john-kurkowski / tldextract

Accurately separates a URL’s subdomain, domain, and public suffix, using the Public Suffix List (PSL).

publicsuffix / list

The Public Suffix List

weppos / publicsuffix-ruby

Domain name parser for Ruby based on the Public Suffix List.

peerigon / parse-domain

Splits a hostname into subdomains, domain and (effective) top-level domains.