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
2016-09-16 424-527-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2016-09-16 424-527-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2016-09-16 424-542-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2016-09-15 424-366-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CMTN CMTN CA
2016-09-15 424-523-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CULVERCITY CA
2016-09-14 424-308-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D SAN PEDRO CA
2016-09-14 424-390-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDONDO CA
2016-09-14 424-390-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDONDO CA
2016-09-14 424-537-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNMN MRVS CA
2016-09-13 424-221-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CMTN GRDN CA
2016-09-13 424-308-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SAN PEDRO CA
2016-09-13 424-308-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SAN PEDRO CA
2016-09-13 424-319-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CMTN GRDN CA
2016-09-13 424-319-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CMTN GRDN CA
2016-09-13 424-319-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CMTN GRDN CA
2016-09-13 424-380-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F INGLEWOOD CA
2016-09-13 424-558-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TORRANCE CA
2016-09-06 424-390-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDONDO CA
2016-09-01 424-319-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CMTN GRDN CA
2016-09-01 424-537-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNMN MRVS CA
2016-08-29 424-390-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 REDONDO CA
2016-08-26 424-229-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K SNMN SNMN CA
2016-08-26 424-388-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MALIBU CA
2016-08-26 424-456-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K HAWTHORNE CA
2016-08-25 424-366-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2016-08-25 424-366-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2016-08-25 424-366-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2016-08-24 424-397-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EL SEGUNDO CA
2016-08-23 424-443-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNMN MRVS CA
2016-08-23 424-443-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNMN MRVS CA
2016-08-22 424-309-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E INGLEWOOD CA
2016-08-16 424-309-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F INGLEWOOD CA
2016-08-16 424-318-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2016-08-16 424-318-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2016-08-16 424-318-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2016-08-16 424-318-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2016-08-16 424-360-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2016-08-16 424-388-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MALIBU CA
2016-08-16 424-388-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MALIBU CA
2016-08-15 424-202-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BEVERLYHLS CA
2016-08-15 424-303-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BEVERLYHLS CA
2016-08-10 424-523-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 CULVERCITY CA
2016-08-10 424-903-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L REDONDO CA
2016-08-09 424-301-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 EL SEGUNDO CA
2016-08-09 424-307-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HAWTHORNE CA
2016-08-09 424-367-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 EL SEGUNDO CA
2016-08-09 424-380-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2016-08-09 424-380-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2016-08-09 424-380-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2016-08-09 424-402-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 W ANGELES 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.