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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2018-07-03 424-417-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAN PEDRO CA
2018-07-03 424-417-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAN PEDRO CA
2018-06-25 424-391-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2018-06-08 424-399-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2018-05-16 424-416-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNMN SNMN CA
2018-05-15 424-413-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D SNMN SNMN CA
2018-05-14 424-405-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J EL SEGUNDO CA
2018-05-14 424-405-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J EL SEGUNDO CA
2018-05-14 424-528-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CMTN GRDN CA
2018-05-14 424-528-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CMTN GRDN CA
2018-05-14 424-528-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CMTN GRDN CA
2018-05-14 424-528-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CMTN GRDN CA
2018-05-14 424-528-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CMTN GRDN CA
2018-05-11 424-319-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN GRDN CA
2018-05-11 424-409-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDONDO CA
2018-05-03 424-406-4XXX 4000–4999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H CMTN CMTN CA
2018-05-03 424-409-4XXX 4000–4999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H REDONDO CA
2018-05-01 424-401-9XXX 9000–9999Assigned TELNYX LLC 073H LOMITA CA
2018-04-27 424-407-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J W ANGELES CA
2018-04-24 424-310-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H HAWTHORNE CA
2018-04-24 424-401-4XXX 4000–4999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H LOMITA CA
2018-04-24 424-501-7XXX 7000–7999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H CULVERCITY CA
2018-04-24 424-551-0XXX 0000–0999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H CMTN GRDN CA
2018-04-16 424-407-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D W ANGELES CA
2018-04-13 424-512-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 BEVERLYHLS CA
2018-04-06 424-425-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MALIBU CA
2018-04-03 424-409-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K REDONDO CA
2018-04-02 424-406-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN CMTN CA
2018-04-02 424-406-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN CMTN CA
2018-03-29 424-403-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CMTN CMTN CA
2018-03-22 424-409-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDONDO CA
2018-03-16 424-489-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN PEDRO CA
2018-03-16 424-567-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAWTHORNE CA
2018-03-07 424-501-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2018-03-07 424-501-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2018-03-07 424-501-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2018-03-06 424-425-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MALIBU CA
2018-03-01 424-538-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNMN SNMN CA
2018-02-12 424-559-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D W ANGELES CA
2018-02-12 424-559-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D W ANGELES CA
2018-02-12 424-559-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D W ANGELES CA
2018-02-12 424-559-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D W ANGELES CA
2018-01-31 424-390-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D REDONDO CA
2018-01-31 424-559-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2018-01-31 424-559-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2018-01-31 424-559-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D W ANGELES CA
2018-01-31 424-559-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D W ANGELES CA
2018-01-26 424-419-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 INGLEWOOD CA
2018-01-17 424-489-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 SAN PEDRO CA
2018-01-17 424-541-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 INGLEWOOD 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.