A plain mobi.whois.arpa. CNAME whois.nic.mobi could've already solved the issue. But getting everyone to agree and adopt something like that is hard. Altho

A plain mobi.whois.arpa. CNAME whois.nic.mobi could've already solved the issue. But getting everyone to agree and adopt something like that is hard. Although as fanf2 points out below, it seems you could also just start with the IANA whois server. Querying https://www.iana.org/whois https://www.iana.org/whois for `mobi` will return `whois: whois.nic.mobi` as part of the answer.