IP ... ... via ipip.net IP ... ... via myip.la DNS ... ... via ipip.ooo why?

IPv4 ... ... via ipip.ooo IPv6 ... ... via ipip.ooo $ curl ipip.ooo $ curl -4 ipip.ooo $ curl -6 ipip.ooo $ curl ipip.ooo/country $ curl -L ipip.ooo/dns $ curl -L ipip.ooo/dnscountry