NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

12 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2013-11-26 424-338-2XXX 2000–2999Assigned PACIFIC BELL 9740 CMTN CMTN CA
2013-11-15 424-296-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 CMTN CMTN CA
2013-11-15 424-337-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 TORRANCE CA
2013-11-13 424-334-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 AVALON CA
2013-11-12 424-299-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNMN SNMN CA
2013-11-08 424-335-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2013-11-06 424-322-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNMN SNMN CA
2013-11-05 424-321-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C EL SEGUNDO CA
2013-11-05 424-321-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C EL SEGUNDO CA
2013-11-05 424-326-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C CULVERCITY CA
2013-11-05 424-326-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C CULVERCITY CA
2013-11-05 424-738-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C AVALON CA
2013-10-31 424-328-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LOMITA CA
2013-10-31 424-328-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LOMITA CA
2013-10-31 424-331-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C INGLEWOOD CA
2013-10-31 424-888-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C INGLEWOOD CA
2013-10-21 424-325-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J W ANGELES CA
2013-10-18 424-325-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 W ANGELES CA
2013-10-18 424-325-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 W ANGELES CA
2013-10-17 424-290-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J EL SEGUNDO CA
2013-10-11 424-264-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN PEDRO CA
2013-10-11 424-287-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SAN PEDRO CA
2013-10-11 424-289-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNMN MRVS CA
2013-10-10 424-326-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 CULVERCITY CA
2013-10-10 424-328-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LOMITA CA
2013-10-09 424-299-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNMN SNMN CA
2013-10-08 424-320-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 W ANGELES CA
2013-10-08 424-320-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 W ANGELES CA
2013-10-07 424-302-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BEVERLYHLS CA
2013-10-07 424-335-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BEVERLYHLS CA
2013-10-04 424-329-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CMTN GRDN CA
2013-10-04 424-329-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CMTN GRDN CA
2013-10-03 424-325-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F W ANGELES CA
2013-10-01 424-287-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C SAN PEDRO CA
2013-09-23 424-335-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2013-09-23 424-465-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2013-09-12 424-328-2XXX 2000–2999Assigned PACIFIC BELL 9740 LOMITA CA
2013-09-06 424-321-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 EL SEGUNDO CA
2013-09-05 424-488-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TORRANCE CA
2013-09-05 424-488-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TORRANCE CA
2013-08-26 424-488-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J TORRANCE CA
2013-08-26 424-772-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAN PEDRO CA
2013-08-23 424-329-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C CMTN GRDN CA
2013-08-22 424-335-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2013-08-21 424-331-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J INGLEWOOD CA
2013-08-14 424-302-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BEVERLYHLS CA
2013-08-14 424-329-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CMTN GRDN CA
2013-08-09 424-302-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEVERLYHLS CA
2013-08-09 424-302-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEVERLYHLS CA
2013-08-09 424-302-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEVERLYHLS CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.