Does anyone knows who is using this number?

left no message...

I called the number back...it says it is Washington Mutual Card services. It is for registering a new credit card (you know the little sticker you peel off of your credit card and call the number on before you can use the credit card). I recently activated a new credit card with them...perhaps they got my phone number that way. I also got a phone call from 925-738-0256..same thing.

this number is constantly on my caller id, i have an unlisted telephone number, i have also re-registered my number on the do not call list. this number calls on sunday evevings, saturday afternoons, and weekday evenings, these calls started about a week ago, a message is never left.  how do i get these calls to stop

These pains in the a..... call early, late, weekdays, weekends. It is impossible. Even when I have answered the phone there is never anyone on the other end.