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
— 740-393 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 MT VERNON OH
— 740-394 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → OHIO BELL TEL CO 9321 SHAWNEE OH
— 740-395 0XXX1XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 JACKSON OH
— 740-396 1XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARION OH
— 740-397 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 MT VERNON OH
— 740-398 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MT VERNON OH
— 740-399 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 MT VERNON OH
— 740-401 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → OHIO BELL TEL CO 9321 BELPRE OH
— 740-404 9XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 NEWARK OH
— 740-405 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 NEWARK OH
— 740-406 2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 WSNGTNCTHS OH
— 740-407 1XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 LANCASTER OH
— 740-408 5XXX8XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 ZANESVILLE OH
— 740-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 740-412 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CIRCLEVL OH
— 740-415 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LANCASTER OH
— 740-417 1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DELAWARE OH
— 740-420 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 CIRCLEVL OH
— 740-422 3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → XO OHIO, INC. 7520 LANCASTER OH
— 740-423 none assigned yet which blocks → OHIO BELL TEL CO 9321 BELPRE OH
— 740-425 6XXX7XXX8XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 BARNESVL OH
— 740-426 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 7 holders which blocks → OHIO BELL TEL CO 9321 JEFFERSNVL OH
— 740-427 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 GAMBIER OH
— 740-428 0XXX1XXX2XXX3XXX5XXX7XXX8XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CHESHIRE OH
— 740-432 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 CAMBRIDGE OH
— 740-435 4XXX5XXX6XXX7XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 CAMBRIDGE OH
— 740-437 2XXX3XXX8XXX9XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 BLOOMINGBG OH
— 740-439 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 CAMBRIDGE OH
— 740-441 none assigned yet which blocks → OHIO BELL TEL CO 9321 GALLIPOLIS OH
— 740-446 not yet reported which blocks → OHIO BELL TEL CO 9321 GALLIPOLIS OH
— 740-448 0XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 AMESVILLE OH
— 740-449 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J STCLAIRSVL OH
— 740-450 not yet reported which blocks → OHIO BELL TEL CO 9321 ZANESVILLE OH
— 740-452 not yet reported which blocks → OHIO BELL TEL CO 9321 ZANESVILLE OH
— 740-453 not yet reported which blocks → OHIO BELL TEL CO 9321 ZANESVILLE OH
— 740-454 not yet reported which blocks → OHIO BELL TEL CO 9321 ZANESVILLE OH
— 740-455 1XXX which blocks → OHIO BELL TEL CO 9321 ZANESVILLE OH
— 740-456 2XXX3XXX7XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
— 740-457 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 STEUBENVL OH
— 740-458 8XXX9XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 CLARINGTON OH
— 740-465 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - OH 0615 MORRAL OH
— 740-467 4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 MILLERSPT OH
— 740-468 0XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 PLEASANTVL OH
— 740-472 4XXX6XXX7XXX8XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 WOODSFIELD OH
— 740-473 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → OHIO BELL TEL CO 9321 NEWPORT OH
— 740-474 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 CIRCLEVL OH
— 740-475 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J LANCASTER OH
— 740-477 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 CIRCLEVL OH
— 740-479 3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 IRONTON OH
— 740-482 0XXX4XXX6XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 NEVADA 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.