How do you know when your blocked on iphone

“The last message that you know was received and responded to…should have a 'delivered' status,” Lavelle explains. If, under the messages you've sent after that, you don't see that “delivered” notification, that could mean that person has blocked you.

Here's a great tip for how to tell if you're blocked on iMessage: Look underneath the last text you sent before you suspect you were blocked. If the previous iMessage says "Delivered" under the message bubble but the most recent one doesn't, it can mean that you've been blocked.