IP Range To CIDR

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CIDR

CIDR - IP Range To CIDR

Written by Administrator

Thursday, 14 June 2012 21:28

Page 2 of 6

IP Range To CIDR

What is the CIDR for XX.XX.XX.0 to XX.XX.XX.1 (A range of just two IP numbers)?

In binary, we know that this means the last bit can be either a 1 or a 0
Since the IP is made up from 32 binary bits, the answer is 32 bits less 31 bits equals one bit, so the answer is:
XX.XX.XX.0/31
where "/31" is called the IP prefix or network prefix.

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