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



Address:   172.16.0.0            10101100.00010000.000 00000.00000000
Netmask: 255.255.224.0 = 19 11111111.11111111.111 00000.00000000
Wildcard: 0.0.31.255 00000000.00000000.000 11111.11111111
=> Network: 172.16.0.0/19 10101100.00010000.000 00000.00000000 (Class B)
Broadcast: 172.16.31.255 10101100.00010000.000 11111.11111111
HostMin: 172.16.0.1 10101100.00010000.000 00000.00000001
HostMax: 172.16.31.254 10101100.00010000.000 11111.11111110
Hosts/Net: 8190 (Private Internet)

Subnets Netmask: 255.255.255.0 = 24 11111111.11111111.11111111 .00000000
Wildcard: 0.0.0.255 00000000.00000000.00000000 .11111111
Network: 172.16.0.0/24 10101100.00010000.00000000 .00000000 (Class B)
Broadcast: 172.16.0.255 10101100.00010000.00000000 .11111111
HostMin: 172.16.0.1 10101100.00010000.00000000 .00000001
HostMax: 172.16.0.254 10101100.00010000.00000000 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.1.0/24 10101100.00010000.00000001 .00000000 (Class B)
Broadcast: 172.16.1.255 10101100.00010000.00000001 .11111111
HostMin: 172.16.1.1 10101100.00010000.00000001 .00000001
HostMax: 172.16.1.254 10101100.00010000.00000001 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.2.0/24 10101100.00010000.00000010 .00000000 (Class B)
Broadcast: 172.16.2.255 10101100.00010000.00000010 .11111111
HostMin: 172.16.2.1 10101100.00010000.00000010 .00000001
HostMax: 172.16.2.254 10101100.00010000.00000010 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.3.0/24 10101100.00010000.00000011 .00000000 (Class B)
Broadcast: 172.16.3.255 10101100.00010000.00000011 .11111111
HostMin: 172.16.3.1 10101100.00010000.00000011 .00000001
HostMax: 172.16.3.254 10101100.00010000.00000011 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.4.0/24 10101100.00010000.00000100 .00000000 (Class B)
Broadcast: 172.16.4.255 10101100.00010000.00000100 .11111111
HostMin: 172.16.4.1 10101100.00010000.00000100 .00000001
HostMax: 172.16.4.254 10101100.00010000.00000100 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.5.0/24 10101100.00010000.00000101 .00000000 (Class B)
Broadcast: 172.16.5.255 10101100.00010000.00000101 .11111111
HostMin: 172.16.5.1 10101100.00010000.00000101 .00000001
HostMax: 172.16.5.254 10101100.00010000.00000101 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.6.0/24 10101100.00010000.00000110 .00000000 (Class B)
Broadcast: 172.16.6.255 10101100.00010000.00000110 .11111111
HostMin: 172.16.6.1 10101100.00010000.00000110 .00000001
HostMax: 172.16.6.254 10101100.00010000.00000110 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.7.0/24 10101100.00010000.00000111 .00000000 (Class B)
Broadcast: 172.16.7.255 10101100.00010000.00000111 .11111111
HostMin: 172.16.7.1 10101100.00010000.00000111 .00000001
HostMax: 172.16.7.254 10101100.00010000.00000111 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.8.0/24 10101100.00010000.00001000 .00000000 (Class B)
Broadcast: 172.16.8.255 10101100.00010000.00001000 .11111111
HostMin: 172.16.8.1 10101100.00010000.00001000 .00000001
HostMax: 172.16.8.254 10101100.00010000.00001000 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.9.0/24 10101100.00010000.00001001 .00000000 (Class B)
Broadcast: 172.16.9.255 10101100.00010000.00001001 .11111111
HostMin: 172.16.9.1 10101100.00010000.00001001 .00000001
HostMax: 172.16.9.254 10101100.00010000.00001001 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.10.0/24 10101100.00010000.00001010 .00000000 (Class B)
Broadcast: 172.16.10.255 10101100.00010000.00001010 .11111111
HostMin: 172.16.10.1 10101100.00010000.00001010 .00000001
HostMax: 172.16.10.254 10101100.00010000.00001010 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.11.0/24 10101100.00010000.00001011 .00000000 (Class B)
Broadcast: 172.16.11.255 10101100.00010000.00001011 .11111111
HostMin: 172.16.11.1 10101100.00010000.00001011 .00000001
HostMax: 172.16.11.254 10101100.00010000.00001011 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.12.0/24 10101100.00010000.00001100 .00000000 (Class B)
Broadcast: 172.16.12.255 10101100.00010000.00001100 .11111111
HostMin: 172.16.12.1 10101100.00010000.00001100 .00000001
HostMax: 172.16.12.254 10101100.00010000.00001100 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.13.0/24 10101100.00010000.00001101 .00000000 (Class B)
Broadcast: 172.16.13.255 10101100.00010000.00001101 .11111111
HostMin: 172.16.13.1 10101100.00010000.00001101 .00000001
HostMax: 172.16.13.254 10101100.00010000.00001101 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.14.0/24 10101100.00010000.00001110 .00000000 (Class B)
Broadcast: 172.16.14.255 10101100.00010000.00001110 .11111111
HostMin: 172.16.14.1 10101100.00010000.00001110 .00000001
HostMax: 172.16.14.254 10101100.00010000.00001110 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.15.0/24 10101100.00010000.00001111 .00000000 (Class B)
Broadcast: 172.16.15.255 10101100.00010000.00001111 .11111111
HostMin: 172.16.15.1 10101100.00010000.00001111 .00000001
HostMax: 172.16.15.254 10101100.00010000.00001111 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.16.0/24 10101100.00010000.00010000 .00000000 (Class B)
Broadcast: 172.16.16.255 10101100.00010000.00010000 .11111111
HostMin: 172.16.16.1 10101100.00010000.00010000 .00000001
HostMax: 172.16.16.254 10101100.00010000.00010000 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.17.0/24 10101100.00010000.00010001 .00000000 (Class B)
Broadcast: 172.16.17.255 10101100.00010000.00010001 .11111111
HostMin: 172.16.17.1 10101100.00010000.00010001 .00000001
HostMax: 172.16.17.254 10101100.00010000.00010001 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.18.0/24 10101100.00010000.00010010 .00000000 (Class B)
Broadcast: 172.16.18.255 10101100.00010000.00010010 .11111111
HostMin: 172.16.18.1 10101100.00010000.00010010 .00000001
HostMax: 172.16.18.254 10101100.00010000.00010010 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.19.0/24 10101100.00010000.00010011 .00000000 (Class B)
Broadcast: 172.16.19.255 10101100.00010000.00010011 .11111111
HostMin: 172.16.19.1 10101100.00010000.00010011 .00000001
HostMax: 172.16.19.254 10101100.00010000.00010011 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.20.0/24 10101100.00010000.00010100 .00000000 (Class B)
Broadcast: 172.16.20.255 10101100.00010000.00010100 .11111111
HostMin: 172.16.20.1 10101100.00010000.00010100 .00000001
HostMax: 172.16.20.254 10101100.00010000.00010100 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.21.0/24 10101100.00010000.00010101 .00000000 (Class B)
Broadcast: 172.16.21.255 10101100.00010000.00010101 .11111111
HostMin: 172.16.21.1 10101100.00010000.00010101 .00000001
HostMax: 172.16.21.254 10101100.00010000.00010101 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.22.0/24 10101100.00010000.00010110 .00000000 (Class B)
Broadcast: 172.16.22.255 10101100.00010000.00010110 .11111111
HostMin: 172.16.22.1 10101100.00010000.00010110 .00000001
HostMax: 172.16.22.254 10101100.00010000.00010110 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.23.0/24 10101100.00010000.00010111 .00000000 (Class B)
Broadcast: 172.16.23.255 10101100.00010000.00010111 .11111111
HostMin: 172.16.23.1 10101100.00010000.00010111 .00000001
HostMax: 172.16.23.254 10101100.00010000.00010111 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.24.0/24 10101100.00010000.00011000 .00000000 (Class B)
Broadcast: 172.16.24.255 10101100.00010000.00011000 .11111111
HostMin: 172.16.24.1 10101100.00010000.00011000 .00000001
HostMax: 172.16.24.254 10101100.00010000.00011000 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.25.0/24 10101100.00010000.00011001 .00000000 (Class B)
Broadcast: 172.16.25.255 10101100.00010000.00011001 .11111111
HostMin: 172.16.25.1 10101100.00010000.00011001 .00000001
HostMax: 172.16.25.254 10101100.00010000.00011001 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.26.0/24 10101100.00010000.00011010 .00000000 (Class B)
Broadcast: 172.16.26.255 10101100.00010000.00011010 .11111111
HostMin: 172.16.26.1 10101100.00010000.00011010 .00000001
HostMax: 172.16.26.254 10101100.00010000.00011010 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.27.0/24 10101100.00010000.00011011 .00000000 (Class B)
Broadcast: 172.16.27.255 10101100.00010000.00011011 .11111111
HostMin: 172.16.27.1 10101100.00010000.00011011 .00000001
HostMax: 172.16.27.254 10101100.00010000.00011011 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.28.0/24 10101100.00010000.00011100 .00000000 (Class B)
Broadcast: 172.16.28.255 10101100.00010000.00011100 .11111111
HostMin: 172.16.28.1 10101100.00010000.00011100 .00000001
HostMax: 172.16.28.254 10101100.00010000.00011100 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.29.0/24 10101100.00010000.00011101 .00000000 (Class B)
Broadcast: 172.16.29.255 10101100.00010000.00011101 .11111111
HostMin: 172.16.29.1 10101100.00010000.00011101 .00000001
HostMax: 172.16.29.254 10101100.00010000.00011101 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.30.0/24 10101100.00010000.00011110 .00000000 (Class B)
Broadcast: 172.16.30.255 10101100.00010000.00011110 .11111111
HostMin: 172.16.30.1 10101100.00010000.00011110 .00000001
HostMax: 172.16.30.254 10101100.00010000.00011110 .11111110
Hosts/Net: 254 (Private Internet)

Network: 172.16.31.0/24 10101100.00010000.00011111 .00000000 (Class B)
Broadcast: 172.16.31.255 10101100.00010000.00011111 .11111111
HostMin: 172.16.31.1 10101100.00010000.00011111 .00000001
HostMax: 172.16.31.254 10101100.00010000.00011111 .11111110
Hosts/Net: 254 (Private Internet)

Subnets: 32
Hosts: 8128

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

Github
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
2000-2021 Krischan Jodies

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