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
2016-11-28 323-986-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2016-11-22 323-218-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LSAN DA 13 CA
2016-11-22 323-689-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LSAN DA 08 CA
2016-11-22 323-831-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LSAN DA 05 CA
2016-11-22 323-831-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 05 CA
2016-11-21 323-853-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MONTEBELLO CA
2016-11-21 323-996-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 06 CA
2016-11-14 323-202-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 13 CA
2016-11-14 323-831-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 05 CA
2016-11-14 323-994-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2016-11-14 323-999-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 03 CA
2016-11-08 323-961-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-11-08 323-961-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-11-08 323-961-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-11-08 323-961-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-11-08 323-961-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-11-04 323-381-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2016-11-04 323-403-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2016-11-01 323-674-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2016-11-01 323-705-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2016-11-01 323-705-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2016-10-28 323-986-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 04 CA
2016-10-18 323-831-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-10-14 323-488-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-10-14 323-530-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2016-10-14 323-530-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2016-10-14 323-604-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-10-14 323-796-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-10-14 323-859-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-10-05 323-986-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2016-10-05 323-986-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2016-09-30 323-628-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2016-09-30 323-628-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2016-09-30 323-628-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2016-09-30 323-628-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2016-09-30 323-628-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2016-09-30 323-628-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2016-09-30 323-628-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2016-09-30 323-628-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2016-09-26 323-421-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2016-09-26 323-499-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2016-09-26 323-545-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2016-09-26 323-836-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2016-09-26 323-925-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-09-26 323-925-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-09-22 323-509-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-09-22 323-509-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-09-22 323-713-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-09-22 323-713-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-09-22 323-713-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 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.