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
2013-05-08 323-451-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2013-05-08 323-451-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2013-05-08 323-539-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2013-05-08 323-577-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2013-05-08 323-920-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2013-05-08 323-920-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2013-05-08 323-977-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2013-04-25 323-272-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2013-04-25 323-330-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2013-04-25 323-430-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MONTEBELLO CA
2013-04-25 323-879-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2013-04-24 323-477-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2013-04-17 323-870-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 11 CA
2013-04-16 323-498-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2013-04-10 323-596-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 12 CA
2013-04-05 323-510-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2013-04-05 323-510-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2013-04-05 323-510-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2013-04-05 323-892-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2013-04-05 323-892-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2013-04-04 323-508-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2013-03-14 323-430-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MONTEBELLO CA
2013-03-14 323-430-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MONTEBELLO CA
2013-03-14 323-486-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 02 CA
2013-03-14 323-486-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 02 CA
2013-03-14 323-538-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 06 CA
2013-03-14 323-538-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 06 CA
2013-03-14 323-642-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 12 CA
2013-03-14 323-642-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 12 CA
2013-03-14 323-870-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 11 CA
2013-03-14 323-870-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 11 CA
2013-03-14 323-977-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 09 CA
2013-03-14 323-977-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 09 CA
2013-03-12 323-430-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K MONTEBELLO CA
2013-03-12 323-486-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 02 CA
2013-03-12 323-498-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 14 CA
2013-03-12 323-498-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LSAN DA 14 CA
2013-03-12 323-498-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LSAN DA 14 CA
2013-03-12 323-538-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 06 CA
2013-03-12 323-576-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 04 CA
2013-03-12 323-591-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 13 CA
2013-03-12 323-604-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 05 CA
2013-03-12 323-815-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 12 CA
2013-03-12 323-985-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 08 CA
2013-03-12 323-998-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 11 CA
2013-03-06 323-238-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 08 CA
2013-03-06 323-540-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 03 CA
2013-03-06 323-686-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 04 CA
2013-03-01 323-498-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J LSAN DA 14 CA
2013-02-27 323-213-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C MONTEBELLO 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.