A number of network routes may be configured on your dedicated or virtual servers aside from the default gateway. All those routes end up in the private network.
The list of networks in question includes but not limited to:
10.0.0.0/8 – private network between your servers (Global Private Network).
192.168.0.0/16 – the network used to access several internal services like DNS, NTP, and Unix/Linux distribution mirrors.
188.42.208.0/21 – the network used to access the Servers.com Cloud Storage.