I too have been getting calls from this number... about 5 a week... If I answer, no one talks. If I don't answer, I get a hang up on the machine.
Very annoying.
Received a call from this number and was curious. so i Googled it to see and here we are. I am on a do not call list also.....I don't have any subscriptions. Beware....Beware....thanks for this site. D
Northup Grumman is a military/mercenary corporation, if you went to their site, they record your IP address, trace it, and then call you up. I got the same phone call from them.