Download ((install)) - Cty.dat

Most modern logging programs have a built-in "Check for Updates" feature that handles this automatically. However, if you need to do it manually: the file from the link above.

Downloading and Updating Your Amateur Radio cty.dat Files If you are an amateur radio operator involved in contesting or DXing, you know that the file is the backbone of your logging software. This file provides the essential prefix-to-country mapping that allows programs like N1MM+, Winlog32, and DXKeeper to accurately identify DXCC entities in real-time. Where to Download the Latest cty.dat

Download the custom version matching your logger from the Country Files site. cty.dat download

You may encounter these related files:

Many modern loggers (e.g., Log4OM, N1MM Logger+, DXKeeper) have a “Update Country Files” button. This automatically performs a cty.dat download from the official source. Use this method if you are unsure about manual installation. Most modern logging programs have a built-in "Check

the installation directory of your logging software (e.g., C:\N1MM Logger+ ). Overwrite the existing cty.dat with the new version. Restart your software to initialize the new data. Pro-Tip: Which Version Should You Use?

Without this file, software cannot accurately identify a transmission's origin. The data provided by cty.dat includes: This automatically performs a cty

If you've found a reliable source for cty.dat, follow these steps to download and install the file:

The specific broadcast zones defined by CQ Amateur Radio Magazine.

To avoid potential risks, follow these best practices when downloading cty.dat: