Placed phone calls

I have Xfinity land line phone. I was online to look at my call history to look up a phone number that I recently called. While I was there, I found that there are a lot of placed calls from my number that I didn't make.

This one number, over and over, I went back as far as Dec 8 and stopped so I'm not sure how far back it's been happening. 

It shows in my call history as '[Edited: "Personal Information"] • WASHINGTON, DC USA - Placed'.