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
2011-12-22 858-877-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG MRMS CA
2011-12-19 858-762-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 POWAY CA
2011-12-16 858-634-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG LVTA CA
2011-11-30 858-914-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RNCHOSANFE CA
2011-11-21 858-432-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RNCHOBRNDO CA
2011-11-21 858-529-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
2011-11-21 858-704-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L DEL MAR CA
2011-11-14 858-230-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2011-11-02 858-529-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LA JOLLA CA
2011-11-02 858-529-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C LA JOLLA CA
2011-10-26 858-230-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2011-10-26 858-230-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2011-10-21 858-386-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 POWAY CA
2011-10-20 858-999-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2011-10-19 858-956-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POWAY CA
2011-09-30 858-201-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNDG MRMS CA
2011-09-30 858-800-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SNDG MRMS CA
2011-09-30 858-800-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNDG MRMS CA
2011-09-30 858-925-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K DEL MAR CA
2011-09-19 858-230-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2011-09-19 858-230-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2011-09-09 858-242-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2011-09-09 858-242-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LA JOLLA CA
2011-09-09 858-348-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNDG MRMS CA
2011-09-09 858-683-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C RNCHOBRNDO CA
2011-09-09 858-703-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C DEL MAR CA
2011-09-09 858-707-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2011-09-09 858-842-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C POWAY CA
2011-09-02 858-925-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 DEL MAR CA
2011-08-30 858-242-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J LA JOLLA CA
2011-08-25 858-375-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 POWAY CA
2011-08-25 858-914-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RNCHOSANFE CA
2011-08-24 858-925-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2011-08-23 858-230-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LA JOLLA CA
2011-08-15 858-956-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POWAY CA
2011-08-05 858-242-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2011-08-05 858-430-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG LVTA CA
2011-08-04 858-242-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
2011-07-20 858-381-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RNCHOSANFE CA
2011-07-19 858-242-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LA JOLLA CA
2011-07-19 858-391-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POWAY CA
2011-07-19 858-869-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LA JOLLA CA
2011-07-13 858-847-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DEL MAR CA
2011-07-13 858-847-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DEL MAR CA
2011-07-13 858-886-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2011-07-11 858-886-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LA JOLLA CA
2011-06-30 858-754-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LA JOLLA CA
2011-06-30 858-842-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POWAY CA
2011-06-30 858-848-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POWAY CA
2011-06-30 858-848-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POWAY 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.