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
2013-10-31 858-260-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J LA JOLLA CA
2013-10-31 858-260-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LA JOLLA CA
2013-10-31 858-260-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LA JOLLA CA
2013-10-30 858-365-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C RNCHOPNQTS CA
2013-10-30 858-365-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C RNCHOPNQTS CA
2013-10-30 858-465-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C DEL MAR CA
2013-10-30 858-465-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C DEL MAR CA
2013-10-30 858-771-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RNCHOSANFE CA
2013-10-30 858-771-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C RNCHOSANFE CA
2013-10-18 858-260-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2013-10-18 858-766-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2013-10-18 858-766-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2013-10-18 858-766-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2013-10-14 858-832-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RNCHOSANFE CA
2013-10-08 858-753-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RNCHOBRNDO CA
2013-09-19 858-688-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2013-09-19 858-790-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2013-09-19 858-842-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L POWAY CA
2013-09-09 858-223-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNDG LVTA CA
2013-09-09 858-223-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNDG LVTA CA
2013-09-05 858-524-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RNCHOBRNDO CA
2013-09-04 858-924-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 RNCHOBRNDO CA
2013-08-30 858-753-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RNCHOBRNDO CA
2013-08-27 858-223-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2013-08-27 858-537-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNDG MRMS CA
2013-08-27 858-956-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C POWAY CA
2013-08-22 858-924-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 RNCHOBRNDO CA
2013-08-22 858-924-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 RNCHOBRNDO CA
2013-08-22 858-924-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 RNCHOBRNDO CA
2013-08-21 858-465-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J DEL MAR CA
2013-08-21 858-790-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SNDG MRMS CA
2013-08-20 858-263-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
2013-08-20 858-375-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POWAY CA
2013-08-20 858-375-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POWAY CA
2013-08-12 858-223-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J SNDG LVTA CA
2013-07-22 858-260-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2013-07-18 858-705-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RNCHOBRNDO CA
2013-06-21 858-935-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG MRMS CA
2013-06-20 858-223-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG LVTA CA
2013-06-20 858-263-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2013-06-13 858-263-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2013-06-13 858-263-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2013-06-13 858-263-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2013-06-13 858-263-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2013-06-10 858-223-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2013-06-10 858-682-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 POWAY CA
2013-06-07 858-256-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2013-06-07 858-256-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2013-06-06 858-256-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG LVTA CA
2013-06-06 858-263-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K 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.