Is it possible to block someone sort of accidently? (I am not smartphone proficient so I don't actually know.) I mean, I've accidently deleted people. I've called the wrong people. I've texted the wrong people. etc., etc. Usually happens because I'm not paying close attention and I hit the wrong button. I usually notice it when I do it, but not always. I guess what I'm saying, is there a possibility he didn't purposely block you? If you have an email address or other way to contact him, you might just lightheartedly contact him and say, "Hey, do you realize you blocked my number? Hope I didn't do something to upset you" and wait for a response.