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Your IP Address: 54.224.76.106

Subnet Mask Inverter

Enter the dotted decimal Subnet Mask: ...
Inverted Subnet Mask: ...

Inverting Subnet Mask Tutorial

With this tool, we can make inversion of dotted decimal subnet mask. It is easy to invert subnet mask. For example we want to invert subnet mask: 255.255.255.0. First we need to convert it into binary format:
        255.255.255.0 = 11111111.11111111.1111111.0000000
    
From above binary, then we create the inversion. First, we change 1 to 0 and 0 to 1. So we get:
        binary inversion = 00000000.00000000.0000000.1111111
    
We can convert above binary into decimal dotted IP Address: 0.0.0.255

Subnet Cheat Sheet

  Netmask Inverse mask # of Class C subnets # of IPs # of Hosts
/32 255.255.255.255 0.0.0.0   1 1
/30 255.255.255.252 0.0.0.3 64 4 2
/29 255.255.255.248 0.0.0.7 32 8 6
/28 255.255.255.240 0.0.0.15 16 16 14
/27 255.255.255.224 0.0.0.31 8 32 30
/26 255.255.255.192 0.0.0.63 4 64 62
/25 255.255.255.128 0.0.0.127 2 128 126
/24 255.255.255.0 0.0.0.255   256 254
/23 255.255.254.0 0.0.1.255 128 (2 Class C) 512 510
/22 255.255.252.0 0.0.3.255 64 (4 Class C) 1024 1022
/21 255.255.248.0 0.0.7.255 32 (8 Class C) 2048 2046
/20 255.255.240.0 0.0.15.255 16 (16 Class C) 4096 4094
/19 255.255.224.0 0.0.31.255 8 (32 Class C) 8192 8190
/18 255.255.192.0 0.0.63.255 4 (64 Class C) 16384 16382
/17 255.255.128.0 0.0.127.255 2 (128 Class C) 32768 32766
/16 255.255.0.0 0.0.255.255 (256 Class C) 65536 65534
/8 255.0.0.0 0.255.255.255   16777216 16777214