in-addr.arpa not extracting as expected

[smellyspice]

I've seen this in two different modules now, not sure why this is:

Code:

print(tldextract.extract('subdomain.domain.com'))
print(tldextract.extract('8.8.8.8.in-addr.arpa'))

Result:

ExtractResult(subdomain='subdomain', domain='domain', suffix='com')
ExtractResult(subdomain='8.8.8', domain='8', suffix='in-addr.arpa')

I would have expected in-addr.arpa to return something like:

ExtractResult(subdomain='8.8.8.8', domain='in-addr', suffix='arpa')

What am I doing wrong? :)

[john-kurkowski]

in-addr.arpa is indeed a public suffix, according to the list. See also this project's FAQ.

(Interesting suffix. It's near the top of the list. It's been there for at least 15 years, according to the blame. An oldie!)