I managed to cram 45 IP addresses into a single UDP DNS response for the MXes for AOL.com many years ago. However, that trick also ended up breaking all intern

I managed to cram 45 IP addresses into a single UDP DNS response for the MXes for AOL.com many years ago. However, that trick also ended up breaking all internet e-mail around the world -- see https://www.theregister.com/2018/04/16/who_me/ https://www.theregister.com/2018/04/16/who_me/