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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2013-05-31 585-445-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2013-05-29 585-708-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ATTICA NY
2013-05-15 585-431-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 BROCKPORT NY
2013-04-29 585-203-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EROCHESTER NY
2013-04-25 585-735-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MIDDLEPORT NY
2013-04-24 585-445-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2013-04-05 585-371-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ROCHESTER NY
2013-04-05 585-371-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ROCHESTER NY
2013-04-05 585-371-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ROCHESTER NY
2013-04-05 585-371-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ROCHESTER NY
2013-03-27 585-307-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 OLEAN NY
2013-03-12 585-433-6XXX 6000–6999Assigned FINGER LAKES TECHNOLOGIES GROUP, INC. - NY 629E VICTOR NY
2013-03-11 585-978-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2013-03-07 585-493-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 CASTILE NY
2013-02-28 585-626-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WEBSTER NY
2013-02-27 585-441-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2013-02-19 585-441-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2013-02-06 585-337-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J CANANDAGUA NY
2013-01-28 585-626-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WEBSTER NY
2013-01-17 585-283-7XXX 7000–7999Assigned ONVOY, LLC- NY 384C ALBION NY
2013-01-15 585-978-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2013-01-03 585-676-5XXX 5000–5999Assigned VERIZON NEW YORK, INC. 9104 FRANKLINVL NY
2012-12-31 585-416-2XXX 2000–2999Assigned ONVOY, LLC- NY 384C WATERPORT NY
2012-12-21 585-376-5XXX 5000–5999Assigned ONVOY, LLC- NY 384C OLEAN NY
2012-12-21 585-397-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2012-12-21 585-397-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2012-12-21 585-397-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2012-12-21 585-397-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2012-12-21 585-397-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2012-12-21 585-397-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2012-12-21 585-435-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2012-12-20 585-332-2XXX 2000–2999Assigned ONVOY, LLC- NY 384C LYNDONVL NY
2012-12-19 585-206-4XXX 4000–4999Assigned ONVOY, LLC- NY 384C HOLLEY NY
2012-12-18 585-209-6XXX 6000–6999Assigned ONVOY, LLC- NY 384C CUBA NY
2012-12-14 585-492-9XXX 9000–9999Assigned ONVOY, LLC- NY 384C ARCADE NY
2012-12-14 585-708-1XXX 1000–1999Assigned ONVOY, LLC- NY 384C ATTICA NY
2012-12-14 585-800-1XXX 1000–1999Assigned ONVOY, LLC- NY 384C BOLIVAR NY
2012-12-12 585-978-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2012-12-05 585-369-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2012-12-05 585-369-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2012-12-05 585-435-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2012-12-05 585-435-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2012-11-15 585-397-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ROCHESTER NY
2012-11-13 585-369-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2012-11-06 585-380-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BLISS NY
2012-11-06 585-435-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2012-11-06 585-435-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2012-10-24 585-445-1XXX 1000–1999Assigned NUSO, LLC 551G ROCHESTER NY
2012-09-28 585-397-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2012-09-20 585-432-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E DANSVILLE 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.