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
2010-09-17 585-326-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E AKRON NY
2010-09-17 585-326-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E AKRON NY
2010-09-14 585-236-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E WEBSTER NY
2010-09-14 585-347-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E W WEBSTER NY
2010-09-14 585-431-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E BROCKPORT NY
2010-09-14 585-433-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E VICTOR NY
2010-09-14 585-444-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E HENRIETTA NY
2010-09-14 585-497-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E HONEOYEFLS NY
2010-09-14 585-571-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E SCOTTSVL NY
2010-09-14 585-991-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E GENESEO NY
2010-09-08 585-270-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ROCHESTER NY
2010-09-07 585-236-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WEBSTER NY
2010-09-07 585-851-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2010-08-23 585-296-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E WELLSVILLE NY
2010-08-16 585-250-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E BATAVIA NY
2010-08-16 585-270-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2010-08-16 585-283-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ALBION NY
2010-08-16 585-318-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E MEDINA NY
2010-08-16 585-376-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E OLEAN NY
2010-08-16 585-687-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E EASTAURORA NY
2010-08-16 585-902-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ALDEN NY
2010-08-13 585-563-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2010-08-13 585-563-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2010-08-04 585-775-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2010-07-22 585-310-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E EROCHESTER NY
2010-07-16 585-310-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E EROCHESTER NY
2010-07-15 585-270-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2010-07-12 585-204-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 DANSVILLE NY
2010-07-09 585-201-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BATAVIA NY
2010-07-09 585-678-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E FAIRPORT NY
2010-07-06 585-236-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WEBSTER NY
2010-07-06 585-773-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2010-06-25 585-290-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2010-06-25 585-290-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2010-06-25 585-290-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2010-06-25 585-290-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2010-06-25 585-290-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2010-06-25 585-290-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2010-06-25 585-290-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2010-06-25 585-290-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2010-06-25 585-290-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2010-06-25 585-290-9XXX 9000–9999Assigned METROPCS, INC. 5562 ROCHESTER NY
2010-06-25 585-412-3XXX 3000–3999Assigned METROPCS, INC. 5562 CANANDAGUA NY
2010-06-25 585-789-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 EROCHESTER NY
2010-06-16 585-643-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EROCHESTER NY
2010-06-03 585-714-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K EASTAURORA NY
2010-06-03 585-770-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2010-06-03 585-902-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K ALDEN NY
2010-06-02 585-205-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K MIDDLEPORT NY
2010-06-02 585-228-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K WARSAW 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.