Hi All, I have just released network-address-0.1.0. This is the first version of the package. The network-address library provides data structures for IP addresses as well as subnetworks. The goal is to have a generic library for representing network addresses in binary or textual form. Currently it supports IPv4 and IPv6 (partially). *Data.Network.Address> readAddress "127.0.0.1" :: IPv4 IPv4 2130706433 *Data.Network.Address> let ip = readAddress "127.0.0.1" :: IPv4 *Data.Network.Address> showAddress ip "127.0.0.1" *Data.Network.Address> let subnet = readSubnet "192.168.1.42/8" :: IPSubnet IPv4 *Data.Network.Address> subnet IPSubnet (IPv4 3232235776) (-256) *Data.Network.Address> showSubnet subnet "192.168.1.0/8" *Data.Network.Address> showAddress . base $ subnet "192.168.1.0" *Data.Network.Address> (readAddress "192.168.1.5" :: IPv4) `member` subnet True *Data.Network.Address> (readAddress "192.168.2.5" :: IPv4) `member` subnet False I was looking for an IPv4/IPv6 data structure, and found a few libraries such as network-data, iproute, and nettle-openflow. These libraries are either written for a specific purpose or bring along dependencies. I decided to create network-address to consolidate the data structures and make a lightweight, fast, generic and complete library for representing these addresses. This is my first public Haskell library. The API is unstable and possibly not idiomatic. I'd appreciate any feedback. Hackage: http://hackage.haskell.org/package/network-address GitHub: https://github.com/sebnow/haskell-network-address Regards, Sebastian