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
2012-03-06 323-852-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 13 CA
2012-03-06 323-944-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2012-03-02 323-458-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2012-03-02 323-458-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2012-02-29 323-456-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2012-02-29 323-801-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2012-02-28 323-358-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2012-02-28 323-358-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2012-02-28 323-358-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2012-02-21 323-358-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2012-02-21 323-358-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2012-02-21 323-473-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2012-02-15 323-380-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 14 CA
2012-02-15 323-426-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 02 CA
2012-02-15 323-451-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 09 CA
2012-02-08 323-287-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2012-02-08 323-892-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2012-02-07 323-412-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2012-02-03 323-546-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2012-02-01 323-358-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MONTEBELLO CA
2012-02-01 323-505-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 04 CA
2012-02-01 323-546-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 08 CA
2012-01-26 323-352-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2012-01-26 323-380-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2012-01-26 323-380-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2012-01-26 323-380-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2012-01-26 323-412-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2012-01-26 323-425-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2012-01-26 323-425-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2012-01-26 323-438-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2012-01-26 323-892-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2012-01-24 323-546-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2012-01-24 323-546-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2012-01-24 323-609-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2012-01-24 323-609-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2011-12-27 323-358-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2011-12-27 323-358-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2011-12-21 323-693-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2011-12-15 323-677-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 13 CA
2011-12-15 323-800-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 05 CA
2011-12-13 323-380-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 14 CA
2011-12-13 323-438-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2011-12-13 323-879-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 13 CA
2011-12-07 323-645-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 14 CA
2011-11-21 323-438-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2011-11-16 323-379-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2011-11-16 323-379-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2011-11-16 323-435-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2011-11-15 323-379-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2011-11-15 323-379-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 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.