NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

3 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 516
CSC WIRELESS, LLC 3
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
2011-09-20 516-399-2XXX 2000–2999Assigned CSC VOICE, LLC 612K NASSAUZN04 NY
2011-09-14 516-418-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2011-09-14 516-418-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2011-09-08 516-497-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN02 NY
2011-09-08 516-864-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NASSAUZN07 NY
2011-08-30 516-341-7XXX 7000–7999Assigned CSC VOICE, LLC 612K NASSAUZN03 NY
2011-08-30 516-493-9XXX 9000–9999Assigned CSC VOICE, LLC 612K NASSAUZN05 NY
2011-08-26 516-415-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN06 NY
2011-08-22 516-341-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN03 NY
2011-08-08 516-414-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN05 NY
2011-08-08 516-515-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN05 NY
2011-08-08 516-522-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN05 NY
2011-07-27 516-535-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NASSAUZN05 NY
2011-07-21 516-234-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN01 NY
2011-07-21 516-399-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN04 NY
2011-07-14 516-415-8XXX 8000–8999Assigned METROPCS, INC. 5562 NASSAUZN06 NY
2011-07-14 516-415-9XXX 9000–9999Assigned METROPCS, INC. 5562 NASSAUZN06 NY
2011-07-14 516-497-8XXX 8000–8999Assigned METROPCS, INC. 5562 NASSAUZN02 NY
2011-07-13 516-545-0XXX 0000–0999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E NASSAUZN08 NY
2011-07-12 516-430-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN09 NY
2011-07-07 516-434-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2011-07-07 516-434-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2011-07-07 516-493-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2011-07-07 516-493-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2011-07-07 516-493-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2011-07-07 516-493-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2011-07-07 516-493-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2011-07-07 516-493-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2011-07-07 516-493-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2011-07-07 516-497-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN02 NY
2011-07-07 516-497-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN02 NY
2011-07-07 516-497-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN02 NY
2011-06-24 516-415-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - NY 282E NASSAUZN06 NY
2011-06-23 516-430-5XXX 5000–5999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E NASSAUZN09 NY
2011-06-16 516-493-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NASSAUZN05 NY
2011-06-16 516-493-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NASSAUZN05 NY
2011-06-15 516-434-2XXX 2000–2999Assigned CABLEVISION LIGHTPATH, INC. - NY 7126 NASSAUZN05 NY
2011-06-15 516-434-3XXX 3000–3999Assigned CABLEVISION LIGHTPATH, INC. - NY 7126 NASSAUZN05 NY
2011-06-15 516-434-4XXX 4000–4999Assigned CABLEVISION LIGHTPATH, INC. - NY 7126 NASSAUZN05 NY
2011-06-15 516-434-5XXX 5000–5999Assigned CABLEVISION LIGHTPATH, INC. - NY 7126 NASSAUZN05 NY
2011-06-15 516-434-6XXX 6000–6999Assigned CABLEVISION LIGHTPATH, INC. - NY 7126 NASSAUZN05 NY
2011-06-15 516-434-7XXX 7000–7999Assigned CABLEVISION LIGHTPATH, INC. - NY 7126 NASSAUZN05 NY
2011-06-08 516-366-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN09 NY
2011-06-08 516-366-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN09 NY
2011-06-07 516-584-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN07 NY
2011-06-06 516-366-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN09 NY
2011-06-06 516-366-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN09 NY
2011-05-25 516-366-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NASSAUZN09 NY
2011-05-10 516-434-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2011-05-10 516-434-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY

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.