Since I am using the Retevis RT3S dual band DMR radio, I wanted to import all worldwide users into its database. I found the following site:
Click on DMR User ID List, space separated fields (ID call name)
The format is not the same as what is used by the RT3S, though it is CSV, but the columns are different. I wrote a small Python program to convert it. The resulting file, which will be attached to this post, does import correctly into the Retevis software, and I suspect will work with other Retevis.TYT radios. I have not tried to insert my new file into the radio, but I don't expect any trouble. Stay tuned for an update and video!
I will update this file every few months...