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ip-cidr

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ip-cidr

Module for working with CIDR (v4, v6)

  • 4.0.2
  • latest
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  • npm
  • Socket score

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What is ip-cidr?

The ip-cidr npm package provides utilities for working with IP addresses and CIDR (Classless Inter-Domain Routing) notations. It allows you to perform various operations such as checking if an IP address is within a CIDR range, converting CIDR notations to IP ranges, and more.

What are ip-cidr's main functionalities?

Check if an IP is within a CIDR range

This feature allows you to check if a given IP address is within a specified CIDR range. In this example, '192.168.1.5' is checked against the CIDR range '192.168.1.0/24'.

const IPCIDR = require('ip-cidr');
const cidr = new IPCIDR('192.168.1.0/24');
const isInRange = cidr.contains('192.168.1.5');
console.log(isInRange); // true

Convert CIDR to IP range

This feature converts a CIDR notation to its corresponding IP range. In this example, '192.168.1.0/24' is converted to the range ['192.168.1.0', '192.168.1.255'].

const IPCIDR = require('ip-cidr');
const cidr = new IPCIDR('192.168.1.0/24');
const range = cidr.toRange();
console.log(range); // ['192.168.1.0', '192.168.1.255']

Get the first and last IP addresses in a CIDR range

This feature retrieves the first and last IP addresses within a given CIDR range. In this example, '192.168.1.0/24' is used to get the first and last IP addresses.

const IPCIDR = require('ip-cidr');
const cidr = new IPCIDR('192.168.1.0/24');
const firstIp = cidr.start({ type: 'addressObject' });
const lastIp = cidr.end({ type: 'addressObject' });
console.log(firstIp); // { address: '192.168.1.0', subnetMask: 24 }
console.log(lastIp); // { address: '192.168.1.255', subnetMask: 24 }

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Package last updated on 28 Jul 2024

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