OpenPort
https://play.google.com/store/apps/details?id=com.rodican.dnschecker
IpChecker
https://play.google.com/store/apps/details?id=com.rodican.checkiprange
HostChecker
https://play.google.com/store/apps/details?id=com.rodican.hostchecker
https://play.google.com/store/apps/details?id=com.rodican.dnschecker
IpChecker
https://play.google.com/store/apps/details?id=com.rodican.checkiprange
HostChecker
https://play.google.com/store/apps/details?id=com.rodican.hostchecker