NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

5 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 585
EXIANT COMMUNICATIONS LLC 3
TC SYSTEMS, INC. - NY 1
NEW CINGULAR WIRELESS PCS, LLC - DC 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
2011-12-28 585-206-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E HOLLEY NY
2011-12-28 585-365-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E BELFAST NY
2011-12-21 585-380-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E BLISS NY
2011-12-19 585-535-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E VARYSBURG NY
2011-12-13 585-207-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E FILLMORE NY
2011-12-13 585-382-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E LEICESTER NY
2011-12-13 585-495-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E WYOMING NY
2011-12-13 585-548-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E BYRON NY
2011-12-09 585-939-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2011-12-08 585-659-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E KENDALL NY
2011-12-08 585-928-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E BOLIVAR NY
2011-12-08 585-973-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E FRIENDSHIP NY
2011-11-16 585-270-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2011-11-11 585-437-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E RUSHFORD NY
2011-11-10 585-479-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BATAVIA NY
2011-11-08 585-283-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ALBION NY
2011-10-26 585-572-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E LIVONIA NY
2011-10-26 585-757-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ELBA NY
2011-10-20 585-386-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANGELICA NY
2011-10-17 585-384-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E COHOCTON NY
2011-10-17 585-416-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E WATERPORT NY
2011-10-17 585-547-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E DARIEN NY
2011-09-26 585-310-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 EROCHESTER NY
2011-09-15 585-785-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2011-09-13 585-250-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E BATAVIA NY
2011-09-13 585-512-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ROCHESTER NY
2011-09-12 585-493-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E CASTILE NY
2011-09-02 585-213-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E WAYLAND NY
2011-08-29 585-533-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E RUSH NY
2011-08-22 585-633-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ROCHESTER NY
2011-08-22 585-666-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ROCHESTER NY
2011-08-22 585-666-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ROCHESTER NY
2011-08-12 585-479-3XXX 3000–3999Assigned ONVOY, LLC- NY 384C BATAVIA NY
2011-08-08 585-869-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J VICTOR NY
2011-07-27 585-633-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2011-07-21 585-358-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 HENRIETTA NY
2011-07-19 585-466-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ANGELICA NY
2011-07-13 585-438-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 AVON NY
2011-07-13 585-633-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2011-07-13 585-888-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SCOTTSVL NY
2011-07-11 585-353-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2011-07-07 585-353-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2011-07-07 585-353-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2011-07-07 585-353-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2011-06-20 585-250-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BATAVIA NY
2011-06-20 585-353-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2011-06-10 585-310-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E EROCHESTER NY
2011-06-10 585-310-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E EROCHESTER NY
2011-06-10 585-479-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J BATAVIA NY
2011-06-10 585-789-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 EROCHESTER 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.