valid-ip

Provides a small and reliable IPv4 and IPv6 validation library.

• Installation
• Documentation
• References
• License

Installation

npm i valid-ip

Documentation

Example

const { isV4, isV6 } = require('valid-ip')

isV4('175.21.195.5') // true

isV6('5b93:c18f:27e6:f322:530a:1a5d:74c8:e2c2') // true

How it works

The functions receives a string parameter and process the value to validate if it matches the following rules:

An IPv4 address has the format: x . x . x . x where x is called an octet and must be a decimal value between 0 and 255.

• No leading 0
• In range of (0 - 255)
• Has exactly 4 cells
• Has an integer in each cell

An IPv6 address has the format x : x : x : x : x : x : x : x, where x is called a segment and can be any hexadecimal value between 0 and FFFF.

• Can be composed to just one 0
• In hexadecimal range of (0000 - FFFF)
• Has exactly 8 cells
• No cells are empty

References

• https://www.youtube.com/watch?v=EB5FAwHqpm4
• https://www.ibm.com/docs/en/ts3500-tape-library?topic=functionality-ipv4-ipv6-address-formats
• https://stackoverflow.com/questions/5284147/validating-ipv4-addresses-with-regexp
• https://regex101.com/

License

MIT License