NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 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 818
BANDWIDTH.COM CLEC, LLC - CA 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
2011-01-24 818-561-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2011-01-24 818-561-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2011-01-24 818-583-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PSDN LACN CA
2011-01-24 818-666-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VAN NUYS CA
2011-01-14 818-724-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFN SPLV CA
2011-01-12 818-538-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VAN NUYS CA
2011-01-11 818-255-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NO HOLLYWD CA
2011-01-11 818-483-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 AGOURA CA
2011-01-10 818-459-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GLENDALE CA
2010-12-28 818-561-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C BRBN BRBN CA
2010-12-28 818-963-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C CANOGAPARK CA
2010-12-23 818-532-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F AGOURA CA
2010-12-22 818-945-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GLENDALE CA
2010-12-21 818-272-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D SNFN PACM CA
2010-12-21 818-582-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F VAN NUYS CA
2010-12-21 818-649-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F GLENDALE CA
2010-12-21 818-751-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BRBN BRBN CA
2010-12-21 818-949-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PSDN LACN CA
2010-12-16 818-561-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BRBN BRBN CA
2010-12-16 818-561-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BRBN BRBN CA
2010-12-10 818-937-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K GLENDALE CA
2010-12-03 818-473-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SUNLD TJNG CA
2010-11-30 818-666-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VAN NUYS CA
2010-11-24 818-664-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GLENDALE CA
2010-11-24 818-664-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GLENDALE CA
2010-11-24 818-664-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GLENDALE CA
2010-11-24 818-664-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GLENDALE CA
2010-11-24 818-664-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GLENDALE CA
2010-11-24 818-664-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GLENDALE CA
2010-11-23 818-643-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NO HOLLYWD CA
2010-11-23 818-646-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VAN NUYS CA
2010-11-18 818-245-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E GLENDALE CA
2010-11-18 818-254-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E GLENDALE CA
2010-11-18 818-254-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E GLENDALE CA
2010-11-18 818-275-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LACRSCENTA CA
2010-11-18 818-538-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VAN NUYS CA
2010-11-18 818-538-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VAN NUYS CA
2010-11-18 818-538-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VAN NUYS CA
2010-11-18 818-659-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PSDN LACN CA
2010-11-18 818-724-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFN SPLV CA
2010-11-18 818-724-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFN SPLV CA
2010-11-18 818-732-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NO HOLLYWD CA
2010-11-18 818-732-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NO HOLLYWD CA
2010-11-18 818-732-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NO HOLLYWD CA
2010-11-18 818-794-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFN PACM CA
2010-11-18 818-900-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFN GRHL CA
2010-11-12 818-600-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C RESEDA CA
2010-11-12 818-639-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFN SNFN CA
2010-11-05 818-408-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNFN SNFN CA
2010-11-05 818-514-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RESEDA 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.