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
2014-08-21 323-905-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2014-08-21 323-905-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2014-08-21 323-942-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2014-08-14 323-553-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 06 CA
2014-08-14 323-745-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 14 CA
2014-08-01 323-902-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 11 CA
2014-07-30 323-455-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 09 CA
2014-07-28 323-536-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 14 CA
2014-07-28 323-553-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2014-07-28 323-553-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2014-07-28 323-553-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2014-07-28 323-553-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2014-07-24 323-745-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 14 CA
2014-07-24 323-746-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 13 CA
2014-07-24 323-987-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 04 CA
2014-07-22 323-348-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2014-07-22 323-792-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2014-07-22 323-815-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2014-07-21 323-457-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2014-07-21 323-457-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2014-07-21 323-457-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2014-07-21 323-457-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2014-07-21 323-457-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2014-07-21 323-457-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2014-07-21 323-539-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2014-07-21 323-539-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2014-07-21 323-539-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2014-07-21 323-686-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2014-07-21 323-686-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2014-07-21 323-909-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2014-07-09 323-649-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2014-07-03 323-746-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 13 CA
2014-07-01 323-531-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 09 CA
2014-06-24 323-745-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2014-06-24 323-745-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2014-06-24 323-745-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2014-06-16 323-673-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LSAN DA 03 CA
2014-06-10 323-475-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2014-06-10 323-475-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2014-06-10 323-475-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2014-06-06 323-746-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 13 CA
2014-06-04 323-745-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 14 CA
2014-05-30 323-621-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2014-05-30 323-621-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2014-05-28 323-457-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2014-05-20 323-745-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2014-05-19 323-405-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2014-05-19 323-405-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2014-05-19 323-441-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2014-05-19 323-505-2XXX 2000–2999Assigned 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.