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
2010-10-04 858-461-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DEL MAR CA
2010-10-04 858-751-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG LVTA CA
2010-10-04 858-769-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG LVTA CA
2010-09-23 858-999-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C LA JOLLA CA
2010-09-20 858-333-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2010-09-20 858-333-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2010-09-15 858-605-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RNCHOBRNDO CA
2010-09-14 858-790-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2010-08-18 858-798-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RNCHOBRNDO CA
2010-08-18 858-888-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LA JOLLA CA
2010-08-12 858-333-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LA JOLLA CA
2010-08-03 858-367-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RNCHOSANFE CA
2010-07-22 858-888-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LA JOLLA CA
2010-07-15 858-314-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DEL MAR CA
2010-07-08 858-888-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2010-07-08 858-888-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2010-07-06 858-754-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2010-07-06 858-886-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2010-06-29 858-519-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DEL MAR CA
2010-06-29 858-705-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RNCHOBRNDO CA
2010-06-23 858-888-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LA JOLLA CA
2010-06-16 858-526-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LA JOLLA CA
2010-06-16 858-836-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2010-06-16 858-836-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J SNDG LVTA CA
2010-06-16 858-966-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2010-06-16 858-966-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2010-06-14 858-837-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RNCHOPNQTS CA
2010-06-08 858-208-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POWAY CA
2010-06-08 858-215-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RNCHOPNQTS CA
2010-06-08 858-429-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG LVTA CA
2010-06-08 858-432-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RNCHOBRNDO CA
2010-06-08 858-437-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG MRMS CA
2010-06-08 858-869-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LA JOLLA CA
2010-06-01 858-699-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2010-05-21 858-224-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2010-05-17 858-863-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNDG MRMS CA
2010-04-19 858-617-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2010-03-25 858-886-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LA JOLLA CA
2010-03-12 858-737-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2010-02-24 858-224-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2010-02-24 858-367-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RNCHOSANFE CA
2010-02-11 858-224-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
2010-02-04 858-210-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2010-02-04 858-877-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2010-02-03 858-224-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LA JOLLA CA
2010-02-03 858-224-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LA JOLLA CA
2010-02-01 858-224-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LA JOLLA CA
2010-01-29 858-208-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POWAY CA
2010-01-29 858-215-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RNCHOPNQTS CA
2010-01-29 858-367-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RNCHOSANFE 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.