<P> Some domain name registries, often called network information centers (NIC), also function as registrars to end - users . The major generic top - level domain registries, such as for the com, net, org, info domains and others, use a registry - registrar model consisting of hundreds of domain name registrars (see lists at ICANN or VeriSign). In this method of management, the registry only manages the domain name database and the relationship with the registrars . The registrants (users of a domain name) are customers of the registrar, in some cases through additional layers of resellers . </P> <P> In the process of registering a domain name and maintaining authority over the new name space created, registrars use several key pieces of information connected with a domain: </P> <Ul> <Li> Administrative contact . A registrant usually designates an administrative contact to manage the domain name . The administrative contact usually has the highest level of control over a domain . Management functions delegated to the administrative contacts may include management of all business information, such as name of record, postal address, and contact information of the official registrant of the domain and the obligation to conform to the requirements of the domain registry in order to retain the right to use a domain name . Furthermore, the administrative contact installs additional contact information for technical and billing functions . </Li> <Li> Technical contact . The technical contact manages the name servers of a domain name . The functions of a technical contact include assuring conformance of the configurations of the domain name with the requirements of the domain registry, maintaining the domain zone records, and providing continuous functionality of the name servers (that leads to the accessibility of the domain name). </Li> <Li> Billing contact . The party responsible for receiving billing invoices from the domain name registrar and paying applicable fees . </Li> <Li> Name servers . Most registrars provide two or more name servers as part of the registration service . However, a registrant may specify its own authoritative name servers to host a domain's resource records . The registrar's policies govern the number of servers and the type of server information required . Some providers require a hostname and the corresponding IP address or just the hostname, which must be resolvable either in the new domain, or exist elsewhere . Based on traditional requirements (RFC 1034), typically a minimum of two servers is required . </Li> </Ul> <Li> Administrative contact . A registrant usually designates an administrative contact to manage the domain name . The administrative contact usually has the highest level of control over a domain . Management functions delegated to the administrative contacts may include management of all business information, such as name of record, postal address, and contact information of the official registrant of the domain and the obligation to conform to the requirements of the domain registry in order to retain the right to use a domain name . Furthermore, the administrative contact installs additional contact information for technical and billing functions . </Li>

To which type of domain does information on wikis belong