NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

17 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 15
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
2019-06-19 424-420-0XXX 0000–0999Assigned FRACTEL, LLC 965H INGLEWOOD CA
2019-06-19 424-420-4XXX 4000–4999Assigned FRACTEL, LLC 965H INGLEWOOD CA
2019-06-18 424-331-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2019-06-18 424-440-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2019-06-11 424-422-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MALIBU CA
2019-06-06 424-422-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MALIBU CA
2019-05-31 424-365-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 W ANGELES CA
2019-05-28 424-435-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TORRANCE CA
2019-05-24 424-428-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNMN MRVS CA
2019-05-24 424-489-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN PEDRO CA
2019-05-22 424-429-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN CMTN CA
2019-05-22 424-429-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN CMTN CA
2019-05-22 424-429-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN CMTN CA
2019-05-22 424-429-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 CMTN CMTN CA
2019-05-22 424-429-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN CMTN CA
2019-05-22 424-429-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN CMTN CA
2019-05-22 424-429-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN CMTN CA
2019-05-21 424-431-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BEVERLYHLS CA
2019-05-20 424-758-6XXX 6000–6999Assigned FRACTEL, LLC 965H CMTN CMTN CA
2019-05-17 424-325-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E W ANGELES CA
2019-05-17 424-371-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E W ANGELES CA
2019-05-17 424-376-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TORRANCE CA
2019-05-17 424-382-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BEVERLYHLS CA
2019-05-17 424-419-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E INGLEWOOD CA
2019-05-17 424-426-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HAWTHORNE CA
2019-05-17 424-426-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HAWTHORNE CA
2019-05-14 424-429-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2019-05-14 424-429-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2019-05-14 424-430-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN GRDN CA
2019-05-14 424-430-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN GRDN CA
2019-05-14 424-430-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN GRDN CA
2019-05-14 424-430-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN GRDN CA
2019-05-10 424-295-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN GRDN CA
2019-05-08 424-434-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K CULVERCITY CA
2019-05-08 424-434-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K CULVERCITY CA
2019-05-08 424-434-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K CULVERCITY CA
2019-05-08 424-434-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K CULVERCITY CA
2019-05-01 424-499-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E EL SEGUNDO CA
2019-04-29 424-427-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CMTN CMTN CA
2019-04-29 424-666-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BEVERLYHLS CA
2019-04-17 424-551-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 CMTN GRDN CA
2019-04-16 424-420-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2019-04-16 424-420-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2019-04-16 424-420-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2019-04-15 424-422-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MALIBU CA
2019-04-10 424-426-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2019-04-10 424-426-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2019-04-10 424-427-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN CMTN CA
2019-04-10 424-427-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN CMTN CA
2019-04-10 424-427-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN CMTN 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.