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
2016-07-22 323-530-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2016-07-22 323-530-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2016-07-22 323-530-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2016-07-22 323-530-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2016-07-22 323-607-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2016-07-22 323-607-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2016-07-22 323-607-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2016-07-22 323-607-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2016-07-22 323-607-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2016-07-22 323-607-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2016-07-22 323-607-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2016-07-22 323-607-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2016-07-19 323-539-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2016-07-19 323-986-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LSAN DA 04 CA
2016-07-19 323-986-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LSAN DA 04 CA
2016-07-15 323-961-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-07-15 323-961-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-07-15 323-961-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-07-15 323-961-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-07-11 323-713-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 09 CA
2016-07-07 323-347-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 12 CA
2016-07-07 323-504-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2016-07-07 323-705-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2016-07-07 323-705-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2016-07-06 323-406-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 05 CA
2016-07-01 323-917-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2016-07-01 323-917-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2016-07-01 323-917-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2016-07-01 323-917-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2016-07-01 323-917-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2016-06-27 323-612-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2016-06-27 323-612-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2016-06-27 323-612-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2016-06-27 323-612-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2016-06-27 323-612-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2016-06-27 323-765-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MONTEBELLO CA
2016-06-27 323-765-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MONTEBELLO CA
2016-06-24 323-329-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2016-06-24 323-471-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2016-06-24 323-507-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2016-06-23 323-607-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2016-06-23 323-607-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2016-06-23 323-618-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2016-06-23 323-618-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2016-06-23 323-689-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2016-06-21 323-471-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2016-06-21 323-471-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2016-06-21 323-716-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 11 CA
2016-06-21 323-716-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 11 CA
2016-06-21 323-749-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 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.