NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

25 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 858
ONVOY, LLC - CA 20
EXIANT COMMUNICATIONS LLC 2
PEERLESS NETWORK OF CALIFORNIA, LLC - CA 1
NEW CINGULAR WIRELESS PCS, LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 1
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
2013-06-06 858-914-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RNCHOSANFE CA
2013-06-06 858-925-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 DEL MAR CA
2013-05-28 858-256-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG LVTA CA
2013-05-28 858-263-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2013-05-28 858-529-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LA JOLLA CA
2013-05-28 858-799-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2013-05-28 858-877-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG MRMS CA
2013-05-28 858-900-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LA JOLLA CA
2013-05-10 858-256-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG LVTA CA
2013-04-29 858-263-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
2013-04-22 858-256-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG LVTA CA
2013-04-22 858-263-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2013-04-22 858-324-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOPNQTS CA
2013-04-22 858-369-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K DEL MAR CA
2013-04-22 858-649-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOBRNDO CA
2013-04-22 858-771-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOSANFE CA
2013-04-22 858-800-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG MRMS CA
2013-04-22 858-883-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K POWAY CA
2013-04-09 858-256-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG LVTA CA
2013-04-09 858-256-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG LVTA CA
2013-04-09 858-256-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG LVTA CA
2013-04-05 858-668-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 POWAY CA
2013-03-14 858-731-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2013-03-14 858-754-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2013-03-11 858-256-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2013-03-11 858-348-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNDG MRMS CA
2013-03-11 858-348-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNDG MRMS CA
2013-03-11 858-434-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RNCHOPNQTS CA
2013-03-11 858-434-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RNCHOPNQTS CA
2013-03-11 858-832-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RNCHOSANFE CA
2013-03-11 858-832-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RNCHOSANFE CA
2013-03-11 858-939-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNDG LVTA CA
2013-03-08 858-666-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LA JOLLA CA
2013-03-08 858-666-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LA JOLLA CA
2013-03-08 858-703-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DEL MAR CA
2013-03-08 858-703-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DEL MAR CA
2013-03-08 858-746-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F POWAY CA
2013-03-08 858-746-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F POWAY CA
2013-03-08 858-753-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RNCHOBRNDO CA
2013-03-08 858-753-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RNCHOBRNDO CA
2013-02-22 858-860-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2013-02-22 858-860-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2013-02-22 858-860-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2013-02-20 858-240-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C RNCHOPNQTS CA
2013-02-20 858-771-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C RNCHOSANFE CA
2013-02-15 858-666-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2013-02-15 858-666-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2013-02-11 858-753-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RNCHOBRNDO CA
2013-02-08 858-707-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SNDG LVTA CA
2013-02-05 858-666-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J LA JOLLA 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.