Netmask Websites
ipaddressguide.com
Free IP address tools for ping, traceroute, reverse DNS lookup, CIDR conversion, Netmask conversion, decimal conversion and IP lookup for IPv4 and IPv6
95,924 
$ 139,680.00
coderstoolbox.net
Toolbox for programmers with all the little things you can never find
273,175 $ 30,240.00