* [bart v0.30.0](https://github.com/gaissmai/bart) – Balanced routing-table implementation adapting Knuth's ART for significantly lower memory and faster IP-to-CIDR lookups.

* [CIDR v0.4.0](https://github.com/3th1nk/cidr) – Go-based CIDR library for parsing, iterating, sorting, splitting, merging, and checking IPv4/IPv6 segments, with range, subnet relation, and host/mask math helpers.

* [cidr-tools 13.0.2](https://github.com/silverwind/cidr-tools) – Utilities for manipulating and analyzing IPv4 and IPv6 CIDR networks.