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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2007-11-27 858-863-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG MRMS CA
2007-11-13 858-246-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 LA JOLLA CA
2007-11-13 858-246-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 LA JOLLA CA
2007-11-09 858-246-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2007-11-09 858-246-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2007-11-07 858-997-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2007-10-26 858-207-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RNCHOBRNDO CA
2007-10-23 858-997-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2007-10-17 858-997-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2007-09-27 858-947-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DEL MAR CA
2007-09-26 858-768-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2007-09-18 858-412-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2007-09-17 858-776-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RNCHOBRNDO CA
2007-09-17 858-863-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2007-09-07 858-750-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2007-09-07 858-768-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2007-09-06 858-521-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOBRNDO CA
2007-09-06 858-521-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOBRNDO CA
2007-09-06 858-652-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2007-08-31 858-461-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K DEL MAR CA
2007-08-31 858-461-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K DEL MAR CA
2007-08-23 858-564-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG MRMS CA
2007-08-23 858-564-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG MRMS CA
2007-08-21 858-397-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNDG MRMS CA
2007-08-20 858-997-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2007-08-20 858-997-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2007-08-20 858-997-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2007-08-10 858-805-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2007-08-10 858-805-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2007-07-23 858-461-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 DEL MAR CA
2007-07-17 858-436-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L DEL MAR CA
2007-07-16 858-537-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNDG MRMS CA
2007-07-11 858-348-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG MRMS CA
2007-07-10 858-412-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2007-07-05 858-568-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2007-07-03 858-246-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 LA JOLLA CA
2007-07-03 858-246-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 LA JOLLA CA
2007-07-03 858-246-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 LA JOLLA CA
2007-07-03 858-246-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 LA JOLLA CA
2007-07-03 858-246-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 LA JOLLA CA
2007-07-03 858-246-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 LA JOLLA CA
2007-06-29 858-412-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2007-06-29 858-412-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2007-06-21 858-436-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2007-06-21 858-633-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG LVTA CA
2007-06-19 858-412-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C LA JOLLA CA
2007-06-15 858-832-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RNCHOSANFE CA
2007-05-29 858-634-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2007-05-29 858-634-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2007-05-14 858-386-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 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.