Who called from 7814780388

Same here. Several calls, received, no messages, hangs up like a robocaller when answer machine picks up. Caller ID says Roberts, Ryan.

Same call as above.  Hangs up without leaving a message. CID = Roberts, Ryan. Most likely a telemarketer who may be spoofing the CID.  When you call back, a message says: "The person you called is not available at this time. Leave a message."

Same thing,  caller is is Roberts,Ryan   No message. Being on a do not call does nothing nowadays.

Answered the telephone and they hung up.  I placed the number to be blocked through my telephone carrier.

Same as above. Ryan Roberts and no answer when you call back.