I got the same call. I didn't answer. I thought they might be associated with numbers such as 757-296-0105, 202-688-0552, 919-648-4931,612-424-5636 the list goes on. If they are connected it is by a company called CKS from Norfolk, Virginia.
Multiple messages received and "sent" to my boyfriend's phone from 111-047-0400 on October 1. Cingular (AT&T) says the prefix 111 is typically messages from Cingular. My boyfriend has no idea what I am talking about, he has never seen that number before on his phone, but it appears at least 20 times on October 1.
A very reliable online site like USpopularnames.com will let you experience visiting a dependable web-based community. In case you need verify a call using a reverse lookup directory, this website lets you complete the process. Likewise, you can post your comment and let other people read it.