didn't answer

this number calls monthly representing themselves and ATT Yellow Pages........
a person with a very thick Indian or Pakistani accent identifies as jerry.........

how can we bar them from our phones?

Man calls saying he's from our Local Free Listing Yellow Pages and tries to verify business info. and then tries to send you over to his manager for confirmation....when  I said "you're not going to bill me monthly or anything are you?" he said he would mail me the info. and then said he'd put me on hold a minute and then disconnected me.   I tried to call back, and the number said no longer in service.  Caller ID showed "Akron,Ohio" BEWARE SCAM