Insert your IP or ASN in the textbox above. IPv4 [OPTIONAL COMMENT]Eg. '4.2.2.2 2004-12-10 11:33:21 GMT' AS# Eg. 'AS23028' IPv6 [OPTIONAL COMMENT] --- snip snip --- 2001:5c0:8fff:fffe::ff6 2004-12-10 11:32:01 GMT 2001:5c0:8fff:fffe::ff7 2004-12-10 11:33:21 GMT --- snip snip --- Both IPv4 and IPv6 addresses are supported. However, only one address family is permitted per query. In other words, you may NOT intermix IPv4 and IPv6 addresses.
[Team Cymru] [ASN Lookup docs]