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
2010-10-21 323-320-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 02 CA
2010-10-21 323-320-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LSAN DA 02 CA
2010-10-21 323-320-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 02 CA
2010-10-21 323-320-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 02 CA
2010-10-20 323-863-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LSAN DA 05 CA
2010-10-18 323-396-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2010-10-18 323-396-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2010-10-18 323-396-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2010-10-18 323-396-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2010-10-11 323-389-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 12 CA
2010-10-11 323-391-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 14 CA
2010-10-11 323-391-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 14 CA
2010-10-06 323-380-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2010-10-06 323-380-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2010-10-05 323-366-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2010-10-05 323-366-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2010-10-05 323-366-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2010-10-05 323-366-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2010-10-01 323-364-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-10-01 323-364-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-09-29 323-237-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-09-29 323-237-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-09-29 323-400-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MONTEBELLO CA
2010-09-29 323-400-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MONTEBELLO CA
2010-09-29 323-744-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-09-29 323-744-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-09-29 323-929-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-09-29 323-929-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-09-29 323-929-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-09-29 323-929-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2010-09-27 323-534-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2010-09-27 323-534-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2010-09-27 323-534-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2010-09-27 323-534-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2010-09-27 323-843-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 05 CA
2010-09-24 323-366-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2010-09-24 323-800-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 05 CA
2010-09-21 323-450-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 14 CA
2010-09-16 323-387-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2010-09-16 323-387-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2010-09-14 323-545-2XXX 2000–2999Assigned CONNECTTO COMMUNICATIONS, INC. - CA 863D LSAN DA 12 CA
2010-09-08 323-800-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C LSAN DA 05 CA
2010-09-02 323-218-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2010-09-02 323-250-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2010-09-02 323-508-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2010-09-02 323-647-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2010-09-02 323-739-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2010-09-02 323-902-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 11 CA
2010-09-02 323-963-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2010-09-01 323-248-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MONTEBELLO 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.