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
2003-05-27 818-577-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CANOGAPARK CA
2003-05-27 818-577-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CANOGAPARK CA
2003-05-27 818-577-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CANOGAPARK CA
2003-05-27 818-577-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CANOGAPARK CA
2003-05-13 818-232-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NO HOLLYWD CA
2003-05-13 818-339-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D NO HOLLYWD CA
2003-05-13 818-339-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D NO HOLLYWD CA
2003-05-13 818-339-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D NO HOLLYWD CA
2003-05-13 818-339-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D NO HOLLYWD CA
2003-04-25 818-572-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GLENDALE CA
2003-04-16 818-451-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D CANOGAPARK CA
2003-04-07 818-200-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NO HOLLYWD CA
2003-04-07 818-200-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NO HOLLYWD CA
2003-04-07 818-200-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NO HOLLYWD CA
2003-04-07 818-200-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NO HOLLYWD CA
2003-04-07 818-510-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 VAN NUYS CA
2003-04-07 818-510-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 VAN NUYS CA
2003-04-07 818-510-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 VAN NUYS CA
2003-04-07 818-510-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 VAN NUYS CA
2003-04-07 818-510-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 VAN NUYS CA
2003-04-05 818-296-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 GLENDALE CA
2003-04-05 818-296-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 GLENDALE CA
2003-04-05 818-806-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BRBN SNVY CA
2003-04-02 818-979-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNFN SNFN CA
2003-04-02 818-979-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D SNFN SNFN CA
2003-03-17 818-308-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NO HOLLYWD CA
2003-03-17 818-308-9XXX 9000–9999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NO HOLLYWD CA
2003-03-17 818-338-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AGOURA CA
2003-03-17 818-638-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J GLENDALE CA
2003-03-17 818-668-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RESEDA CA
2003-03-17 818-864-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PSDN LACN CA
2003-03-13 818-462-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 RESEDA CA
2003-03-13 818-921-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 RESEDA CA
2003-03-13 818-921-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RESEDA CA
2003-03-10 818-256-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFN SNFN CA
2003-03-10 818-256-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFN SNFN CA
2003-03-03 818-282-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFN GRHL CA
2003-03-03 818-334-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GLENDALE CA
2003-02-26 818-339-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D NO HOLLYWD CA
2003-02-26 818-339-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D NO HOLLYWD CA
2003-02-26 818-339-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D NO HOLLYWD CA
2003-01-15 818-336-3XXX 3000–3999Assigned AT&T - LOCAL 7421 SNFN SNFN CA
2002-12-17 818-435-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NORTHRIDGE CA
2002-12-17 818-581-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFN SNFN CA
2002-12-17 818-921-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RESEDA CA
2002-12-17 818-924-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFN SPLV CA
2002-12-06 818-255-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J NO HOLLYWD CA
2002-11-21 818-271-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFN GRHL CA
2002-11-21 818-271-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFN GRHL CA
2002-11-21 818-271-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFN GRHL 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.