CIDR to IPv4 converter

Handy converter:

E.g. for the CIDR to IP Range using a CIDR Range of

means 64 IP addresses – the first being 0 and the last 33.


You can calculate this simply by adding up how many you need to get to 32 – i.e. 6.

Then 2^6 = 64.

So, the first would be and the last would be