Who called from 3129577926

My co-worker and I keep getting hang up calls from this number where all we hear is breathing on the other end. Very creepy and no one has ever identified themself.

Ohh thats sound scary! It might be a stalker?? try to get id caller?

I got a call from this number today, too.  Caller ID says:  INTL GATEWAY ... no heavy breathing.  It's a telemarketing call.

NEED to get off this list ....three calls today alone ....