same as the other comments as far as what caller ID displays: Intl. number and a local number (435-868-3020 in my case).
First call was a woman (didn't recognize the accent) asking for a person who works here by name. He said that it was a free subscription to a professional magazine.
Another call a couple of hours later was a recordering for credit something with instructions to press "2" to be removed from their list.

Called my phone company to find out what was up, but they were no help.

these people are located in chennai,india.Despite telling them not to call,they bug our brains constantly,so that we should use their long distance phone company.These rascals job is to call and harass us only.This is what happens when technology is wrongly used,to harass people,in the name of soliciting business.I have even yelled at them using abusive tamil language,but these thick skinnes [***] have no brains and continue to harass me from Chennai,India.

Int'l number was on my caller I.D., but area code was 313.

the same thing goes on here at my house. this number calls all day. when i call it its not in service. got to get rid of this.

i have recived a phone call early in the morning and i don't know who it is. the phone number is +13472729282