http://mnaxv2amcoysm63cdjtjmfown65muwicvle4n3cxjxp6azsyphe4k5ad.onion
IP Checker can be useful for those attacking IP subnets (CIDR, /24, /23, 22, ect), you can scan a subnet and then use "Attack Groups" to only attack the IPs that responded to IP Checker, to there corresponding open ports, making attacks on subnets much more efficient.