Subnet Mask Reference Table


#1

Introduction


This document contains tables and examples of subnet masks, and what their various notations are. This is a handy guide for those who don’t know, or can’t be bothered to memorise them.

Currently this example page will only cover IPv4, but will expand later to cover IPv6, as WACAN uses both.

IPv4


Full table

/25 to /30 breakdown

/25
*Two subnets
*126 hosts per subnet

/26
*4 Subnets
*62 Hosts per Subnet

/27
*8 Subnets
*30 Hosts per Subnet

/28
*16 Subnets
*14 Hosts per Subnet

/29
*32 Subnets
*6 Hosts per Subnet

/30
*64 Subnets
*2 Hosts per Subnet

A copy of the file that was used to generate these images, can be found here