I work for Perot Systems in Plano, TX. When I got to work today, I noticed that my desk phone had gotten several calls yesterday from this phone number and even once this morning before I got to work. I did a google search and found these comments about this number.
So I called the 214-352-1123
nbr that Pattie had already listed and, sure enough, a fellow answered the Phone with "Circulation III, can I help you?". I asked if the 214-580-1098
phone number belonged to them and the fellow confirmed that it was indeed theirs. I asked that my work phone number please be removed from their calling list and after taking my number he said that it would be removed. I told him that all the 972-577-xxxx phone numbers belonged to Perot Systems and suggested that it would probably be a waste of their time to call any of them and that he might want to go ahead and just remove all of the 577 exchange phone numbers from their database.
I hope this information is of some help to those who follow.