node package manager

ipop

IP subnet calculator

ipop

IP subnet calculator. One can also use it to check if IP is in subnet.

Install

npm install ipop

Usage

Example

var ipop = require('ipop');
 
// check if IP in subnet 
console.log(ipop.ip4incidr('192.168.1.15', '192.168.0.1/24'));
console.log(ipop.ip4incidr('192.168.1.15', '192.168.0.1/16'));
console.log(ipop.ip4incidr('192.168.1.15', '192.168.1.15/32'));
 
// show subnet info 
console.log(ipop.cidr4('87.239.88.1/22'));

Output:

false
true
true
{ net: '87.239.88.0',
  netmask: '255.255.252.0',
  broadcast: '87.239.91.255',
  low: '87.239.88.1',
  high: '87.239.91.254',
  hosts: 1022 }

Documentation

ip4incidr(ip, cidr)

check if ip is in given cidr. Returns boolean. cidr has to be in format X.X.X.X/X.

cidr4(cidr)

cidr4 returns object with info about given cidr:

  • net: network address
  • netmask: network mask
  • broadcast: broadcast address
  • low: first usable host address
  • high: last usable host address
  • hosts: number of usable hosts