Why is grafana-server.exe connecting to public IP addresses?

I have Grafana installed on a Windows 2008r2 server on a private network. The only data source is a database on the same server. Grafana is only accessed from hosts on the private network, and no ports on the server are open to the Internet or forwarded.

I’m seeing grafana-server.exe connecting to the Internet, to sites such as ****.bc.googleusercontent.com, and to an IP address (whois says that is “SKYCA-3”)

Why is Grafana making those connections?

I can’t answer the why but I don’t like it “reaching out” either so I blocked it from leaving the building with a firewall rule.