Old Call History

I need to find a phone number from my recent calls list. Unfortunately, the date is from June and my call history goes back to early July. Is there any way to find the call history from the previous month?

Also, I looked at my phone bill and did not see the received call for that date. I'm thinking that this may be because the person called my Google Voice number. I checked Google Voice and couldn't find it there either. Believe me, I know when the call was received! lol My last chance is the iphone call history, but I would somehow need to see if I can pull it up.

Thanks!