I received a missed call from 901-203-1007 blocked the number, to day I just received another miss call from 904-203-1007 apparently blocking the number doesn't help.....well I switched to Comcast November of last year and when I did have Directv they never called??? Why call now?
If you are an AT&T customer they are now allowed to call you since they are they same company. Your AT&T contract allows them to market to you. You can't win unless you leave AT&T.
Not a good idea posting your phone number on a public forum. Ref' to Admin for deletion.
Also...you are the only one who can stop them - Do not answer unknown calls and do not call them back. Consider getting a call blocking device (or app for your cell phone)-they're available online and start around $50 or so. http://800notes.com/nb/search?q=call+blockers
Also take a look at: http://www.wikihow.com/Block-a-Call