NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

375 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 585-765 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 LYNDONVL NY
— 585-766 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
— 585-768 not yet reported which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 LE ROY NY
— 585-770 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 4 holders which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
— 585-771 0XXX7XXX which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
— 585-775 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
— 585-777 not yet reported which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
— 585-781 none assigned yet which blocks → PAETEC ITEL, LLC 829J ROCHESTER NY
— 585-783 not yet reported which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
— 585-784 0XXX which blocks → LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 ROCHESTER NY
— 585-785 2XXX3XXX4XXX · 2 holders which blocks → LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 ROCHESTER NY
— 585-786 7XXX which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 WARSAW NY
— 585-787 4XXX which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 W WEBSTER NY
— 585-797 3XXX4XXX5XXX7XXX8XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ROCHESTER NY
— 585-798 7XXX which blocks → VERIZON NEW YORK, INC. 9104 MEDINA NY
— 585-800 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C BOLIVAR NY
— 585-801 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WELLSVILLE NY
— 585-805 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → VERIZON NEW YORK, INC. 9104 EASTAURORA NY
— 585-806 5XXX6XXX8XXX which blocks → PAETEC ITEL, LLC 829J OLEAN NY
— 585-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 585-813 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 BATAVIA NY
— 585-815 0XXX2XXX3XXX4XXX5XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BATAVIA NY
— 585-820 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
— 585-865 not yet reported which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
— 585-866 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C MIDDLEPORT NY
— 585-869 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J VICTOR NY
— 585-872 not yet reported which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 WEBSTER NY
— 585-880 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
— 585-883 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC- NY 384C MT MORRIS NY
— 585-889 not yet reported which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 SCOTTSVL NY
— 585-899 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 EROCHESTER NY
— 585-900 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC- NY 384C CHAFFEE NY
— 585-902 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ALDEN NY
— 585-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 585-919 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J CANANDAGUA NY
— 585-921 not yet reported which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
— 585-922 not yet reported which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
— 585-924 not yet reported which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 VICTOR NY
— 585-928 0XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 BOLIVAR NY
— 585-933 0XXX1XXX2XXX4XXX5XXX9XXX · 2 holders which blocks → TERRA NOVA TELECOM INC. 145J OLEAN NY
— 585-935 1XXX7XXX · 2 holders which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
— 585-936 not yet reported which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
— 585-937 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → ONVOY SPECTRUM, LLC 624H ALDEN NY
— 585-939 4XXX5XXX6XXX7XXX · 2 holders which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
— 585-943 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
— 585-944 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
— 585-948 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 OAKFIELD NY
— 585-950 not yet reported which blocks → NY
— 585-955 3XXX which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
— 585-956 not yet reported which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 XXXXXXXXXX NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.