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 419
OHIO BELL TEL CO 114
FRONTIER NORTH, INC. - OH 114
BRIGHTSPEED OF NORTHWEST OHIO, INC. 114
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 100
NEW CINGULAR WIRELESS PCS, LLC - IL 52
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 419-450 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TOLEDO OH
— 419-451 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PIONEER OH
— 419-452 0XXX2XXX3XXX4XXX5XXX8XXX · 5 holders which blocks → WINDSTREAM OHIO, LLC 0665 CHESTERFLD OH
— 419-453 not yet reported which blocks → OTTOVILLE MUTUAL TEL. CO. 0650 OTTOVILLE OH
— 419-454 1XXX5XXX6XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 BLOOMDALE OH
— 419-455 0XXX1XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 TIFFIN OH
— 419-456 not yet reported which blocks → HANSON COMMUNICATIONS OF OHIO, LLC-ORWELL 0649 GILBOA OH
— 419-457 1XXX5XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 RISINGSUN OH
— 419-458 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 WHARTON OH
— 419-459 2XXX3XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF MICHIGAN, INC. - OH 4418 COONEY OH
— 419-460 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 TOLEDO OH
— 419-461 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 TOLEDO OH
— 419-462 9XXX which blocks → FRONTIER NORTH, INC. - OH 0615 GALION OH
— 419-463 2XXX5XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FREMONT OH
— 419-465 0XXX1XXX6XXX7XXX8XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 MONROEVL OH
— 419-466 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TOLEDO OH
— 419-467 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TOLEDO OH
— 419-468 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 GALION OH
— 419-469 1XXX2XXX3XXX5XXX6XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 TOLEDO OH
— 419-470 9XXX which blocks → OHIO BELL TEL CO 9321 TOLEDO OH
— 419-471 not yet reported which blocks → OHIO BELL TEL CO 9321 TOLEDO OH
— 419-472 not yet reported which blocks → OHIO BELL TEL CO 9321 TOLEDO OH
— 419-473 not yet reported which blocks → OHIO BELL TEL CO 9321 TOLEDO OH
— 419-474 not yet reported which blocks → OHIO BELL TEL CO 9321 TOLEDO OH
— 419-475 not yet reported which blocks → OHIO BELL TEL CO 9321 TOLEDO OH
— 419-476 not yet reported which blocks → OHIO BELL TEL CO 9321 TOLEDO OH
— 419-477 not yet reported which blocks → HANSON COMMUNICATIONS OF OHIO, LLC-ORWELL 0649 MOUNT CORY OH
— 419-478 not yet reported which blocks → OHIO BELL TEL CO 9321 TOLEDO OH
— 419-479 8XXX which blocks → OHIO BELL TEL CO 9321 TOLEDO OH
— 419-480 7XXX9XXX which blocks → OHIO BELL TEL CO 9321 TOLEDO OH
— 419-481 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7158 TOLEDO OH
— 419-482 1XXX8XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 MAUMEE OH
— 419-483 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 BELLEVUE OH
— 419-484 0XXX1XXX3XXX4XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 BELLEVUE OH
— 419-485 7XXX which blocks → FRONTIER NORTH, INC. - OH 0615 MONTPELIER OH
— 419-486 9XXX which blocks → OHIO BELL TEL CO 9321 TOLEDO OH
— 419-487 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HICKSVILLE OH
— 419-488 not yet reported which blocks → OTTOVILLE MUTUAL TEL. CO. 0650 CLOVERDALE OH
— 419-490 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 TOLEDO OH
— 419-491 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HOLLAND OH
— 419-492 0XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 NEWWSHNGTN OH
— 419-494 0XXX2XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BOWLNGGREN OH
— 419-495 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 WILSHIWREN OH
— 419-496 0XXX2XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ASHLAND OH
— 419-497 1XXX4XXX6XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 JEWELL OH
— 419-499 7XXX which blocks → FRONTIER NORTH, INC. - OH 0615 MILAN OH
— 419-502 not yet reported which blocks → ONVOY, LLC - OH 464C SANDUSKY OH
— 419-503 4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANDUSKY OH
— 419-504 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANDUSKY OH
— 419-506 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ANTWERP 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.