>The dotmobiregistry.net domain, and whois.dotmobiregisry.net hostname, has been pointed to sinkhole systems provided by ShadowServer that now proxy the legitimate WHOIS response for .mobi domains.
If those domains were meant to be deprecated should be better to return a 404. Keeping them active and working like normal reduces the insensitive to switch to the legitimate domain.
Whois doesn't support HTTP status codes, but the shadowserver sinkhole responds with:
Domain not found.
>>> Please update your code or tell your system administrator to use whois.nic.mobi, the authoritative WHOIS server for this domain. <<<
>The dotmobiregistry.net domain, and whois.dotmobiregisry.net hostname, has been pointed to sinkhole systems provided by ShadowServer that now proxy the legitimate WHOIS response for .mobi domains.
If those domains were meant to be deprecated should be better to return a 404. Keeping them active and working like normal reduces the insensitive to switch to the legitimate domain.