NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

24 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 530
ONVOY, LLC - CA 9
BANDWIDTH.COM CLEC, LLC - CA 6
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 4
OPENTACT INC. 3
T-MOBILE USA, INC. 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
2013-08-13 530-616-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 QUINCY CA
2013-08-09 530-341-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DAVIS CA
2013-08-09 530-574-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DAVIS CA
2013-07-30 530-360-9XXX 9000–9999Assigned METROPCS, INC. 5562 ANDERSON CA
2013-07-26 530-488-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBN MAIN CA
2013-07-25 530-444-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 GEORGETOWN CA
2013-07-22 530-558-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SHINGLESPG CA
2013-07-22 530-601-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C DAVIS CA
2013-07-16 530-384-4XXX 4000–4999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LOSMOLINOS CA
2013-07-03 530-214-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C TRUCKEE CA
2013-06-27 530-459-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MONTAGUE CA
2013-06-26 530-341-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DAVIS CA
2013-06-20 530-353-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 OROVILLE CA
2013-06-20 530-476-6XXX 6000–6999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 ARBUCKLE CA
2013-06-20 530-619-6XXX 6000–6999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 COLUSA CA
2013-06-20 530-988-4XXX 4000–4999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 ORLAND CA
2013-06-18 530-838-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CORNING CA
2013-06-13 530-338-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDDING CA
2013-06-11 530-203-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELK CREEK CA
2013-05-15 530-564-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L DAVIS CA
2013-05-15 530-802-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 GRVY MAIN CA
2013-05-14 530-250-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUSANVILLE CA
2013-05-14 530-562-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TRUCKEE CA
2013-05-10 530-338-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K REDDING CA
2013-05-03 530-491-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C MARYSVILLE CA
2013-04-24 530-331-3XXX 3000–3999Assigned SNOWCREST TELEPHONE, INC -CA 103G YREKA CA
2013-04-16 530-636-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHICO CA
2013-04-15 530-434-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MARYSVILLE CA
2013-04-15 530-434-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MARYSVILLE CA
2013-04-11 530-433-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CHICO CA
2013-04-11 530-433-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CHICO CA
2013-04-10 530-338-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E REDDING CA
2013-04-10 530-338-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E REDDING CA
2013-04-04 530-360-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANDERSON CA
2013-04-04 530-414-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TRUCKEE CA
2013-04-04 530-762-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PARADISE CA
2013-04-03 530-278-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F GRVY SOUTH CA
2013-04-03 530-418-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NORTH YUBA CA
2013-04-03 530-456-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F GRIDLEY CA
2013-04-03 530-523-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HOMEWOOD CA
2013-04-03 530-525-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HOMEWOOD CA
2013-04-03 530-584-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NTAH THCY CA
2013-04-03 530-584-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NTAH THCY CA
2013-04-03 530-652-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F GRVY SOUTH CA
2013-04-03 530-692-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NORTH YUBA CA
2013-04-03 530-797-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F GRIDLEY CA
2013-03-27 530-379-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WOODLAND CA
2013-03-22 530-324-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 WILLOW CRK CA
2013-03-22 530-379-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WOODLAND CA
2013-03-22 530-379-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WOODLAND 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.