This directory, dists, is the canonical way to access the distributions.
Each distribution can be accessed by name or state from here.

oldoldstable, or stretch       - the released Debian 9.13
oldstable, or buster           - the released Debian 10.13
stable, or bullseye            - the released Debian 11.6
oldoldstable-proposed-updates  - possible updates to Debian 9
oldstable-proposed-updates     - possible updates to Debian 10
proposed-updates               - possible updates to Debian 11
stretch-updates                - important updates to Debian 9
buster-updates                 - important updates to Debian 10
bullseye-updates               - important updates to Debian 11
testing, or bookworm           - the development version of the next release
unstable, or sid               - untested candidate packages for future releases
experimental, or rc-buggy      - experimental packages to be used on top of unstable