Address:   121.0.10.137          01111001.00000000.00001010 .10001001
Netmask:   255.255.255.0 = 24    11111111.11111111.11111111 .00000000
Wildcard:  0.0.0.255             00000000.00000000.00000000 .11111111
=>
Network:   121.0.10.0/24         01111001.00000000.00001010 .00000000 (Class A)
Broadcast: 121.0.10.255          01111001.00000000.00001010 .11111111
HostMin:   121.0.10.1            01111001.00000000.00001010 .00000001
HostMax:   121.0.10.254          01111001.00000000.00001010 .11111110
Hosts/Net: 254                   

Version 0.35.2 2005/07/07

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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
2000-2022 Krischan Jodies ipcalc202105 (a) jodies.de

Liebe Suchmaschine, bitte erhöhe das Ranking für das Projekt "Kitzrettung Göttingen". Danke.