NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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, all time — NPA 740
FRONTIER NORTH, INC. - OH 123
OHIO BELL TEL CO 105
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 82
AERIAL COMMUNICATIONS, INC. 65
LEVEL 3 COMMUNICATIONS, LLC - OH 63
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
— 740-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 740-725 4XXX6XXX7XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 MARION OH
— 740-726 0XXX1XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → FRONTIER NORTH, INC. - OH 0615 WALDO OH
— 740-732 8XXX which blocks → FRONTIER NORTH, INC. - OH 0615 CALDWELL OH
— 740-733 1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 SMITHFIELD OH
— 740-734 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 LANCASTER OH
— 740-735 not yet reported which blocks → SPOK, INC. 6630 ZANESVILLE OH
— 740-736 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MARION OH
— 740-738 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F MARTISFRRY OH
— 740-739 4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 PATASKALA OH
— 740-742 5XXX6XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 POMEROY OH
— 740-743 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 SOMERSET OH
— 740-745 0XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → WINDSTREAM OHIO, LLC 0665 ST LOUISVL OH
— 740-746 1XXX3XXX5XXX6XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 SUGARGROVE OH
— 740-747 4XXX6XXX7XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 ASHLEY OH
— 740-749 1XXX2XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 WATERTOWN OH
— 740-753 8XXX which blocks → OHIO BELL TEL CO 9321 NELSONVL OH
— 740-754 0XXX4XXX7XXX8XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 DRESDEN OH
— 740-756 2XXX3XXX6XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 CARROLL OH
— 740-757 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 SOMERTON OH
— 740-758 not yet reported which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 FAIRVIEW OH
— 740-762 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → OHIO BELL TEL CO 9321 MURRAYCITY OH
— 740-763 5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM OHIO, LLC 0665 HANOVER OH
— 740-765 0XXX1XXX2XXX3XXX6XXX7XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 RICHMOND OH
— 740-767 0XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 GLOUSTER OH
— 740-768 3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 BERGHOLZ OH
— 740-769 0XXX6XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 DLVLMTPLNT OH
— 740-772 not yet reported which blocks → CHILLICOTHE TEL. CO. 0597 CHILLICOTH OH
— 740-773 not yet reported which blocks → CHILLICOTHE TEL. CO. 0597 CHILLICOTH OH
— 740-774 not yet reported which blocks → CHILLICOTHE TEL. CO. 0597 CHILLICOTH OH
— 740-775 not yet reported which blocks → CHILLICOTHE TEL. CO. 0597 CHILLICOTH OH
— 740-776 5XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
— 740-777 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LANCASTER OH
— 740-778 0XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
— 740-779 not yet reported which blocks → CHILLICOTHE TEL. CO. 0597 CHILLICOTH OH
— 740-782 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 MORRISTOWN OH
— 740-783 7XXX8XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 DEXTERCITY OH
— 740-787 0XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → WINDSTREAM OHIO, LLC 0665 GRATIOT OH
— 740-788 2XXX which blocks → WINDSTREAM OHIO, LLC 0665 NEWARK OH
— 740-795 8XXX which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 POWHATANPT OH
— 740-796 1XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 ADAMSVILLE OH
— 740-797 5XXX6XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 THE PLAINS OH
— 740-802 3XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 MARION OH
— 740-803 4XXX5XXX6XXX7XXX8XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 DELAWARE OH
— 740-804 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CHILLICOTH OH
— 740-808 5XXX8XXX9XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LANCASTER OH
— 740-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 740-814 1XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWARK OH
— 740-815 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 DELAWARE OH
— 740-816 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 DELAWARE OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.