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
2016-10-07 530-250-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUSANVILLE CA
2016-10-03 530-551-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ANDERSON CA
2016-10-03 530-551-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ANDERSON CA
2016-10-03 530-551-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ANDERSON CA
2016-10-03 530-786-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUBN MAIN CA
2016-09-29 530-441-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MARYSVILLE CA
2016-09-22 530-762-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PARADISE CA
2016-09-21 530-386-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TRUCKEE CA
2016-09-20 530-551-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANDERSON CA
2016-09-16 530-212-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WINTERS CA
2016-09-13 530-650-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 WOODLAND CA
2016-09-13 530-786-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F AUBN MAIN CA
2016-08-30 530-427-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SODA SPG CA
2016-08-29 530-293-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PLVL KYBRZ CA
2016-08-29 530-556-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SHINGLESPG CA
2016-08-24 530-443-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MARYSVILLE CA
2016-08-23 530-648-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F GRVY MAIN CA
2016-08-22 530-220-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DAVIS CA
2016-08-22 530-537-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E AUBN MAIN CA
2016-08-18 530-955-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NEVADACITY CA
2016-08-17 530-551-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ANDERSON CA
2016-08-17 530-803-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E COTTONWOOD CA
2016-08-17 530-900-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORNING CA
2016-08-17 530-924-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHICO CA
2016-08-16 530-447-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ALLEGHANY CA
2016-08-15 530-567-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RED BLUFF CA
2016-08-15 530-761-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DAVIS CA
2016-08-10 530-317-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLVL WEST CA
2016-08-10 530-441-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MARYSVILLE CA
2016-08-10 530-441-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MARYSVILLE CA
2016-08-10 530-539-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SOUTHTAHOE CA
2016-08-10 530-556-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SHINGLESPG CA
2016-08-10 530-648-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E GRVY MAIN CA
2016-08-03 530-806-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDDING CA
2016-08-03 530-806-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDDING CA
2016-08-02 530-551-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ANDERSON CA
2016-08-02 530-551-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ANDERSON CA
2016-08-02 530-551-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ANDERSON CA
2016-07-29 530-761-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DAVIS CA
2016-07-26 530-317-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLVL WEST CA
2016-07-26 530-715-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHICO CA
2016-07-22 530-764-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OROVILLE CA
2016-07-20 530-441-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MARYSVILLE CA
2016-07-15 530-441-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MARYSVILLE CA
2016-07-13 530-806-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 REDDING CA
2016-07-13 530-806-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 REDDING CA
2016-07-05 530-631-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WOODLAND CA
2016-07-05 530-900-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CORNING CA
2016-06-28 530-807-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NTAH THCY CA
2016-06-27 530-807-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K NTAH THCY 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.