The problem is thatwill SELL you an official list of the country codes for a lot of money if you just type 3166-1 into the search box. I went to searched for ccTLD (country code top level domain) and got a FREE iso.org listing of the country codes. It's at
Monserrat, according to the above reference.
Michael D. Sullivan Bethesda, MD (USA) (Replace "example.invalid" with "com" in my address.)