NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

12 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 424
ONVOY, LLC - CA 10
OPENTACT INC. 1
NEW CINGULAR WIRELESS PCS, LLC 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
2017-01-10 424-399-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D TORRANCE CA
2017-01-09 424-421-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BEVERLYHLS CA
2017-01-05 424-541-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D INGLEWOOD CA
2016-12-28 424-423-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 EL SEGUNDO CA
2016-12-28 424-423-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 EL SEGUNDO CA
2016-12-28 424-423-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 EL SEGUNDO CA
2016-12-28 424-423-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 EL SEGUNDO CA
2016-12-19 424-433-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SNMN SNMN CA
2016-12-16 424-414-1XXX 1000–1999Assigned TELNYX LLC 073H INGLEWOOD CA
2016-12-07 424-433-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNMN SNMN CA
2016-12-06 424-377-3XXX 3000–3999Assigned IP HORIZON LLC 515J AVALON CA
2016-11-30 424-533-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN PEDRO CA
2016-11-21 424-399-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TORRANCE CA
2016-11-16 424-421-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C BEVERLYHLS CA
2016-11-16 424-433-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNMN SNMN CA
2016-11-16 424-433-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNMN SNMN CA
2016-11-15 424-403-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CMTN CMTN CA
2016-11-15 424-403-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CMTN CMTN CA
2016-11-14 424-397-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F EL SEGUNDO CA
2016-11-14 424-421-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BEVERLYHLS CA
2016-11-14 424-523-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CULVERCITY CA
2016-11-08 424-377-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C AVALON CA
2016-11-08 424-377-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F AVALON CA
2016-11-07 424-397-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 EL SEGUNDO CA
2016-11-02 424-403-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2016-11-01 424-541-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C INGLEWOOD CA
2016-11-01 424-567-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D HAWTHORNE CA
2016-10-24 424-225-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 EL SEGUNDO CA
2016-10-21 424-308-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SAN PEDRO CA
2016-10-21 424-380-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2016-10-21 424-380-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2016-10-21 424-402-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2016-10-14 424-388-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MALIBU CA
2016-10-05 424-567-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2016-10-05 424-567-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2016-10-04 424-366-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2016-10-04 424-366-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2016-10-04 424-366-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2016-10-04 424-366-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2016-09-30 424-222-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LOMITA CA
2016-09-28 424-397-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C EL SEGUNDO CA
2016-09-26 424-532-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2016-09-23 424-402-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K W ANGELES CA
2016-09-22 424-390-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K REDONDO CA
2016-09-21 424-421-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2016-09-21 424-567-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HAWTHORNE CA
2016-09-19 424-523-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C CULVERCITY CA
2016-09-19 424-523-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C CULVERCITY CA
2016-09-16 424-313-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2016-09-16 424-389-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS 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.