ipop

IP subnet calculator

ipop

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

npm install ipop
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 }

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

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