NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

5 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2005-01-17 585-413-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2005-01-17 585-413-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2005-01-17 585-413-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2005-01-13 585-200-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 EROCHESTER NY
2005-01-12 585-350-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2005-01-06 585-245-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 GENESEO NY
2005-01-06 585-245-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 GENESEO NY
2005-01-06 585-813-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BATAVIA NY
2005-01-05 585-905-6XXX 6000–6999Assigned METROPCS, INC. 5562 CANANDAGUA NY
2004-12-29 585-598-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 FAIRPORT NY
2004-12-22 585-200-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 EROCHESTER NY
2004-12-22 585-200-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 EROCHESTER NY
2004-12-20 585-413-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2004-12-20 585-413-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2004-12-07 585-489-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2004-12-07 585-489-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2004-12-07 585-489-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2004-12-07 585-489-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2004-12-06 585-487-2XXX 2000–2999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 HENRIETTA NY
2004-12-03 585-200-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 EROCHESTER NY
2004-12-03 585-200-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 EROCHESTER NY
2004-11-22 585-413-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2004-11-05 585-217-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WEBSTER NY
2004-11-05 585-217-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WEBSTER NY
2004-11-04 585-301-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2004-11-04 585-301-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2004-11-04 585-301-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2004-11-04 585-301-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2004-10-18 585-489-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2004-10-18 585-636-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K HAMLIN NY
2004-10-12 585-815-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J BATAVIA NY
2004-10-08 585-502-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 LE ROY NY
2004-10-06 585-200-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 EROCHESTER NY
2004-10-06 585-300-3XXX 3000–3999Assigned METROPCS, INC. 5562 BATAVIA NY
2004-10-06 585-905-2XXX 2000–2999Assigned METROPCS, INC. 5562 CANANDAGUA NY
2004-10-05 585-346-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K LIVONIA NY
2004-10-05 585-519-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K GENESEO NY
2004-10-05 585-638-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K HOLLEY NY
2004-09-28 585-318-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K MEDINA NY
2004-09-16 585-301-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2004-09-08 585-322-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BLISS NY
2004-09-08 585-610-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WELLSVILLE NY
2004-09-08 585-610-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WELLSVILLE NY
2004-09-08 585-813-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BATAVIA NY
2004-09-08 585-813-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BATAVIA NY
2004-09-07 585-301-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2004-09-07 585-301-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2004-09-07 585-301-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2004-09-01 585-662-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 EROCHESTER NY
2004-08-24 585-319-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.