This is the command fdnsname that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
fdnsname - resolve an IPv4 or IPv6 address to a hostname
fdnsname <IP address>
fdnsname will attempt to look up a single hostname for IP address (which is an IPv4
address in dotted-quad format or an IPv6 address in colon-seperated format). If one is
found, it is printed to standard output and the program exits with return code 0. If not,
nothing is printed and the program exits with return code 1.
Use fdnsname online using onworks.net services