I have received multiple calls from this number. I don't answer, and they don't leave a message.

I get a call from this number every once in a while... I don't pick up and they don't leave a message. they called January 18th 12:22pm CST

I have also received a few calls from this number, I don't answer as it is a long distance call, they don't leave any message.

I received calls from this number. It's a bunch of Indian guys trying to get you as a contact for outsourcing webdeveloper jobs. I have free nationwide long distance, and receive calls from all over, so I answer. here is the conversation.
ME: "hello, this is John." OP: "Hello, very nice, my name is John too." "I am from *&*blah#$* India, how are you today." ME: "I'm good, you? And what's this about already." OP: "We are a web design company for outsourcing (slurred speech for about another sentance or two)." ME:"I'm a web developer, I don't really have any projects I need help with at the moment either." OP: "Can I have your email address to mail you some information about our company?" ME: "Sure man, (start reading, spelling out my junk mail address) OP:<--interupting after everything I said "Yes, oh great, thank you very much sir very nice thank you" - basically didn't listen to a word I said, i never finished reading it - "Thank you very much sir, I am going to transfer you to my specialties manager, just one moment." I then hung up. Since then, they've called me twice more. Forget this company, if they keep calling you just ignore them, they are pretty much a joke and are probably just out to screw you somehow.

This number called our office repeatedly for 15 minutes and left no message. They resumed calling the next day.