Who called from 2132213511

It rang once and then went to Missed call. They called my cell phone number.

Rings once - and they hang up.  No message.   Just a scam.  Probably one of those numbers that if you call back you are charged money........  annoying.  A real business will always leave a message......

One ring, hang up, no message.

Calls in the evenings and in the mornings. I don't answer and they don't leave a message. Blocked.

Rings once, I don't answer numbers I don't know...called several days in a row