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
2007-10-29 650-434-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WOODSIDE CA
2007-10-25 650-288-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2007-10-25 650-918-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2007-10-25 650-918-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2007-10-24 650-731-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC JUNPR CA
2007-10-23 650-995-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDWOOD CY CA
2007-10-17 650-466-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2007-09-27 650-454-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDWOOD CY CA
2007-09-26 650-257-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L REDWOOD CY CA
2007-09-26 650-265-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MT VIEW CA
2007-09-26 650-488-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2007-09-17 650-391-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PALO ALTO CA
2007-09-17 650-833-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2007-09-17 650-833-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2007-09-13 650-249-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDWOOD CY CA
2007-09-13 650-417-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
2007-09-13 650-417-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
2007-09-13 650-488-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2007-09-13 650-676-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SSNFRNCSCO CA
2007-09-13 650-676-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SSNFRNCSCO CA
2007-09-11 650-450-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MT VIEW CA
2007-09-11 650-450-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MT VIEW CA
2007-09-07 650-488-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2007-08-22 650-492-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LOS ALTOS CA
2007-08-14 650-450-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MT VIEW CA
2007-08-14 650-521-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PALO ALTO CA
2007-08-10 650-288-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2007-08-10 650-288-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2007-08-10 650-815-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2007-08-09 650-935-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C LOS ALTOS CA
2007-08-06 650-265-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MT VIEW CA
2007-08-02 650-284-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2007-07-18 650-488-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2007-07-03 650-293-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SAN MATEO CA
2007-06-29 650-722-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDWOOD CY CA
2007-06-29 650-722-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDWOOD CY CA
2007-06-29 650-739-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C PALO ALTO CA
2007-06-21 650-488-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2007-06-14 650-397-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 LOS ALTOS CA
2007-06-14 650-636-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SSNFRNCSCO CA
2007-06-12 650-248-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO CA
2007-06-08 650-283-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2007-05-21 650-488-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2007-05-18 650-561-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PALO ALTO CA
2007-05-18 650-561-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PALO ALTO CA
2007-05-16 650-399-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 REDWOOD CY CA
2007-05-16 650-454-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 REDWOOD CY CA
2007-05-16 650-454-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 REDWOOD CY CA
2007-05-16 650-454-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 REDWOOD CY CA
2007-05-15 650-267-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SSNFRNCSCO 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.