is-subnet

Check if a string is an IP subnet in CIDR notation. Specifically, validating that the network address matches the given mask.

Install

npm i is-subnet

Usage

const isSubnet = require("is-subnet");

isSubnet("192.168.0.0/24"); //=> true
isSubnet("192.168.0.1/24"); //=> false
isSubnet("192.168.0.0"); //=> false
isSubnet("2001:db8::/64"); //=> true;
isSubnet("2001:db8::1/64"); //=> false;
isSubnet("2001:db8::"); //=> false;

API

isSubnet(input)

Check if input is an IP CIDR subnet. Returns either true or false.

Related

• is-cidr - Check if a string is an IP address in CIDR notation
• is-ip - Check if a string is an IP address

License

© stevehaskew, distributed under BSD licence

Based on previous work by Felipe Apostol and silverwind