W3KM ADIF Prefix Calculator 

ADIF Prefix Calculator by W3KM

ADIF_PrefixCalc v1.2 download - 08 Aug 2020.
Click this file and select `Run` to start the installation process and follow the prompts.
Calculator pix  Help file

Visit the UBA International Prefix Hunt site and the prefix results page.

Questions, comments or problems: w3km at verizon dot net