Who called from 5135565287

No one spoke, hung up on. They have called 3 times. When attempting to call back its a voicemail line and you must have the extension

I've had a recent injury and I hurried to the phone only to be hung up on. When I called the number you have to have mailbox number or name. DON'T CALL ME AGAIN!

I've been getting called by the same exchange 556 but with different ending numbers. This time it was 5287. No voice mail was left each time and each number is not one that I recognize. I'm guessing it is a prank of some kind.

Probably some politician. I didn't answer.

It is UC asking to do a survey