Who called from 7248366200

I continue to get calls from 724-836-6200 but they refuse to leave a message.  Who does this and better yet, how can I block them from my cell phone?

same as tim.  gotten called about 5 times now and no message...

found out that it's MyContractor.com.  i signed up for an estimate with them about 10 months ago.  told them that i'm not interested and they proceeded to call me about 3-4 times every month.  since it's an unknown number for me (i had their 1-888 number stored) i never answered it.  [***]...  finally got a hold of someone and told them off and had them remove my number...

ps: they called me four times just today!!!  what the hell!??!?!!

They call me several times a day and had an attitude when I asked to be removed. I recommend reporting them to the better business bureau.