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
2018-03-05 323-818-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2018-03-05 323-818-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2018-03-05 323-818-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2018-03-05 323-918-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2018-03-05 323-918-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2018-03-05 323-918-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2018-03-05 323-925-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2018-03-05 323-925-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2018-02-02 323-530-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MONTEBELLO CA
2018-01-05 323-370-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C LSAN DA 13 CA
2018-01-05 323-370-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LSAN DA 13 CA
2017-12-15 323-368-0XXX 0000–0999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 08 CA
2017-12-12 323-444-0XXX 0000–0999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 06 CA
2017-12-12 323-444-1XXX 1000–1999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 06 CA
2017-12-12 323-444-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 06 CA
2017-12-12 323-444-3XXX 3000–3999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 06 CA
2017-12-12 323-918-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 08 CA
2017-12-11 323-763-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 06 CA
2017-12-07 323-530-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C MONTEBELLO CA
2017-12-07 323-530-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C MONTEBELLO CA
2017-12-05 323-763-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2017-12-05 323-763-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2017-12-05 323-763-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2017-12-05 323-763-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2017-11-30 323-368-1XXX 1000–1999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 08 CA
2017-11-30 323-368-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 08 CA
2017-11-30 323-368-3XXX 3000–3999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 08 CA
2017-11-30 323-368-9XXX 9000–9999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 08 CA
2017-11-30 323-885-1XXX 1000–1999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 03 CA
2017-11-30 323-885-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 03 CA
2017-11-30 323-885-3XXX 3000–3999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 03 CA
2017-11-30 323-885-6XXX 6000–6999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 03 CA
2017-11-30 323-995-1XXX 1000–1999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 13 CA
2017-11-27 323-763-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2017-11-27 323-763-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2017-11-21 323-940-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LSAN DA 04 CA
2017-11-21 323-940-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LSAN DA 04 CA
2017-11-15 323-639-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2017-11-15 323-639-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C LSAN DA 11 CA
2017-11-13 323-305-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 09 CA
2017-11-13 323-347-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LSAN DA 12 CA
2017-11-13 323-403-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LSAN DA 12 CA
2017-11-01 323-508-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 12 CA
2017-11-01 323-940-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 04 CA
2017-10-20 323-818-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 03 CA
2017-10-18 323-918-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LSAN DA 08 CA
2017-10-18 323-918-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LSAN DA 08 CA
2017-10-18 323-918-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LSAN DA 08 CA
2017-10-13 323-302-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2017-10-13 323-302-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 13 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.