cidr-block-check 
NPM module that checks if a given IP address is part of a given CIDR block.
Details about CIDR can be found here.
Installation
npm i cidr-block-checkUsage
import cidrBlockCheck from 'cidr-block-check';
const cidr = '192.168.1.17/22';
const ip = '192.168.2.10';
console.log(cidrBlockCheck.v4.isInBlock(cidr,ip));
// true