called T-mobile and spoke to them, apparently this number and 206-313-0023 are T-mobile routing numbers. They said that they are aware that this is a problem. It is when you get a text message from a phone number other than from a t- mobile phone the text message goes through a t-mobile routing number and then forwarded to you. So you do get the text message from someone but this number does not actually text you. The text number that you recieve shows their phone number on your phone but your bill shows the routing number. Hope this helps answer some questions. Next time check your text times that you get and then look at your bill and see if they are at the same time.