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
2018-12-24 424-401-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LOMITA CA
2018-12-24 424-419-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2018-12-04 424-406-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2018-11-30 424-323-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TORRANCE CA
2018-11-30 424-323-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 TORRANCE CA
2018-11-30 424-405-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F EL SEGUNDO CA
2018-11-30 424-407-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F W ANGELES CA
2018-11-30 424-421-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BEVERLYHLS CA
2018-11-26 424-410-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNMN MRVS CA
2018-11-15 424-408-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F REDONDO CA
2018-11-09 424-419-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2018-11-09 424-425-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MALIBU CA
2018-11-06 424-417-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SAN PEDRO CA
2018-10-30 424-426-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 HAWTHORNE CA
2018-10-26 424-406-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K CMTN CMTN CA
2018-10-26 424-406-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K CMTN CMTN CA
2018-10-19 424-408-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 REDONDO CA
2018-10-18 424-310-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2018-10-18 424-336-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2018-10-17 424-410-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNMN MRVS CA
2018-10-16 424-323-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2018-10-16 424-323-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2018-10-11 424-376-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D TORRANCE CA
2018-10-11 424-501-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 CULVERCITY CA
2018-10-11 424-703-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D SAN PEDRO CA
2018-10-09 424-425-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MALIBU CA
2018-10-08 424-307-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 HAWTHORNE CA
2018-10-08 424-401-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LOMITA CA
2018-10-08 424-489-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN PEDRO CA
2018-10-04 424-323-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TORRANCE CA
2018-10-04 424-413-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNMN SNMN CA
2018-10-04 424-413-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNMN SNMN CA
2018-10-04 424-413-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNMN SNMN CA
2018-10-02 424-407-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2018-10-02 424-407-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2018-10-01 424-541-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K INGLEWOOD CA
2018-09-25 424-416-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNMN SNMN CA
2018-09-25 424-536-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAN PEDRO CA
2018-09-24 424-551-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CMTN GRDN CA
2018-09-18 424-408-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 REDONDO CA
2018-09-14 424-419-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2018-08-23 424-310-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2018-08-23 424-310-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2018-08-23 424-406-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K CMTN CMTN CA
2018-08-22 424-425-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MALIBU CA
2018-08-21 424-413-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNMN SNMN CA
2018-08-21 424-413-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNMN SNMN CA
2018-08-06 424-401-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LOMITA CA
2018-08-06 424-423-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EL SEGUNDO CA
2018-07-31 424-425-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MALIBU 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.