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
2018-05-23 323-853-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MONTEBELLO CA
2018-05-11 323-910-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2018-05-01 323-916-2XXX 2000–2999Assigned TELNYX LLC 073H LSAN DA 03 CA
2018-05-01 323-990-9XXX 9000–9999Assigned TELNYX LLC 073H LSAN DA 04 CA
2018-04-24 323-853-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H MONTEBELLO CA
2018-04-16 323-955-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2018-04-16 323-955-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2018-04-16 323-955-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2018-04-11 323-763-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 06 CA
2018-04-11 323-910-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2018-04-11 323-910-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2018-04-11 323-910-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2018-04-11 323-910-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2018-04-11 323-910-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2018-04-02 323-814-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 09 CA
2018-03-23 323-910-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2018-03-23 323-910-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2018-03-23 323-910-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2018-03-22 323-955-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 13 CA
2018-03-14 323-814-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2018-03-14 323-814-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2018-03-14 323-814-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2018-03-14 323-814-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2018-03-14 323-814-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2018-03-14 323-814-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2018-03-14 323-814-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2018-03-14 323-814-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2018-03-14 323-853-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MONTEBELLO CA
2018-03-13 323-955-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2018-03-13 323-955-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2018-03-13 323-955-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2018-03-13 323-955-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2018-03-13 323-955-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2018-03-13 323-990-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2018-03-13 323-990-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2018-03-13 323-990-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2018-03-13 323-990-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2018-03-12 323-579-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2018-03-12 323-991-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2018-03-12 323-991-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2018-03-12 323-991-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2018-03-12 323-991-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2018-03-07 323-329-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2018-03-07 323-329-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2018-03-07 323-403-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2018-03-07 323-421-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2018-03-07 323-508-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2018-03-07 323-880-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2018-03-07 323-880-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2018-03-07 323-940-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 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.