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
2018-05-07 585-404-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E HENRIETTA NY
2018-05-07 585-510-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2018-05-01 585-384-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E COHOCTON NY
2018-05-01 585-443-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E GENESEO NY
2018-04-30 585-294-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E CALEDONIA NY
2018-04-30 585-299-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E CHURCHVL NY
2018-04-27 585-228-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E WARSAW NY
2018-04-18 585-488-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E SPENCERPT NY
2018-04-17 585-380-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E BLISS NY
2018-04-16 585-867-2XXX 2000–2999Assigned METROPCS, INC. 5562 ROCHESTER NY
2018-04-16 585-867-3XXX 3000–3999Assigned METROPCS, INC. 5562 ROCHESTER NY
2018-04-11 585-602-0XXX 0000–0999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
2018-04-11 585-602-1XXX 1000–1999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
2018-04-11 585-602-2XXX 2000–2999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
2018-04-11 585-602-3XXX 3000–3999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
2018-04-11 585-602-4XXX 4000–4999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
2018-04-11 585-602-5XXX 5000–5999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
2018-04-11 585-602-6XXX 6000–6999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
2018-04-11 585-602-7XXX 7000–7999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
2018-04-11 585-602-8XXX 8000–8999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
2018-04-11 585-602-9XXX 9000–9999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
2018-03-20 585-229-8XXX 8000–8999Assigned ONVOY, LLC- NY 384C HONEOYE NY
2018-02-22 585-304-1XXX 1000–1999Assigned ONVOY, LLC- NY 384C OAKFIELD NY
2018-02-20 585-789-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J EROCHESTER NY
2018-02-16 585-639-0XXX 0000–0999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E BROCKPORT NY
2018-02-13 585-405-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2018-02-12 585-213-5XXX 5000–5999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E WAYLAND NY
2018-02-12 585-404-7XXX 7000–7999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E HENRIETTA NY
2018-02-12 585-407-5XXX 5000–5999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E VICTOR NY
2018-02-12 585-438-0XXX 0000–0999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E AVON NY
2018-02-12 585-446-1XXX 1000–1999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E W WEBSTER NY
2018-02-12 585-468-7XXX 7000–7999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E NUNDA NY
2018-02-12 585-497-6XXX 6000–6999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E HONEOYEFLS NY
2018-02-12 585-536-4XXX 4000–4999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E BATAVIA NY
2018-02-12 585-667-9XXX 9000–9999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E WEBSTER NY
2018-02-12 585-798-7XXX 7000–7999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E MEDINA NY
2018-02-12 585-888-6XXX 6000–6999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E SCOTTSVL NY
2018-02-09 585-867-6XXX 6000–6999Assigned METROPCS, INC. 5562 ROCHESTER NY
2018-02-09 585-867-7XXX 7000–7999Assigned METROPCS, INC. 5562 ROCHESTER NY
2018-02-06 585-282-6XXX 6000–6999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E FAIRPORT NY
2018-02-05 585-348-5XXX 5000–5999Assigned PEERLESS NETWORK OF NEW YORK, LLC - NY 155E EROCHESTER NY
2018-02-02 585-448-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2018-02-02 585-673-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K EROCHESTER NY
2018-02-02 585-867-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2018-01-16 585-867-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2018-01-16 585-867-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2018-01-04 585-625-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2018-01-04 585-667-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 WEBSTER NY
2017-12-29 585-430-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FAIRPORT NY
2017-11-29 585-999-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E JAVA 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.