ISO 3166-1 numeric code
Sign in to savethree-digit numeric code to identify countries
In the Vinony graph
Vinony's link graph records 311 inbound references to ISO 3166-1 numeric code, and connects out to Myanmar, Serbia and Montenegro and UN M49.
Vinony files it under Country codes, ISO 3166 and Location codes.
Vinony links it to 15 Wikipedia language editions.