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
2007-11-29 585-645-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WEBSTER NY
2007-11-29 585-689-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BLISS NY
2007-11-28 585-743-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2007-11-20 585-285-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2007-11-20 585-412-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 CANANDAGUA NY
2007-11-20 585-641-6XXX 6000–6999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 EROCHESTER NY
2007-11-07 585-465-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2007-10-30 585-694-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-10-23 585-331-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBION NY
2007-10-23 585-857-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-10-23 585-857-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-10-23 585-857-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-10-15 585-444-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J HENRIETTA NY
2007-10-15 585-754-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2007-10-15 585-754-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2007-10-15 585-754-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2007-10-15 585-754-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2007-10-15 585-754-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2007-10-15 585-754-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2007-10-15 585-754-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2007-10-15 585-754-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2007-10-01 585-203-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EROCHESTER NY
2007-10-01 585-444-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J HENRIETTA NY
2007-10-01 585-794-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2007-10-01 585-794-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ROCHESTER NY
2007-09-19 585-627-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ROCHESTER NY
2007-09-19 585-627-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ROCHESTER NY
2007-09-19 585-627-9XXX 9000–9999Assigned FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
2007-09-17 585-632-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BERGEN NY
2007-09-17 585-683-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-09-05 585-205-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MIDDLEPORT NY
2007-08-31 585-245-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 GENESEO NY
2007-08-31 585-294-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CALEDONIA NY
2007-08-29 585-672-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2007-08-27 585-773-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2007-08-27 585-773-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2007-08-27 585-773-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2007-08-27 585-773-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2007-08-16 585-763-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 WYOMING NY
2007-08-13 585-362-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-08-13 585-362-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2007-08-09 585-228-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 WARSAW NY
2007-08-09 585-252-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 PAVILION NY
2007-08-09 585-531-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NAPLES NY
2007-08-08 585-869-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 VICTOR NY
2007-08-06 585-297-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BATAVIA NY
2007-08-06 585-331-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBION NY
2007-08-06 585-641-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J EROCHESTER NY
2007-08-06 585-645-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WEBSTER NY
2007-08-06 585-689-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BLISS 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.