Man pages matching name locale::subcountry::codes in section 3pm:

Locale::SubCountry::Codes.3pm.en	debian 10 / liblocale-subcountry-perl
Locale::SubCountry::Codes.3pm.en	debian 11 / liblocale-subcountry-perl
Locale::SubCountry::Codes.3pm.en	debian 12 / liblocale-subcountry-perl