NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

24 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 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
2015-03-16 530-691-7XXX 7000–7999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 REDDING CA
2015-03-13 530-558-7XXX 7000–7999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SHINGLESPG CA
2015-03-13 530-648-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E GRVY MAIN CA
2015-03-12 530-552-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OROVILLE CA
2015-02-26 530-650-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C WOODLAND CA
2015-02-25 530-650-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WOODLAND CA
2015-02-25 530-813-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MARYSVILLE CA
2015-02-25 530-813-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MARYSVILLE CA
2015-02-25 530-813-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MARYSVILLE CA
2015-02-17 530-353-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OROVILLE CA
2015-02-17 530-497-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PLVL WEST CA
2015-02-13 530-437-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GRIMES CA
2015-02-13 530-438-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MAXWELL CA
2015-02-13 530-439-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PRINCETON CA
2015-02-13 530-473-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WILLIAMS CA
2015-02-13 530-476-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ARBUCKLE CA
2015-01-27 530-213-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 NTAH BCWY CA
2015-01-16 530-813-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MARYSVILLE CA
2015-01-14 530-760-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DAVIS CA
2014-12-26 530-567-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RED BLUFF CA
2014-12-05 530-552-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OROVILLE CA
2014-12-05 530-771-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C DAVIS CA
2014-12-05 530-771-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C DAVIS CA
2014-12-02 530-955-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L NEVADACITY CA
2014-12-01 530-539-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SOUTHTAHOE CA
2014-12-01 530-539-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SOUTHTAHOE CA
2014-12-01 530-552-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OROVILLE CA
2014-11-26 530-290-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ALLEGHANY CA
2014-11-25 530-446-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C GRVY MAIN CA
2014-11-25 530-446-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C GRVY MAIN CA
2014-11-25 530-446-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C GRVY MAIN CA
2014-11-25 530-720-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHICO CA
2014-11-25 530-720-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHICO CA
2014-11-24 530-786-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBN MAIN CA
2014-11-20 530-492-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUBN MAIN CA
2014-11-20 530-492-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBN MAIN CA
2014-11-18 530-683-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SHINGLESPG CA
2014-11-14 530-340-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YREKA CA
2014-11-13 530-446-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 GRVY MAIN CA
2014-11-13 530-693-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OROVILLE CA
2014-11-07 530-360-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANDERSON CA
2014-11-07 530-691-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDDING CA
2014-11-04 530-487-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICO CA
2014-11-04 530-487-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICO CA
2014-10-30 530-691-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E REDDING CA
2014-10-30 530-691-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E REDDING CA
2014-10-29 530-458-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COLUSA CA
2014-10-29 530-517-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BUTTE CITY CA
2014-10-27 530-564-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DAVIS CA
2014-10-27 530-564-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DAVIS 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.