ip-address

A JavaScript/TypeScript library for parsing, validating, and manipulating IPv4 and IPv6 addresses. Current stable version is 10.1.0, released with breaking changes from v9 (native BigInt support). Works in Node.js (>=12) and browsers via bundlers. Key differentiators: built-in Teredo inspection, subnet calculations, special property detection, and ~1,600 test cases. Ships TypeScript definitions.