Who called from 5147891990

I keep getting phone calls from this number. When I answer, all I hear is silence.

repeated phone calls from this number and nothing on the other end of the line. Kinda annoying.

has been calling non-stop. googled the number and found this. so the next time they called i picked up and didnt say anything, there was a woman on the other end who said hello, i hung up.

Why haven't you try to find out who it was?

Hi everyone
If you need information about this caller please call 1-800-636-3106 ext 104
We're a gouvernmental research firm and we've just change our calling. We're having a few problems with the dialer.