The Galaxy S7 and S7 Edge firmwares are now available, and various new regions have also been covered. Check out the full firmware file names below to get the build no. and region code no. (last three letters).
Mainly, these firmwares belong to UK region, covering H3G, EE and O2 carriers, and Ireland. There is a firmware one each for New Zealand and Greece too.
Galaxy S7 firmware
Galaxy S7 Edge firmware
Download the firmware of your choice from the link above under download section. More firmwares will be added as and when available.