I just got a call from this number and the person was saying they were from "Domain Registration Support" and they wanted to verify my address for a domain I own.

The person had some sort of foreign accent, it sounded like it may have been African in nature. All of my domain info is registered through GoDaddy, so I found this to be suspect and basically told the person to get lost.

I got a call on my cell from this number.  They didn't leave a message and when I called back I got a fast busy signal.

Recived a call from 1-301-768-4784 and on the caller id the call was coming from INTL GATEWAY and all I heard was a faint voice and back ground noise.