NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

17 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2015-12-01 650-457-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2015-12-01 650-457-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2015-11-24 650-241-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDWOOD CY CA
2015-11-24 650-436-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN MATEO CA
2015-11-24 650-495-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MT VIEW CA
2015-11-24 650-495-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MT VIEW CA
2015-11-24 650-546-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2015-11-18 650-535-5XXX 5000–5999Assigned SONIC TELECOM, LLC - CA 433E MOSS BEACH CA
2015-11-12 650-660-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2015-11-12 650-660-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2015-11-12 650-660-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2015-11-12 650-660-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2015-11-12 650-713-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2015-11-09 650-457-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SSNFRNCSCO CA
2015-10-30 650-457-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SSNFRNCSCO CA
2015-10-29 650-209-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LOS ALTOS CA
2015-10-29 650-397-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LOS ALTOS CA
2015-10-29 650-518-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LOS ALTOS CA
2015-10-29 650-546-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PALO ALTO CA
2015-10-29 650-559-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LOS ALTOS CA
2015-10-29 650-935-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LOS ALTOS CA
2015-10-29 650-935-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LOS ALTOS CA
2015-10-27 650-457-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2015-10-21 650-546-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2015-10-20 650-797-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2015-10-20 650-797-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2015-10-01 650-206-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WOODSIDE CA
2015-10-01 650-495-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MT VIEW CA
2015-10-01 650-942-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MILLBRAE CA
2015-09-29 650-797-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2015-09-29 650-797-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2015-09-22 650-436-0XXX 0000–0999Assigned IP HORIZON LLC 515J SAN MATEO CA
2015-09-22 650-495-1XXX 1000–1999Assigned IP HORIZON LLC 515J MT VIEW CA
2015-09-22 650-546-0XXX 0000–0999Assigned IP HORIZON LLC 515J PALO ALTO CA
2015-09-17 650-797-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
2015-09-15 650-441-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2015-09-15 650-441-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2015-09-15 650-441-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2015-09-15 650-441-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2015-09-15 650-441-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2015-09-15 650-546-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2015-09-11 650-431-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SAN MATEO CA
2015-09-11 650-431-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SAN MATEO CA
2015-09-10 650-441-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2015-09-10 650-546-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PALO ALTO CA
2015-09-08 650-436-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
2015-09-08 650-436-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
2015-09-04 650-441-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2015-09-03 650-495-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MT VIEW CA
2015-09-03 650-822-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.