Who called from 2818936100

called my cell on 08/11/10 one short signal and no message left.

Called my cellphone at about 9:50 AM 8/14/10 - three short beeps then nothing.

my number register with Do Not Call registery. I still recieve prank call.  a  call from 281-893-6100 to my call phone but did not leave message. when return a call . a automatic voice respond " UNITED STATE PRECRIPTION CARD " .  I have recieve this types of a call before servial mounth ago.

Called my mobile phone on 9/30/10, but didn't leave a message.

Just received a call from this number on 10/7/2010 at 15:30. It only rang 3 times before I am guessing they hung up. Funny, I googled the number and got this site, rock on!