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
2011-02-26 858-216-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RNCHOPNQTS CA
2011-02-19 858-609-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG LVTA CA
2011-02-18 858-524-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J RNCHOBRNDO CA
2011-02-16 858-737-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG LVTA CA
2011-02-15 858-519-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 DEL MAR CA
2011-02-09 858-705-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RNCHOBRNDO CA
2011-02-09 858-790-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2011-02-09 858-866-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2011-02-04 858-905-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RNCHOPNQTS CA
2011-02-03 858-999-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2011-02-03 858-999-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2011-02-02 858-255-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2011-01-31 858-869-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LA JOLLA CA
2011-01-21 858-649-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RNCHOBRNDO CA
2011-01-19 858-859-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POWAY CA
2011-01-19 858-859-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POWAY CA
2011-01-18 858-810-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2011-01-14 858-999-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 LA JOLLA CA
2011-01-12 858-633-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG LVTA CA
2011-01-12 858-707-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG LVTA CA
2011-01-11 858-519-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2011-01-11 858-880-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2011-01-07 858-888-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2010-12-13 858-888-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2010-12-09 858-707-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J SNDG LVTA CA
2010-12-09 858-762-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POWAY CA
2010-11-24 858-847-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C DEL MAR CA
2010-11-22 858-333-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2010-11-22 858-888-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2010-11-19 858-333-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2010-11-18 858-215-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RNCHOPNQTS CA
2010-11-18 858-356-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DEL MAR CA
2010-11-18 858-356-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DEL MAR CA
2010-11-18 858-413-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POWAY CA
2010-11-18 858-432-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RNCHOBRNDO CA
2010-11-18 858-522-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG LVTA CA
2010-11-18 858-790-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG MRMS CA
2010-11-18 858-939-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG LVTA CA
2010-11-05 858-754-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J LA JOLLA CA
2010-11-03 858-433-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG MRMS CA
2010-10-25 858-368-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 SNDG MRMS CA
2010-10-04 858-215-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RNCHOPNQTS CA
2010-10-04 858-333-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LA JOLLA CA
2010-10-04 858-333-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LA JOLLA CA
2010-10-04 858-333-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LA JOLLA CA
2010-10-04 858-333-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LA JOLLA CA
2010-10-04 858-386-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E POWAY CA
2010-10-04 858-433-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG MRMS CA
2010-10-04 858-433-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG MRMS CA
2010-10-04 858-451-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RNCHOBRNDO 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.