range_check
This is a simple module to validate IP address, check ip address version, check if ip is within a range.
netmask
Parse and lookup IP network blocks
ip-cidr
Module for working with CIDR (v4, v6)
neoip
IP address utilities for node.js, forked from `indutny/node-ip`.
ip-toolkit
A utility library for manipulating IPv4 and IPv6 address in Node.js.