Is 0.0.0.0 a valid IP address?

Question

Is 0.0.0.0 a valid IP address? I want my program to be able to store it as an indication that no address is in use, but this won\'t work if it\'s actually valid.

Answer 1

Yes, it is an IP address but it is reserved.

0.0.0.0/8 - Addresses in this block refer to source hosts on "this" network. Address 0.0.0.0/32 may be used as a source address for this host on this network; other addresses within 0.0.0.0/8 may be used to refer to specified hosts on this network