How would yoy know someone blocked your number?

I have a regular phone and the person I texted has an IPhone. When I tried sending a text it said " The recipient that you are sending to has chosen not to receive messages. " What does that mean?
My friend who also has an IPhone texted his number and he replied, but it had IMessage under it.

The person might have some sort of caller id blocker or something

  • Someone called me on blocked number? I have an iPhone 4s it came up "blocked" as where the name usually is then underneath it said unknown What does this mean? Does it mean the person blocked my number? I never blocked anyone
  • If someone were to block my text now number would it block my normal number? I was teasing my girlfriend on my text now and she blocked me and I tired calling her and texting her on my normal number but she won't reply and it only run once and hung up. She has an iPhone, would it block my normal number if she blocked my text now number?
  • How would you know if someone has blocked you? I'm not on speaking terms with this person at the moment. Without calling, is there a way to know if he's blocked me? I have an iPhone and he has a Samsung. So when I text him, even if he gets it, it never says "delivered"
  • How to tell if someone blocked your number? Lets say someone has AT&T and they blocked your number as far as you sending them texts and calls goes, would you get a message saying they blocked you and would you get a message saying they blocked you if you tried calling them? The person that I'm wondering this about has an iPhone but I'm not sure which version.