How to extract top-level domain name (TLD) from URL
dns, extract, parsing, python, url
Solution
No, there is no "intrinsic" way of knowing that (e.g.) `zap.co.it` is a subdomain (because Italy's registrar DOES sell domains such as `co.it`) while `zap.co.uk` isn't (because the UK's registrar DOESN'T sell domains such as `co.uk`, but only like `zap.co.uk`).
You'll just have to use an auxiliary table (or online source) to tell you which TLD's behave peculiarly like UK's and Australia's -- there's no way of divining that from just staring at the string without such extra semantic knowledge (of course it can change eventually, but if you can find a good online source that source will also change accordingly, one hopes!-).
Problem
how would you extract the domain name from a URL, excluding any subdomains? My initial simplistic attempt was: ``` '.'.join(urlparse.urlparse(url).netloc.split('.')[-2:]) ``` This works for http://www.foo.com, but not http://www.foo.com.au. Is there a way to do this properly without using special knowledge about valid TLDs (Top Level Domains) or country codes (because they change). thanks