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[](https://dl.circleci.com/status-badge/redirect/circleci/9fJmTZfn8d8p7GtVt688PY/JjriGjhcxBD6zYKygMZaet/tree/master) [![codecov]](https://codecov.io/github/beaugunderson/ip-address?branch=master) [![downloads]](https://www.npmjs.com/package/ip-address) [![npm]](https://www.npmjs.com/package/ip-address) [![snyk]](https://snyk.io/test/github/beaugunderson/ip-address) [codecov]: https://codecov.io/github/beaugunderson/ip-address/coverage.svg?branch=master [downloads]: https://img.shields.io/npm/dm/ip-address.svg [npm]: https://img.shields.io/npm/v/ip-address.svg [snyk]: https://snyk.io/test/github/beaugunderson/ip-address/badge.svg ## ip-address `ip-address` is a library for validating and manipulating IPv4 and IPv6 addresses in JavaScript. ### Upgrading from 9.x to 10.x The dependency on `jsbn` was removed thanks to [michal-kocarek](https://github.com/michal-kocarek). Thanks Michal! For clarity, all methods with BigInteger in the name were renamed to BigInt. #### Breaking changes - `#fromBigInteger()` → `#fromBigInt()`; now returns a native BigInt - `#bigInteger()` → `#bigInt()`; now returns a native BigInt ### Documentation Documentation is available at [ip-address.js.org](http://ip-address.js.org/). ### Examples ```js var Address6 = require('ip-address').Address6; var address = new Address6('2001:0:ce49:7601:e866:efff:62c3:fffe'); var teredo = address.inspectTeredo(); teredo.client4; // '157.60.0.1' ``` ### Features - Usable via CommonJS or ESM - Parsing of all IPv6 notations - Parsing of IPv6 addresses and ports from URLs with `Address6.fromURL(url)` - Validity checking - Decoding of the [Teredo information](http://en.wikipedia.org/wiki/Teredo_tunneling#IPv6_addressing) in an address - Whether one address is a valid subnet of another - What special properties a given address has (multicast prefix, unique local address prefix, etc.) - Number of subnets of a certain size in a given address - Display methods - Hex, binary, and decimal - Canonical form - Correct form - IPv4-compatible (i.e. `::ffff:192.168.0.1`) - Works in [node](http://nodejs.org/) and the browser (with browserify) - ~1,600 test cases ### Used by - [anon](https://github.com/edsu/anon) which powers [@congressedits](https://twitter.com/congressedits), among [many others](https://github.com/edsu/anon#community) - [base85](https://github.com/noseglid/base85): base85 encoding/decoding - [contrail-web-core](https://github.com/Juniper/contrail-web-core): part of Contrail, a network virtualization solution made by Juniper Networks - [dhcpjs](https://github.com/apaprocki/node-dhcpjs): a DHCP client and server - [epochtalk](https://github.com/epochtalk/epochtalk): next generation forum software - [geoip-web](https://github.com/tfrce/node-geoip-web): a server for quickly geolocating IP addresses - [hexabus](https://github.com/mysmartgrid/hexabus): an IPv6-based home automation bus - [hubot-deploy](https://github.com/atmos/hubot-deploy): GitHub Flow via hubot - [heroku-portscanner](https://github.com/robison/heroku-portscanner): nmap hosted on Heroku - [ipfs-swarm](https://github.com/diasdavid/node-ipfs-swarm): a swarm implementation based on IPFS - [javascript-x-server](https://github.com/GothAck/javascript-x-server): an X server written in JavaScript - [libnmap](https://github.com/jas-/node-libnmap): a node API for nmap - [mail-io](https://github.com/mofux/mail-io): a lightweight SMTP server - [maxmind-db-reader](https://github.com/PaddeK/node-maxmind-db): a library for reading MaxMind database files - [proxy-protocol-v2](https://github.com/ably/proxy-protocol-v2): a proxy protocol encoder/decoder built by [Ably](https://www.ably.io/) - [Samsara](https://github.com/mariusGundersen/Samsara): a Docker web interface - [sis-api](https://github.com/sis-cmdb/sis-api): a configuration management database API - [socks5-client](https://github.com/mattcg/socks5-client): a SOCKS v5 client - [socksified](https://github.com/vially/node-socksified): a SOCKS v5 client - [socksv5](https://github.com/mscdex/socksv5): a SOCKS v5 server/client - [ssdapi](https://github.com/rsolomou/ssdapi): an API created by the University of Portsmouth - [SwitchyOmega](https://github.com/FelisCatus/SwitchyOmega): a [Chrome extension](https://chrome.google.com/webstore/detail/padekgcemlokbadohgkifijomclgjgif) for switching between multiple proxies with ~311k users! - [swiz](https://github.com/racker/node-swiz): a serialization framework built and used by [Rackspace](http://www.rackspace.com/)