NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 310
T-MOBILE USA, INC. 498
LEVEL 3 COMMUNICATIONS, LLC - CA 246
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 215
NEW CINGULAR WIRELESS PCS, LLC 198
ONVOY, LLC - CA 177
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
2013-01-14 310-905-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNMN MRVS CA
2013-01-14 310-905-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNMN MRVS CA
2013-01-14 310-905-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNMN MRVS CA
2013-01-14 310-905-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNMN MRVS CA
2012-12-31 310-595-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2012-12-31 310-879-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D CMTN GRDN CA
2012-12-31 310-879-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 CMTN GRDN CA
2012-12-31 310-879-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D CMTN GRDN CA
2012-12-21 310-881-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K SNMN MRVS CA
2012-12-19 310-307-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J W ANGELES CA
2012-12-19 310-596-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2012-12-19 310-596-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2012-12-19 310-596-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2012-12-19 310-627-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CMTN CMTN CA
2012-12-19 310-879-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CMTN GRDN CA
2012-12-18 310-879-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CMTN GRDN CA
2012-12-14 310-307-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 W ANGELES CA
2012-12-14 310-879-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C CMTN GRDN CA
2012-12-14 310-906-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 EL SEGUNDO CA
2012-12-12 310-307-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C W ANGELES CA
2012-12-12 310-307-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C W ANGELES CA
2012-12-12 310-307-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C W ANGELES CA
2012-12-06 310-881-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNMN MRVS CA
2012-12-04 310-347-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C TORRANCE CA
2012-12-03 310-596-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C CULVERCITY CA
2012-12-03 310-596-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C CULVERCITY CA
2012-12-03 310-870-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C REDONDO CA
2012-12-03 310-881-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNMN MRVS CA
2012-12-03 310-881-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNMN MRVS CA
2012-12-03 310-924-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C MALIBU CA
2012-11-20 310-627-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2012-10-30 310-507-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN PEDRO CA
2012-10-30 310-971-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN PEDRO CA
2012-10-29 310-919-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MALIBU CA
2012-10-17 310-596-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CULVERCITY CA
2012-10-12 310-299-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BEVERLYHLS CA
2012-10-12 310-299-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BEVERLYHLS CA
2012-10-12 310-299-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BEVERLYHLS CA
2012-10-09 310-627-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CMTN CMTN CA
2012-10-09 310-627-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CMTN CMTN CA
2012-10-08 310-299-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C BEVERLYHLS CA
2012-10-05 310-742-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CMTN CMTN CA
2012-10-04 310-504-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F REDONDO CA
2012-10-04 310-504-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F REDONDO CA
2012-10-04 310-504-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F REDONDO CA
2012-10-04 310-504-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F REDONDO CA
2012-10-04 310-504-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F REDONDO CA
2012-10-03 310-299-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C BEVERLYHLS CA
2012-10-03 310-299-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C BEVERLYHLS CA
2012-10-03 310-299-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C BEVERLYHLS 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.