Who called from 3135833303

Called 9:22 pm, twice.

When I answered there was no one on the line.  I was looking up the number online and while I was doing that, after about 1 minute, it just hung up.  Probably an automated robodialer

SELLING CREDIT CARD TRANSACTION SERVICE

Picked up a call from this number and got a burst of static that sounded like the inside of helicopter cabin.  I am also on the (useless) federal do-not-call list.

Offering to lower rates for accepting credit cards at my business.