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
2007-07-31 585-645-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 WEBSTER NY
2007-07-26 585-209-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K CUBA NY
2007-07-24 585-627-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2007-07-24 585-627-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2007-07-24 585-627-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2007-07-23 585-366-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 HILTON NY
2007-07-23 585-412-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CANANDAGUA NY
2007-07-23 585-431-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BROCKPORT NY
2007-07-23 585-487-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 HENRIETTA NY
2007-07-23 585-617-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SPENCERPT NY
2007-07-23 585-670-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 W WEBSTER NY
2007-07-16 585-474-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-07-16 585-474-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-07-16 585-474-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-07-16 585-474-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-07-16 585-474-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-06-29 585-653-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K ARCADE NY
2007-06-27 585-678-7XXX 7000–7999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 FAIRPORT NY
2007-06-22 585-678-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 FAIRPORT NY
2007-06-18 585-287-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2007-06-11 585-465-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-06-11 585-465-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-06-11 585-465-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-06-11 585-465-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-06-07 585-563-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2007-06-05 585-201-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K BATAVIA NY
2007-06-05 585-297-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BATAVIA NY
2007-06-05 585-590-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBION NY
2007-06-05 585-808-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WELLSVILLE NY
2007-05-08 585-627-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2007-05-07 585-568-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2007-05-04 585-794-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-05-03 585-698-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-05-03 585-698-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-05-03 585-698-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-05-03 585-797-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-04-23 585-454-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2007-04-12 585-627-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2007-04-05 585-219-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BATAVIA NY
2007-04-03 585-613-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-04-03 585-669-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K SPRINGWTR NY
2007-03-20 585-991-5XXX 5000–5999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 GENESEO NY
2007-03-09 585-340-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2007-03-09 585-360-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2007-03-09 585-662-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EROCHESTER NY
2007-03-09 585-730-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2007-03-02 585-698-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-03-02 585-698-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-03-02 585-698-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-03-02 585-698-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 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.