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IP Subnet Calculator

This page will calculate all valid subnets and ranges from an IP you give.

IP to Calculate from:

All subnets for 18.206.16.123 are:

  CIDR block     IP range (network - broadcast)     Subnet Mask     IP Quantity  
  18.206.16.123/32     18.206.16.123 - 18.206.16.123     255.255.255.255     1  
  18.206.16.122/31     18.206.16.122 - 18.206.16.123     255.255.255.254     2  
  18.206.16.120/30     18.206.16.120 - 18.206.16.123     255.255.255.252     4  
  18.206.16.120/29     18.206.16.120 - 18.206.16.127     255.255.255.248     8  
  18.206.16.112/28     18.206.16.112 - 18.206.16.127     255.255.255.240     16  
  18.206.16.96/27     18.206.16.96 - 18.206.16.127     255.255.255.224     32  
  18.206.16.64/26     18.206.16.64 - 18.206.16.127     255.255.255.192     64  
  18.206.16.0/25     18.206.16.0 - 18.206.16.127     255.255.255.128     128  
  18.206.16.0/24     18.206.16.0 - 18.206.16.255     255.255.255.0     256  
  18.206.16.0/23     18.206.16.0 - 18.206.17.255     255.255.254.0     512  
  18.206.16.0/22     18.206.16.0 - 18.206.19.255     255.255.252.0     1024  
  18.206.16.0/21     18.206.16.0 - 18.206.23.255     255.255.248.0     2048  
  18.206.16.0/20     18.206.16.0 - 18.206.31.255     255.255.240.0     4096  
  18.206.0.0/19     18.206.0.0 - 18.206.31.255     255.255.224.0     8192  
  18.206.0.0/18     18.206.0.0 - 18.206.63.255     255.255.192.0     16384  
  18.206.0.0/17     18.206.0.0 - 18.206.127.255     255.255.128.0     32768  
  18.206.0.0/16     18.206.0.0 - 18.206.255.255     255.255.0.0     65536  
  18.206.0.0/15     18.206.0.0 - 18.207.255.255     255.254.0.0     131072  
  18.204.0.0/14     18.204.0.0 - 18.207.255.255     255.252.0.0     262144  
  18.200.0.0/13     18.200.0.0 - 18.207.255.255     255.248.0.0     524288  
  18.192.0.0/12     18.192.0.0 - 18.207.255.255     255.240.0.0     1048576  
  18.192.0.0/11     18.192.0.0 - 18.223.255.255     255.224.0.0     2097152  
  18.192.0.0/10     18.192.0.0 - 18.255.255.255     255.192.0.0     4194304  
  18.128.0.0/9     18.128.0.0 - 18.255.255.255     255.128.0.0     8388608  
  18.0.0.0/8     18.0.0.0 - 18.255.255.255     255.0.0.0     16777216  
  18.0.0.0/7     18.0.0.0 - 19.255.255.255     254.0.0.0     33554432  
  16.0.0.0/6     16.0.0.0 - 19.255.255.255     252.0.0.0     67108864  
  16.0.0.0/5     16.0.0.0 - 23.255.255.255     248.0.0.0     134217728  
  16.0.0.0/4     16.0.0.0 - 31.255.255.255     240.0.0.0     268435456  
  0.0.0.0/3     0.0.0.0 - 31.255.255.255     224.0.0.0     536870912  
  0.0.0.0/2     0.0.0.0 - 63.255.255.255     192.0.0.0     1073741824  
  0.0.0.0/1     0.0.0.0 - 127.255.255.255     128.0.0.0     2147483648  

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