The ERP.net service is a hosted ERP service. Accessing the data is done through ERP instances.
When you sign up at erp.net, you can create and manage a new instance. It's a tenant in a hosting environment, allowing the management of multiple related legal entities (companies) in one instance.
You don't need to create separate instances per managed company.
Each instance has a unique name and can be accessed at https://<<instance_name>>.my.erp.net
For example, the demonstration database, DEMODB, is located at: