There are several ways to tell if someone has blocked you, which may vary depending on the platform (social media, phone calls, messaging apps):

1. On social media (like Instagram):
   • You can't find their profile by searching, and trying to visit their profile shows a message like "User not found" or "Sorry, this page isn't available."
   • Posts and stories of the person are no longer visible to you.
   • In direct messages, previous conversations with that person may disappear.
   • Likes and comments from them on mutual friends' posts may no longer be visible to you.
   • Changes like their follower/following counts dropping or their profile picture and bio changes may indicate blocking.
2. On phone:
   • Your calls to their number go straight to voicemail after one ring or no rings at all.
   • Your text messages do not get delivered or show a "Not Delivered" status.
   • Calls from another phone number get through, but yours doesn't.
   • You can try calling while hiding your number (dial *67 before the number) to test if the behavior changes.
3. On messaging apps like WhatsApp:
   • You no longer see their profile picture or status updates.
   • Messages you send show only one checkmark (message sent) but never two (message delivered).
   • You cannot add them to a new group chat.
   • Calls on the app to them don't ring.

It is important to consider other reasons for these signs, such as deactivated accounts, changed privacy settings, or connectivity issues, so these methods are indicators rather than definitive proof of being blocked.