
2011-07-27 323-546-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 08 CA
2011-07-22 323-800-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LSAN DA 05 CA
2011-07-15 323-366-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2011-07-15 323-426-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2011-07-15 323-426-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2011-07-15 323-426-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2011-07-15 323-426-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 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.