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
2015-01-08 323-834-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2015-01-08 323-891-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2015-01-08 323-891-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2015-01-08 323-891-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2015-01-08 323-891-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2015-01-08 323-891-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2015-01-06 323-593-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2015-01-06 323-738-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2015-01-06 323-738-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2015-01-06 323-738-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2015-01-06 323-738-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2015-01-06 323-738-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2015-01-06 323-738-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2015-01-06 323-738-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2015-01-06 323-891-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2015-01-06 323-891-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2015-01-06 323-891-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2014-12-26 323-675-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2014-12-26 323-675-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2014-12-26 323-675-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2014-12-26 323-675-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2014-12-23 323-738-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2014-12-23 323-738-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2014-12-23 323-738-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2014-12-23 323-796-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2014-12-23 323-796-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2014-12-23 323-891-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2014-12-23 323-891-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2014-12-23 323-943-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2014-12-23 323-943-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2014-12-22 323-597-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MONTEBELLO CA
2014-12-22 323-670-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-670-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-670-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-670-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-670-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-670-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-670-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-670-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-670-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-670-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-827-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-827-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-827-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-827-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-827-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-827-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-18 323-672-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2014-12-08 323-593-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2014-12-08 323-593-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 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.