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
2006-12-05 585-690-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2006-12-05 585-690-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2006-12-01 585-787-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K W WEBSTER NY
2006-11-30 585-678-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K FAIRPORT NY
2006-11-09 585-360-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2006-11-08 585-360-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2006-11-08 585-360-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2006-11-08 585-869-3XXX 3000–3999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 VICTOR NY
2006-11-06 585-490-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2006-10-26 585-490-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2006-10-17 585-662-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EROCHESTER NY
2006-10-16 585-360-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2006-10-13 585-268-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BELMONT NY
2006-10-13 585-831-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2006-10-09 585-678-2XXX 2000–2999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 FAIRPORT NY
2006-10-04 585-690-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2006-10-04 585-690-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2006-10-04 585-991-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 GENESEO NY
2006-09-21 585-384-4XXX 4000–4999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 COHOCTON NY
2006-09-15 585-689-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BLISS NY
2006-09-15 585-794-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2006-09-15 585-794-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2006-09-06 585-297-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BATAVIA NY
2006-09-06 585-402-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2006-09-06 585-402-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2006-09-06 585-402-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2006-09-06 585-610-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WELLSVILLE NY
2006-09-05 585-754-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2006-08-31 585-698-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2006-08-29 585-204-8XXX 8000–8999Assigned FRONTIER COMMUNICATIONS OF AMERICA, INC. - NY 2475 DANSVILLE NY
2006-08-29 585-402-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2006-08-16 585-418-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K E PEMBROKE NY
2006-08-15 585-542-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 AKRON NY
2006-08-15 585-708-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ATTICA NY
2006-08-14 585-735-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 MIDDLEPORT NY
2006-08-07 585-493-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K CASTILE NY
2006-08-07 585-531-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K NAPLES NY
2006-08-07 585-533-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K RUSH NY
2006-08-03 585-297-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BATAVIA NY
2006-08-03 585-519-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 GENESEO NY
2006-08-03 585-659-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K KENDALL NY
2006-07-31 585-302-3XXX 3000–3999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 PERRY NY
2006-07-31 585-347-7XXX 7000–7999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 W WEBSTER NY
2006-07-31 585-391-2XXX 2000–2999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 BROCKPORT NY
2006-07-31 585-412-7XXX 7000–7999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 CANANDAGUA NY
2006-07-31 585-487-5XXX 5000–5999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 HENRIETTA NY
2006-07-31 585-545-3XXX 3000–3999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 WEBSTER NY
2006-07-31 585-643-2XXX 2000–2999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 EROCHESTER NY
2006-07-31 585-643-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 EROCHESTER NY
2006-07-31 585-991-4XXX 4000–4999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 GENESEO 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.