NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2019-07-29 323-639-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2019-07-29 323-641-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2019-07-29 323-678-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2019-07-29 323-754-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2019-07-29 323-755-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2019-07-29 323-776-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2019-07-15 323-796-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2019-06-14 323-676-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2019-06-11 323-831-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 05 CA
2019-06-06 323-949-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2019-06-06 323-949-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2019-05-17 323-616-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2019-05-17 323-673-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2019-05-01 323-207-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2019-05-01 323-524-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2019-05-01 323-609-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2019-05-01 323-991-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2019-04-29 323-649-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 11 CA
2019-03-19 323-949-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2019-03-19 323-949-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2019-03-13 323-760-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2019-03-01 323-507-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 03 CA
2019-02-27 323-622-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C MONTEBELLO CA
2019-02-27 323-765-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C MONTEBELLO CA
2019-02-27 323-968-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LSAN DA 05 CA
2019-02-27 323-968-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LSAN DA 05 CA
2019-02-27 323-968-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LSAN DA 05 CA
2019-02-27 323-968-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LSAN DA 05 CA
2019-02-27 323-990-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LSAN DA 04 CA
2019-02-27 323-990-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LSAN DA 04 CA
2019-02-27 323-990-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 04 CA
2019-02-14 323-741-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2019-01-31 323-990-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 04 CA
2019-01-28 323-622-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2019-01-28 323-890-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2019-01-22 323-760-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 14 CA
2019-01-11 323-433-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2019-01-11 323-922-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2019-01-11 323-970-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2019-01-11 323-970-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2019-01-11 323-970-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2019-01-11 323-970-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2018-12-26 323-300-2XXX 2000–2999Assigned TELNYX LLC 073H LSAN DA 02 CA
2018-12-05 323-805-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2018-11-30 323-250-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C LSAN DA 04 CA
2018-11-30 323-334-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2018-11-30 323-347-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LSAN DA 12 CA
2018-11-30 323-366-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LSAN DA 14 CA
2018-11-30 323-366-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LSAN DA 14 CA
2018-11-30 323-402-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.