NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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
2011-01-19 323-407-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2011-01-11 323-454-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LSAN DA 02 CA
2011-01-11 323-518-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 05 CA
2011-01-11 323-648-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LSAN DA 13 CA
2011-01-11 323-648-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 13 CA
2011-01-11 323-680-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2011-01-11 323-796-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 05 CA
2011-01-11 323-989-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2010-12-28 323-879-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 13 CA
2010-12-22 323-300-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2010-12-13 323-312-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 06 CA
2010-12-13 323-775-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 06 CA
2010-12-07 323-300-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 02 CA
2010-12-07 323-345-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LSAN DA 02 CA
2010-12-07 323-345-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LSAN DA 02 CA
2010-12-03 323-250-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2010-12-03 323-364-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-12-03 323-400-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MONTEBELLO CA
2010-12-03 323-451-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2010-12-03 323-522-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2010-12-03 323-592-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2010-12-03 323-642-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2010-12-03 323-834-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2010-12-03 323-863-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2010-12-03 323-902-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 11 CA
2010-12-03 323-920-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2010-12-03 323-929-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-12-03 323-999-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2010-11-22 323-398-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 03 CA
2010-11-22 323-398-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 03 CA
2010-11-22 323-398-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 03 CA
2010-11-22 323-398-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 03 CA
2010-11-22 323-398-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 03 CA
2010-11-22 323-398-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 03 CA
2010-11-22 323-398-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 03 CA
2010-11-22 323-398-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 03 CA
2010-11-17 323-206-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 03 CA
2010-11-11 323-739-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LSAN DA 03 CA
2010-11-09 323-374-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-11-09 323-374-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-11-09 323-400-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MONTEBELLO CA
2010-11-09 323-522-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2010-11-09 323-825-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2010-11-09 323-929-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-11-09 323-929-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-11-05 323-534-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J LSAN DA 13 CA
2010-10-27 323-248-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MONTEBELLO CA
2010-10-27 323-984-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 02 CA
2010-10-21 323-320-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 02 CA
2010-10-21 323-320-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 02 CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.