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
2014-02-21 585-484-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ROCHESTER NY
2014-02-21 585-484-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ROCHESTER NY
2014-01-22 585-207-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E FILLMORE NY
2014-01-22 585-481-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2014-01-10 585-441-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ROCHESTER NY
2014-01-07 585-296-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WELLSVILLE NY
2014-01-07 585-481-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2014-01-07 585-481-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2014-01-07 585-481-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2014-01-07 585-481-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2014-01-07 585-481-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2013-12-19 585-484-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 ROCHESTER NY
2013-12-19 585-484-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 ROCHESTER NY
2013-12-19 585-484-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 ROCHESTER NY
2013-12-19 585-484-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 ROCHESTER NY
2013-12-19 585-484-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 ROCHESTER NY
2013-12-17 585-376-9XXX 9000–9999Assigned IP HORIZON LLC 515J OLEAN NY
2013-12-17 585-714-8XXX 8000–8999Assigned IP HORIZON LLC 515J EASTAURORA NY
2013-12-17 585-993-9XXX 9000–9999Assigned IP HORIZON LLC 515J BATAVIA NY
2013-12-03 585-357-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J ALBION NY
2013-11-27 585-219-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BATAVIA NY
2013-11-27 585-471-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2013-11-18 585-632-4XXX 4000–4999Assigned ONVOY, LLC- NY 384C BERGEN NY
2013-11-18 585-632-5XXX 5000–5999Assigned ONVOY, LLC- NY 384C BERGEN NY
2013-11-18 585-632-6XXX 6000–6999Assigned ONVOY, LLC- NY 384C BERGEN NY
2013-11-18 585-632-7XXX 7000–7999Assigned ONVOY, LLC- NY 384C BERGEN NY
2013-11-18 585-632-8XXX 8000–8999Assigned ONVOY, LLC- NY 384C BERGEN NY
2013-11-15 585-471-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2013-11-15 585-481-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2013-10-30 585-481-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2013-10-30 585-481-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2013-10-22 585-471-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2013-10-04 585-471-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2013-09-12 585-300-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BATAVIA NY
2013-09-12 585-332-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LYNDONVL NY
2013-09-03 585-203-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EROCHESTER NY
2013-08-30 585-215-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 WYOMING NY
2013-08-15 585-643-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E EROCHESTER NY
2013-08-12 585-371-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ROCHESTER NY
2013-08-06 585-444-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - NY 282E HENRIETTA NY
2013-08-06 585-978-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2013-07-24 585-310-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K EROCHESTER NY
2013-07-19 585-445-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2013-07-19 585-471-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2013-07-15 585-318-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 MEDINA NY
2013-06-25 585-948-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J OAKFIELD NY
2013-06-18 585-435-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2013-06-18 585-446-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 W WEBSTER NY
2013-06-05 585-445-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2013-05-31 585-445-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER 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.