sipcalc で CIDR 計算を行う

% sipcalc 172.20.136.96/27
-[ipv4 : 172.20.136.96/27] - 0

[CIDR]
Host address		- 172.20.136.96
Host address (decimal)	- 2887026784
Host address (hex)	- AC148860
Network address		- 172.20.136.96
Network mask		- 255.255.255.224
Network mask (bits)	- 27
Network mask (hex)	- FFFFFFE0
Broadcast address	- 172.20.136.127
Cisco wildcard		- 0.0.0.31
Addresses in network	- 32
Network range		- 172.20.136.96 - 172.20.136.127
Usable range		- 172.20.136.97 - 172.20.136.126

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% sipcalc --version
sipcalc 1.1.6
Written by Simon Ekstrand.

Copyright (C) 2003-2013 Simon Ekstrand.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.