Hello Dale,
I recommend testing from more than one source other than whatismydns.com, I performed a lookup on the IP you provided and received the following.
Hostname: r2.compute.atl1.edc.strln.net
ISP: Cisco OpenDNS LLC
Services: Datacenter
Country: United States
State/Region: Georgia
City: Atlanta
My only question is, where are you configuring your DNS settings? If you configured them on your local machine, then in turn, whatever network you are connecting your computer to will use OpenDNS, whether it is your home network or hotspot.