NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

17 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 650
ONVOY, LLC - CA 11
T-MOBILE USA, INC. 4
BANDWIDTH.COM CLEC, LLC - CA 2
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
2011-05-27 650-560-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HALFMOONBY CA
2011-05-27 650-642-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN MATEO CA
2011-05-25 650-315-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2011-05-25 650-350-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2011-05-25 650-646-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2011-05-09 650-350-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2011-05-09 650-350-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2011-05-06 650-503-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E REDWOOD CY CA
2011-05-06 650-503-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E REDWOOD CY CA
2011-05-06 650-503-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E REDWOOD CY CA
2011-05-06 650-622-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCRL-BLMT CA
2011-05-04 650-241-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDWOOD CY CA
2011-04-27 650-223-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PALO ALTO CA
2011-04-27 650-242-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN MATEO CA
2011-04-27 650-273-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SSNFRNCSCO CA
2011-04-27 650-308-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PALO ALTO CA
2011-04-27 650-308-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PALO ALTO CA
2011-04-27 650-308-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PALO ALTO CA
2011-04-27 650-397-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LOS ALTOS CA
2011-04-27 650-397-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LOS ALTOS CA
2011-04-27 650-416-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SSNFRNCSCO CA
2011-04-27 650-417-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MT VIEW CA
2011-04-27 650-429-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MT VIEW CA
2011-04-27 650-434-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WOODSIDE CA
2011-04-27 650-434-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WOODSIDE CA
2011-04-27 650-468-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PALO ALTO CA
2011-04-27 650-532-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN MATEO CA
2011-04-27 650-532-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN MATEO CA
2011-04-27 650-561-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PALO ALTO CA
2011-04-27 650-564-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MT VIEW CA
2011-04-27 650-564-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MT VIEW CA
2011-04-27 650-741-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SSNFRNCSCO CA
2011-04-27 650-933-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MT VIEW CA
2011-04-27 650-933-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MT VIEW CA
2011-04-20 650-308-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PALO ALTO CA
2011-04-20 650-384-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PALO ALTO CA
2011-04-14 650-425-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SAN MATEO CA
2011-04-12 650-808-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SSNFRNCSCO CA
2011-04-12 650-808-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SSNFRNCSCO CA
2011-04-08 650-223-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2011-04-08 650-554-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2011-04-08 650-554-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2011-03-30 650-308-5XXX 5000–5999Assigned METROPCS, INC. 5562 PALO ALTO CA
2011-03-30 650-385-1XXX 1000–1999Assigned METROPCS, INC. 5562 REDWOOD CY CA
2011-03-30 650-984-0XXX 0000–0999Assigned METROPCS, INC. 5562 PACIFICA CA
2011-03-24 650-556-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDWOOD CY CA
2011-03-24 650-556-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDWOOD CY CA
2011-03-22 650-257-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E REDWOOD CY CA
2011-03-22 650-735-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PACIFICA CA
2011-03-22 650-918-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN MATEO 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.