Caller ID says "EASTER SEALS". I picked up, but I said nothing (not even "hello"). They said nothing either and quickly hung up. I did not call them back.
I googled the number but discovered little. The number seemed to be more active back in September '16.
Recently, I started receiving snail mail from Easter Seals. I am unsure if this is related to the call. I have also been receiving calls with the same caller ID from 301 298 1369.