[한국] NIC
http://www.nic.or.kr
http://ipwhois.nic.or.kr/

[아시아] APNIC
http://www.apnic.net
http://www.apnic.net/apnic-bin/whois.pl

[유럽] RIPE NCC
http://www.ripe.net
http://www.ripe.net/fcgi-bin/whois

[아프리카] AfriNIC
http://www.afrinic.net
http://www.afrinic.net/cgi-bin/whois

[북아메리카] ARIN
http://www.arin.net
http://ws.arin.net/whois

[남아메리카] LACNIC
http://www.lacnic.net
http://www.lacnic.net/cgi-bin/lacnic/whois