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
2013-10-01 323-352-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2013-10-01 323-531-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 09 CA
2013-10-01 323-609-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2013-10-01 323-657-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2013-10-01 323-813-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2013-10-01 323-909-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2013-10-01 323-985-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2013-09-25 323-275-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J LSAN DA 04 CA
2013-09-23 323-536-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2013-09-13 323-536-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2013-09-13 323-709-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2013-09-13 323-709-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2013-09-13 323-927-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2013-09-13 323-927-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2013-09-13 323-927-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2013-09-13 323-927-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2013-09-13 323-998-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2013-09-13 323-998-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2013-09-13 323-998-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2013-09-13 323-998-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2013-08-23 323-336-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LSAN DA 09 CA
2013-08-23 323-421-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LSAN DA 12 CA
2013-08-23 323-489-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LSAN DA 02 CA
2013-08-23 323-916-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C LSAN DA 03 CA
2013-08-23 323-927-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2013-08-23 323-963-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LSAN DA 14 CA
2013-08-23 323-985-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LSAN DA 08 CA
2013-08-23 323-987-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LSAN DA 04 CA
2013-08-05 323-852-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 LSAN DA 13 CA
2013-08-02 323-489-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2013-08-02 323-489-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2013-08-02 323-714-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2013-07-25 323-825-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 05 CA
2013-07-25 323-940-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 04 CA
2013-07-17 323-498-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 14 CA
2013-07-16 323-210-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2013-07-16 323-805-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2013-07-15 323-714-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2013-07-10 323-992-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 09 CA
2013-06-13 323-484-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 06 CA
2013-06-13 323-536-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 14 CA
2013-06-12 323-826-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LSAN DA 06 CA
2013-06-11 323-591-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 13 CA
2013-06-11 323-815-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 12 CA
2013-06-07 323-498-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 14 CA
2013-05-28 323-747-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 03 CA
2013-05-28 323-992-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 09 CA
2013-05-24 323-375-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 02 CA
2013-05-17 323-498-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2013-05-08 323-332-9XXX 9000–9999Assigned 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.