NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
— 740-567 1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 LEWISVILLE OH
— 740-568 8XXX which blocks → OHIO BELL TEL CO 9321 MARIETTA OH
— 740-569 2XXX3XXX5XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 BREMEN OH
— 740-572 3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 WSNGTNCTHS OH
— 740-574 3XXX7XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
— 740-576 0XXX1XXX6XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 STCLAIRSVL OH
— 740-578 0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 7 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 GALLIPOLIS OH
— 740-579 1XXX2XXX6XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 STCLAIRSVL OH
— 740-581 3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CALDWELL OH
— 740-582 4XXX5XXX6XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CADIZ OH
— 740-583 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOGAN OH
— 740-584 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAMBRIDGE OH
— 740-585 0XXX1XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 LOWERSALEM OH
— 740-586 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 ZANESVILLE OH
— 740-587 not yet reported which blocks → WINDSTREAM OHIO, LLC 0665 GRANVILLE OH
— 740-588 3XXX which blocks → OHIO BELL TEL CO 9321 ZANESVILLE OH
— 740-589 0XXX1XXX2XXX6XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 ATHENS OH
— 740-591 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ATHENS OH
— 740-592 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 ATHENS OH
— 740-593 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 ATHENS OH
— 740-594 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 ATHENS OH
— 740-595 0XXX1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → FRONTIER NORTH, INC. - OH 0615 RADNOR OH
— 740-596 6XXX7XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 MCARTHUR OH
— 740-597 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 ATHENS OH
— 740-598 0XXX2XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - OH 0615 BRILLIANT OH
— 740-599 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 DANVL OH
— 740-600 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CHILLICOTH OH
— 740-601 4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CIRCLEVL OH
— 740-602 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DELAWARE OH
— 740-603 7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOGAN OH
— 740-604 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LONDON OH
— 740-605 4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWLXINGTN OH
— 740-606 3XXX4XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WSNGTNCTHS OH
— 740-607 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ZANESVILLE OH
— 740-609 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C MARTISFRRY OH
— 740-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 740-621 0–9 XXXall 10 · 7 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 NEWLXINGTN OH
— 740-622 not yet reported which blocks → OHIO BELL TEL CO 9321 COSHOCTON OH
— 740-623 not yet reported which blocks → OHIO BELL TEL CO 9321 COSHOCTON OH
— 740-625 1XXX2XXX3XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 CENTERBURG OH
— 740-626 0XXX8XXX9XXX · 3 holders which blocks → CHILLICOTHE TEL. CO. 0597 BOURNEVL OH
— 740-627 3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 MT VERNON OH
— 740-632 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STEUBENVL OH
— 740-633 not yet reported which blocks → OHIO BELL TEL CO 9321 MARTISFRRY OH
— 740-634 0XXX8XXX9XXX · 3 holders which blocks → CHILLICOTHE TEL. CO. 0597 BAINBDG OH
— 740-635 not yet reported which blocks → OHIO BELL TEL CO 9321 MARTISFRRY OH
— 740-636 none assigned yet which blocks → OHIO BELL TEL CO 9321 WSNGTNCTHS OH
— 740-638 0XXX7XXX · 2 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 CUMBERLAND OH
— 740-639 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CARROLL OH
— 740-642 7XXX8XXX · 2 holders which blocks → CHILLICOTHE TEL. CO. 0597 KINGSTON OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.