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
2015-04-02 585-491-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2015-04-01 585-736-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2015-04-01 585-736-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2015-04-01 585-736-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2015-03-31 585-714-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E EASTAURORA NY
2015-03-18 585-673-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E EROCHESTER NY
2015-03-18 585-673-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E EROCHESTER NY
2015-03-13 585-364-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E FAIRPORT NY
2015-03-13 585-431-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E BROCKPORT NY
2015-03-13 585-524-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E BATAVIA NY
2015-03-13 585-524-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BATAVIA NY
2015-03-13 585-524-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BATAVIA NY
2015-03-13 585-524-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BATAVIA NY
2015-03-13 585-532-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2015-03-13 585-532-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2015-03-13 585-532-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2015-03-13 585-532-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2015-03-13 585-643-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E EROCHESTER NY
2015-03-13 585-653-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ARCADE NY
2015-03-09 585-364-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K FAIRPORT NY
2015-03-09 585-532-0XXX 0000–0999Assigned METROPCS, INC. 5562 ROCHESTER NY
2015-03-09 585-532-1XXX 1000–1999Assigned METROPCS, INC. 5562 ROCHESTER NY
2015-03-09 585-532-9XXX 9000–9999Assigned METROPCS, INC. 5562 ROCHESTER NY
2015-03-03 585-635-5XXX 5000–5999Assigned METROPCS, INC. 5562 EROCHESTER NY
2015-03-03 585-635-6XXX 6000–6999Assigned METROPCS, INC. 5562 EROCHESTER NY
2015-03-03 585-642-5XXX 5000–5999Assigned METROPCS, INC. 5562 ROCHESTER NY
2015-03-03 585-642-7XXX 7000–7999Assigned METROPCS, INC. 5562 ROCHESTER NY
2015-02-26 585-435-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2015-02-26 585-445-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2015-02-04 585-337-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E CANANDAGUA NY
2015-01-26 585-524-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BATAVIA NY
2015-01-26 585-642-4XXX 4000–4999Assigned ONVOY, LLC- NY 384C ROCHESTER NY
2015-01-26 585-667-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E WEBSTER NY
2015-01-20 585-434-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2015-01-20 585-434-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2015-01-12 585-434-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2015-01-12 585-434-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2014-12-23 585-535-6XXX 6000–6999Assigned ONVOY, LLC- NY 384C VARYSBURG NY
2014-12-19 585-483-7XXX 7000–7999Assigned ONVOY, LLC- NY 384C BATAVIA NY
2014-12-19 585-815-2XXX 2000–2999Assigned ONVOY, LLC- NY 384C BATAVIA NY
2014-12-11 585-434-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2014-12-11 585-434-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2014-12-11 585-434-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2014-11-25 585-497-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E HONEOYEFLS NY
2014-11-24 585-444-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K HENRIETTA NY
2014-11-11 585-642-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2014-11-07 585-642-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2014-11-07 585-642-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2014-11-07 585-642-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2014-11-03 585-483-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BATAVIA 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.