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



Address:   10.0.0.0              00001010 .00000000.00000000.00000000
Netmask: 255.0.0.0 = 8 11111111 .00000000.00000000.00000000
Wildcard: 0.255.255.255 00000000 .11111111.11111111.11111111
=> Network: 10.0.0.0/8 00001010 .00000000.00000000.00000000 (Class A)
Broadcast: 10.255.255.255 00001010 .11111111.11111111.11111111
HostMin: 10.0.0.1 00001010 .00000000.00000000.00000001
HostMax: 10.255.255.254 00001010 .11111111.11111111.11111110
Hosts/Net: 16777214 (Private Internet)

Subnets Netmask: 255.224.0.0 = 11 11111111.111 00000.00000000.00000000
Wildcard: 0.31.255.255 00000000.000 11111.11111111.11111111
Network: 10.0.0.0/11 00001010.000 00000.00000000.00000000 (Class A)
Broadcast: 10.31.255.255 00001010.000 11111.11111111.11111111
HostMin: 10.0.0.1 00001010.000 00000.00000000.00000001
HostMax: 10.31.255.254 00001010.000 11111.11111111.11111110
Hosts/Net: 2097150 (Private Internet)

Network: 10.32.0.0/11 00001010.001 00000.00000000.00000000 (Class A)
Broadcast: 10.63.255.255 00001010.001 11111.11111111.11111111
HostMin: 10.32.0.1 00001010.001 00000.00000000.00000001
HostMax: 10.63.255.254 00001010.001 11111.11111111.11111110
Hosts/Net: 2097150 (Private Internet)

Network: 10.64.0.0/11 00001010.010 00000.00000000.00000000 (Class A)
Broadcast: 10.95.255.255 00001010.010 11111.11111111.11111111
HostMin: 10.64.0.1 00001010.010 00000.00000000.00000001
HostMax: 10.95.255.254 00001010.010 11111.11111111.11111110
Hosts/Net: 2097150 (Private Internet)

Network: 10.96.0.0/11 00001010.011 00000.00000000.00000000 (Class A)
Broadcast: 10.127.255.255 00001010.011 11111.11111111.11111111
HostMin: 10.96.0.1 00001010.011 00000.00000000.00000001
HostMax: 10.127.255.254 00001010.011 11111.11111111.11111110
Hosts/Net: 2097150 (Private Internet)

Network: 10.128.0.0/11 00001010.100 00000.00000000.00000000 (Class A)
Broadcast: 10.159.255.255 00001010.100 11111.11111111.11111111
HostMin: 10.128.0.1 00001010.100 00000.00000000.00000001
HostMax: 10.159.255.254 00001010.100 11111.11111111.11111110
Hosts/Net: 2097150 (Private Internet)

Network: 10.160.0.0/11 00001010.101 00000.00000000.00000000 (Class A)
Broadcast: 10.191.255.255 00001010.101 11111.11111111.11111111
HostMin: 10.160.0.1 00001010.101 00000.00000000.00000001
HostMax: 10.191.255.254 00001010.101 11111.11111111.11111110
Hosts/Net: 2097150 (Private Internet)

Network: 10.192.0.0/11 00001010.110 00000.00000000.00000000 (Class A)
Broadcast: 10.223.255.255 00001010.110 11111.11111111.11111111
HostMin: 10.192.0.1 00001010.110 00000.00000000.00000001
HostMax: 10.223.255.254 00001010.110 11111.11111111.11111110
Hosts/Net: 2097150 (Private Internet)

Network: 10.224.0.0/11 00001010.111 00000.00000000.00000000 (Class A)
Broadcast: 10.255.255.255 00001010.111 11111.11111111.11111111
HostMin: 10.224.0.1 00001010.111 00000.00000000.00000001
HostMax: 10.255.255.254 00001010.111 11111.11111111.11111110
Hosts/Net: 2097150 (Private Internet)

Subnets: 8
Hosts: 16777200

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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