Address (Host or Network) Netmask (i.e. 24) Netmask for sub/supernet (optional)
/ move to:
 



Address:   192.168.128.0         11000000.10101000.10 000000.00000000
Netmask: 255.255.192.0 = 18 11111111.11111111.11 000000.00000000
Wildcard: 0.0.63.255 00000000.00000000.00 111111.11111111
=> Network: 192.168.128.0/18 11000000.10101000.10 000000.00000000 (Class C)
Broadcast: 192.168.191.255 11000000.10101000.10 111111.11111111
HostMin: 192.168.128.1 11000000.10101000.10 000000.00000001
HostMax: 192.168.191.254 11000000.10101000.10 111111.11111110
Hosts/Net: 16382 (Private Internet)


Thanks to http://www.netzwerkinfo.de/daemons/ for this ip calculator icon :-)
Version 0.35.2 2005/07/07

Download
07/27/2006 Security information
Screenshot (ipcalc works also at the prompt)
CGI wrapper that produced this page.
Archive
Have a look in the archives for the new version 0.41, with the capability to deaggregate network ranges
How to run this under windows
Debian users can apt-get install ipcalc
2000-2011 Krischan Jodies

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