What is a tech-c and what is an admin-c?
"admin-c" (administrative contact) and "tech-c" (technical contact) are network contacts, required to be listed by their nic-handles in certain RIPE Database objects. This is done for operational correspondence such as Network troubleshooting. The admin-c must be physically located at the site of the network. The tech-c does not need to be physically located at the site of the network. You can have multiple admin-c, tech-c and zone-c attributes in an object, each of them referencing different person or role objects.