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  • License MIT

Check if an IPv4 or IPv6 address is contained in the given CIDR subnet

Package Exports

  • is-in-subnet

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (is-in-subnet) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

is-in-subnet npm dependencies license node

Check if an IPv4 or IPv6 address is contained in the given CIDR subnet.

  • Small
  • Fast
  • Simple syntax
  • Full test coverage
  • TypeScript-friendly
  • Zero dependencies

Installation

npm i is-in-subnet

Usage

const { isInSubnet } = require('is-in-subnet');

console.log( isInSubnet('10.5.0.1', '10.4.5.0/16') );   // false
console.log( isInSubnet('10.5.0.1', '10.4.5.0/15') );   // true

console.log( isInSubnet('2001:db8:f53a::1', '2001:db8:f53b::1:1/48') );   // false
console.log( isInSubnet('2001:db8:f53a::1', '2001:db8:f531::1:1/44') );   // true