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
2017-11-29 585-999-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E JAVA NY
2017-11-27 585-404-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HENRIETTA NY
2017-11-27 585-456-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2017-11-27 585-656-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ATTICA NY
2017-11-20 585-438-2XXX 2000–2999Assigned TC SYSTEMS, INC. - NY 7140 AVON NY
2017-11-10 585-888-2XXX 2000–2999Assigned ONVOY, LLC- NY 384C SCOTTSVL NY
2017-11-10 585-888-9XXX 9000–9999Assigned ONVOY, LLC- NY 384C SCOTTSVL NY
2017-11-06 585-405-6XXX 6000–6999Assigned ONVOY, LLC- NY 384C ROCHESTER NY
2017-10-26 585-625-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2017-10-17 585-250-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BATAVIA NY
2017-10-16 585-405-8XXX 8000–8999Assigned NUSO, LLC 551G ROCHESTER NY
2017-10-16 585-405-9XXX 9000–9999Assigned NUSO, LLC 551G ROCHESTER NY
2017-10-13 585-405-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2017-10-13 585-405-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2017-10-13 585-405-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2017-10-13 585-405-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2017-10-13 585-405-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2017-09-28 585-629-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2017-09-28 585-629-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2017-09-19 585-432-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E DANSVILLE NY
2017-09-19 585-497-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E HONEOYEFLS NY
2017-09-19 585-582-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E HONEOYEFLS NY
2017-09-19 585-648-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E WELLSVILLE NY
2017-09-19 585-648-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E WELLSVILLE NY
2017-09-18 585-774-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBION NY
2017-09-11 585-296-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WELLSVILLE NY
2017-09-07 585-800-2XXX 2000–2999Assigned FINGER LAKES TECHNOLOGIES GROUP, INC. - NY 629E BOLIVAR NY
2017-09-07 585-900-4XXX 4000–4999Assigned FINGER LAKES TECHNOLOGIES GROUP, INC. - NY 629E CHAFFEE NY
2017-09-07 585-999-4XXX 4000–4999Assigned FINGER LAKES TECHNOLOGIES GROUP, INC. - NY 629E JAVA NY
2017-08-21 585-789-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J EROCHESTER NY
2017-08-18 585-282-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FAIRPORT NY
2017-08-18 585-404-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HENRIETTA NY
2017-08-16 585-806-5XXX 5000–5999Assigned METROPCS, INC. 5562 OLEAN NY
2017-08-16 585-806-6XXX 6000–6999Assigned METROPCS, INC. 5562 OLEAN NY
2017-08-11 585-510-0XXX 0000–0999Assigned ONVOY, LLC- NY 384C ROCHESTER NY
2017-08-11 585-510-1XXX 1000–1999Assigned ONVOY, LLC- NY 384C ROCHESTER NY
2017-08-11 585-510-2XXX 2000–2999Assigned ONVOY, LLC- NY 384C ROCHESTER NY
2017-08-11 585-510-3XXX 3000–3999Assigned ONVOY, LLC- NY 384C ROCHESTER NY
2017-08-11 585-510-4XXX 4000–4999Assigned ONVOY, LLC- NY 384C ROCHESTER NY
2017-08-11 585-510-5XXX 5000–5999Assigned ONVOY, LLC- NY 384C ROCHESTER NY
2017-08-11 585-510-6XXX 6000–6999Assigned ONVOY, LLC- NY 384C ROCHESTER NY
2017-08-11 585-510-7XXX 7000–7999Assigned ONVOY, LLC- NY 384C ROCHESTER NY
2017-08-09 585-536-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BATAVIA NY
2017-08-07 585-378-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 OLEAN NY
2017-07-31 585-656-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ATTICA NY
2017-07-21 585-667-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WEBSTER NY
2017-07-18 585-537-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2017-07-10 585-366-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J HILTON NY
2017-04-27 585-937-0XXX 0000–0999Assigned TELNYX LLC 073H ALDEN NY
2017-04-26 585-407-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 VICTOR 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.