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
2014-03-05 424-321-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL SEGUNDO CA
2014-03-05 424-326-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CULVERCITY CA
2014-03-05 424-337-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TORRANCE CA
2014-03-03 424-299-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNMN SNMN CA
2014-02-28 424-321-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 EL SEGUNDO CA
2014-02-25 424-210-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN PEDRO CA
2014-02-25 424-210-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN PEDRO CA
2014-02-25 424-287-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN PEDRO CA
2014-02-25 424-297-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2014-02-25 424-320-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 W ANGELES CA
2014-02-25 424-328-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LOMITA CA
2014-02-25 424-328-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LOMITA CA
2014-02-25 424-337-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TORRANCE CA
2014-02-25 424-337-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TORRANCE CA
2014-02-24 424-326-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2014-02-24 424-332-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BEVERLYHLS CA
2014-02-24 424-341-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2014-02-24 424-341-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2014-02-24 424-341-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2014-02-24 424-341-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2014-02-24 424-341-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2014-02-24 424-341-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2014-02-21 424-653-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BEVERLYHLS CA
2014-02-13 424-299-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNMN SNMN CA
2014-02-10 424-327-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDONDO CA
2014-02-05 424-337-4XXX 4000–4999Assigned IP HORIZON LLC 515J TORRANCE CA
2014-02-04 424-334-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 AVALON CA
2014-02-03 424-332-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 BEVERLYHLS CA
2014-01-28 424-335-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C BEVERLYHLS CA
2014-01-27 424-335-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2014-01-22 424-268-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNMN SNMN CA
2014-01-22 424-320-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 W ANGELES CA
2014-01-22 424-320-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 W ANGELES CA
2014-01-22 424-322-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNMN SNMN CA
2014-01-21 424-291-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J SNMN SNMN CA
2014-01-10 424-297-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HAWTHORNE CA
2014-01-09 424-273-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 W ANGELES CA
2013-12-27 424-488-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 TORRANCE CA
2013-12-11 424-292-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN GRDN CA
2013-12-11 424-292-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN GRDN CA
2013-12-11 424-292-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN GRDN CA
2013-12-11 424-292-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN GRDN CA
2013-12-11 424-295-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN GRDN CA
2013-12-10 424-289-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNMN MRVS CA
2013-12-09 424-327-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDONDO CA
2013-12-09 424-341-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CULVERCITY CA
2013-12-05 424-335-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2013-12-05 424-335-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BEVERLYHLS CA
2013-12-05 424-335-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2013-11-26 424-338-1XXX 1000–1999Assigned PACIFIC BELL 9740 CMTN CMTN 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.