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
2016-06-21 323-825-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2016-06-21 323-897-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2016-06-17 323-705-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2016-06-17 323-705-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2016-06-15 323-847-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2016-06-15 323-866-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2016-06-15 323-948-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-06-15 323-948-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-06-15 323-948-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-06-14 323-615-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-06-14 323-615-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-06-14 323-992-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-06-13 323-948-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 05 CA
2016-05-19 323-471-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2016-05-19 323-471-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2016-05-19 323-765-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2016-05-19 323-765-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2016-05-18 323-471-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 14 CA
2016-05-18 323-615-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 09 CA
2016-05-18 323-749-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 06 CA
2016-05-18 323-897-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 08 CA
2016-05-18 323-922-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 02 CA
2016-05-09 323-701-3XXX 3000–3999Assigned HD CARRIER LLC 321J LSAN DA 14 CA
2016-05-09 323-701-4XXX 4000–4999Assigned HD CARRIER LLC 321J LSAN DA 14 CA
2016-05-09 323-701-5XXX 5000–5999Assigned HD CARRIER LLC 321J LSAN DA 14 CA
2016-05-09 323-701-6XXX 6000–6999Assigned HD CARRIER LLC 321J LSAN DA 14 CA
2016-05-09 323-701-7XXX 7000–7999Assigned HD CARRIER LLC 321J LSAN DA 14 CA
2016-05-09 323-897-2XXX 2000–2999Assigned HD CARRIER LLC 321J LSAN DA 08 CA
2016-05-09 323-897-3XXX 3000–3999Assigned HD CARRIER LLC 321J LSAN DA 08 CA
2016-05-09 323-897-4XXX 4000–4999Assigned HD CARRIER LLC 321J LSAN DA 08 CA
2016-05-06 323-943-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-05-06 323-943-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-05-02 323-612-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LSAN DA 04 CA
2016-05-02 323-685-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 05 CA
2016-04-26 323-922-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2016-04-26 323-922-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2016-04-11 323-433-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 13 CA
2016-03-30 323-797-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2016-03-30 323-797-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2016-03-30 323-797-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2016-03-30 323-847-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2016-03-30 323-943-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-03-30 323-943-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-03-14 323-615-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J LSAN DA 09 CA
2016-03-09 323-362-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 05 CA
2016-03-09 323-616-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-03-09 323-616-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-03-09 323-616-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-03-08 323-765-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 MONTEBELLO CA
2016-03-04 323-613-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 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.