Who called from 6784213000

they called me and hung up

called and just sat there, no response, I slammed the phone down on them. losers

http://www.primedia.com/

they called...I missed it, but they left no voice mail.

Received four calls from (678) 421-3000-they just stay on line do not say anything or
hang up,I hung up,I will block this number from my in coming call list.

Very annoying.