Hi Sergey,
RIPE NCC publishes the list of countries and corresponding RIRs here: https://www.ripe.net/participate/internet-governance/internet-technical-comm... <https://www.ripe.net/participate/internet-governance/internet-technical-community/the-rir-system/list-of-country-codes-and-rirs>.
Unfortunately, it's an HTML page and not a plain text/CSV/JSON/XML (or any other format one can parse automatically). Does IANA (or any other body) publish it this way? Actually, what would be the proper way to map a country (or country code) to the respective RIR?
When you read the first line on that page, it states: “We maintain a list of ISO 3166 defined country codes on our FTP Site.” -> ftp://ftp.ripe.net/iso3166-countrycodes.txt <ftp://ftp.ripe.net/iso3166-countrycodes.txt> . That might help? — Hartelijke groeten / Best regards, Peter van Roosmalen