koa-ip
Ip filter middleware for koa, support `whitelist` and `blacklist`.
ip-filter
Validates given IPs (IPv4 and IPv6) using [micromatch][] - glob patterns, RegExp, string or array of globs. If match returns the IP, otherwise null.
koa-ip-geo
IP and GeoLocation filter middleware for koa, support allow lists and block lists.
ipaddr.js
A library for manipulating IPv4 and IPv6 addresses in JavaScript.