Use Case

• check an IP is within one or more IP range
• answer is command's return code
• support named IP ranges, see cidr.txt
• list all named IP range an IP is in
• good for scripting
• IPv4, IPv6

Examples

• Check an IP is in a subnet
  • subnet 192.168.1.1 192.168.1.0/24
• Check by well known network name
  • subnet 192.168.100.100 class-C
• Check multiple ranges
  • subnet 192.168.100.100 class-C 192.168.100.0/24
  • one match sufficient
• List named networks
  • subnet 10.8.1.0
  • output:

    private-net
    rfc1918
    class-A
    priv-class-A
    

issues

Please submit issues via PR to some file <TITLE>.txt or <TITLE>.md on issues branch.