This number keeps showing up on my husband Dan's cell phone.  Apparently he is not answering them it is usually a minute duration.

My husband used that number to call in on a conference call to Calfornia. Must be a phone provider.

This is a conference call number from freeconferencecall.com and I have been using it for more than one year for family to dial in. You need an access code to dial in and participate in the conference call.

I use this number for conference calls as well...