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
— 740-643 3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 ARABIA OH
— 740-649 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHILLICOTH OH
— 740-650 2XXX5XXX7XXX8XXX · 3 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F STCLAIRSVL OH
— 740-652 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 LANCASTER OH
— 740-653 not yet reported which blocks → OHIO BELL TEL CO 9321 LANCASTER OH
— 740-654 not yet reported which blocks → OHIO BELL TEL CO 9321 LANCASTER OH
— 740-655 4XXX5XXX6XXX8XXX · 4 holders which blocks → CHILLICOTHE TEL. CO. 0597 HALLSVILLE OH
— 740-656 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CHILLICOTH OH
— 740-657 9XXX which blocks → FRONTIER NORTH, INC. - OH 0615 CHESHIRCTR OH
— 740-658 0XXX2XXX6XXX7XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 FREEPORT OH
— 740-659 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 GLENFORD OH
— 740-662 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 GUYSVILLE OH
— 740-663 7XXX which blocks → CHILLICOTHE TEL. CO. 0597 MASSIEVL OH
— 740-664 0XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 NEWMRSHFLD OH
— 740-666 4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 OSTRANDER OH
— 740-667 not yet reported which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 COOLVILLE OH
— 740-668 1XXX which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 MARTINSBG OH
— 740-669 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 WILKESVL OH
— 740-670 none assigned yet which blocks → WINDSTREAM OHIO, LLC 0665 NEWARK OH
— 740-671 5XXX7XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 BELLAIRE OH
— 740-674 0XXX1XXX2XXX3XXX8XXX9XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 PHILO OH
— 740-676 not yet reported which blocks → OHIO BELL TEL CO 9321 BELLAIRE OH
— 740-678 4XXX5XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 BARLOW OH
— 740-679 6XXX7XXX8XXX · 2 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 QUAKERCITY OH
— 740-680 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAMBRIDGE OH
— 740-681 0XXX which blocks → OHIO BELL TEL CO 9321 LANCASTER OH
— 740-682 2XXX5XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 OAK HILL OH
— 740-683 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ZANESVILLE OH
— 740-684 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWLXINGTN OH
— 740-685 4XXX which blocks → FRONTIER NORTH, INC. - OH 0615 BYESVILLE OH
— 740-686 not yet reported which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 CENTERVL OH
— 740-687 not yet reported which blocks → OHIO BELL TEL CO 9321 LANCASTER OH
— 740-689 5XXX7XXX which blocks → OHIO BELL TEL CO 9321 LANCASTER OH
— 740-694 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 FREDERCKTN OH
— 740-695 not yet reported which blocks → OHIO BELL TEL CO 9321 STCLAIRSVL OH
— 740-696 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - OH 0615 SHADE OH
— 740-697 1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 ROSEVILLE OH
— 740-698 8XXX which blocks → FRONTIER NORTH, INC. - OH 0615 ALBANY OH
— 740-699 none assigned yet which blocks → OHIO BELL TEL CO 9321 STCLAIRSVL OH
— 740-700 not yet reported which blocks → OH
— 740-701 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 CHILLICOTH OH
— 740-702 not yet reported which blocks → CHILLICOTHE TEL. CO. 0597 CHILLICOTH OH
— 740-703 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 CHILLICOTH OH
— 740-704 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 ZANESVILLE OH
— 740-705 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 CAMBRIDGE OH
— 740-706 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 MARIETTA OH
— 740-707 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 ATHENS OH
— 740-708 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 WAVERLY OH
— 740-709 none assigned yet which blocks → METROPCS, INC. 5562 GALLIPOLIS OH
— 740-710 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 JACKSON 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.