Ipv4

IP to ASN Mapping - Team Cymru

http://www.team-cymru.org/Services/ip-to-asn.html How to find out AS number for an IP address

IP to ASN Mapping - Team Cymru

http://www.team-cymru.org/Services/ip-to-asn.html How to find out AS number for an IP address

IP to ASN Mapping - Team Cymru

http://www.team-cymru.org/Services/ip-to-asn.html How to find out AS number for an IP address

http://cr.yp.to/djbdns/ipv6mess.html

http://cr.yp.to/djbdns/ipv6mess.html Criticism (a fair one, IMHO) for IPv6 from DJB

IPv4 Address Report

http://www.potaroo.net/tools/ipv4/index.html notes about IPv4 extinction and a move to IPv6