Those are short codes to different companies. You will receive them when you 'subscribe' to their messages.
Some you simply text their code you see some where and you are subscribed. Others you may sign up for and not even know it. Usually through an ad you clicked on or maybe a 'free' download.
I wasn't Totally for sure on what the OP posted was and Google search didn't help much either B.O. or i would of Posted to try and Help! Thank ya for the info on this End O and have a Great Morning & Afternoon Sir.. b