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
2005-05-18 585-753-9XXX 9000–9999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
2005-05-16 585-813-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BATAVIA NY
2005-05-13 585-410-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2005-05-13 585-410-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2005-05-12 585-410-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2005-05-09 585-322-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BLISS NY
2005-05-09 585-469-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-05-09 585-469-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-05-09 585-469-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-05-09 585-469-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-05-09 585-610-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WELLSVILLE NY
2005-04-20 585-410-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2005-04-11 585-406-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-04-11 585-406-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-04-07 585-216-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WEBSTER NY
2005-04-07 585-216-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WEBSTER NY
2005-03-24 585-558-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K WARSAW NY
2005-03-22 585-571-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 SCOTTSVL NY
2005-03-08 585-469-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-03-08 585-469-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-03-08 585-469-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-03-03 585-590-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBION NY
2005-02-15 585-302-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 PERRY NY
2005-02-15 585-496-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CHAFFEE NY
2005-02-10 585-410-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-02-10 585-410-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-02-10 585-410-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-02-10 585-410-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-02-10 585-410-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-02-10 585-410-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2005-02-08 585-438-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K AVON NY
2005-02-03 585-672-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2005-02-03 585-672-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2005-01-26 585-300-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BATAVIA NY
2005-01-26 585-502-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 LE ROY NY
2005-01-26 585-612-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 DANSVILLE NY
2005-01-24 585-269-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2005-01-24 585-269-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2005-01-24 585-269-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2005-01-24 585-333-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2005-01-24 585-760-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2005-01-19 585-301-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2005-01-19 585-413-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2005-01-19 585-413-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2005-01-19 585-413-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2005-01-19 585-489-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2005-01-19 585-489-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2005-01-19 585-489-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2005-01-19 585-489-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2005-01-19 585-489-4XXX 4000–4999Assigned 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.