Service Provider Security Contacts (SCs) are a special purpose security contact. As a service provider, they don't have registered network assets, but they are flagged within NetReg as providing support for another SC. For example, the Service Provider SC might register devices for the Client SC. Service Provider SCs have "device-based" privileges with the Client SC; they can create, edit and delete devices from the Client SC.
Service Provider SCs can be grouped or departmental. Notifications about security events (compromises, vulnerabilities, etc.) will go to members of both Service Provider and Client SCs.