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
2009-10-12 650-204-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLBRAE CA
2009-10-12 650-241-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E REDWOOD CY CA
2009-10-12 650-241-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E REDWOOD CY CA
2009-10-12 650-275-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WOODSIDE CA
2009-10-12 650-275-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WOODSIDE CA
2009-10-12 650-479-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HALFMOONBY CA
2009-10-12 650-479-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HALFMOONBY CA
2009-10-12 650-489-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNCRL-BLMT CA
2009-10-12 650-489-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNCRL-BLMT CA
2009-10-12 650-646-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PALO ALTO CA
2009-10-12 650-646-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PALO ALTO CA
2009-10-12 650-691-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MT VIEW CA
2009-10-12 650-691-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MT VIEW CA
2009-10-12 650-733-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PACIFICA CA
2009-10-12 650-733-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PACIFICA CA
2009-10-05 650-339-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCRL-BLMT CA
2009-09-23 650-946-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LOS ALTOS CA
2009-09-21 650-485-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PALO ALTO CA
2009-09-14 650-532-1XXX 1000–1999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAN MATEO CA
2009-09-14 650-681-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PALO ALTO CA
2009-09-14 650-681-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PALO ALTO CA
2009-09-09 650-813-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PALO ALTO CA
2009-08-18 650-817-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDWOOD CY CA
2009-07-17 650-532-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SAN MATEO CA
2009-07-17 650-532-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SAN MATEO CA
2009-06-23 650-481-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDWOOD CY CA
2009-06-23 650-931-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN MATEO CA
2009-06-08 650-316-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MT VIEW CA
2009-06-04 650-231-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MILLBRAE CA
2009-05-28 650-229-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LOS ALTOS CA
2009-05-28 650-276-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2009-05-28 650-691-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MT VIEW CA
2009-05-01 650-954-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J SAN MATEO CA
2009-04-16 650-257-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J REDWOOD CY CA
2009-04-06 650-485-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J PALO ALTO CA
2009-04-06 650-528-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J MT VIEW CA
2009-04-02 650-339-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCRL-BLMT CA
2009-03-25 650-257-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L REDWOOD CY CA
2009-03-25 650-522-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAN MATEO CA
2009-03-25 650-627-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SAN MATEO CA
2009-03-12 650-481-5XXX 5000–5999Assigned METROPCS, INC. 5562 REDWOOD CY CA
2009-03-10 650-389-4XXX 4000–4999Assigned METROPCS, INC. 5562 SAN MATEO CA
2009-02-27 650-485-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PALO ALTO CA
2009-02-27 650-485-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PALO ALTO CA
2009-02-20 650-421-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDWOOD CY CA
2009-02-20 650-421-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDWOOD CY CA
2009-02-13 650-336-6XXX 6000–6999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 MT VIEW CA
2009-02-13 650-485-8XXX 8000–8999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 PALO ALTO CA
2009-02-13 650-552-8XXX 8000–8999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 MILLBRAE CA
2009-02-13 650-758-9XXX 9000–9999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SNFC JUNPR 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.