CIDR and subnet calculator

IP to CIDR - simple

Input lower and upper IP (either IPv4 or IPv6) of the range - the tool will calculate best matching CIDR range. Subnet will be included in result.



IP to CIDR - advanced

Input at least two IP's (IPv4 and/or IPv6), domainnames or CIDR ranges to include - the tool will calculate best matching CIDR ranges. Subnet will be included in result. Seperate by space, tab, newline or comma.


IPv4 max network prefix:

IPv6 max network prefix:

Reverse - CIDR to IP + subnet

Input one or more CIDR ranges to get info of IP addresses and subnet.


CIDR to IP result

223.195.110.0/25


CIDR
223.195.110.0/25


lower IP
223.195.110.0


upper IP
223.195.110.127


subnet
255.255.255.128


broadcast
223.195.110.127


count
128



byte no: 1 2 3 4
bit no:

 1-8

 9-16

 17-24

 25-32
value: 223 195 110 0
bit pattern:
1
1
0
1
1
1
1
1
1
1
0
0
0
0
1
1
0
1
1
0
1
1
1
0
0
0
0
0
0
0
0
0
prefix:
/25
 

Log

  • Parseing '223.195.110.0/25' into 128 IP's
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