.de is the country code top-level domain for the Federal Republic of Germany.
Rules for registration
In order to register a .DE domain name, either the Registrant (Owner) or the Administrative Contact must be based in Germany with a verifiable German address.
In order to activate a .DE domain, you must provide at least two functional nameservers; however, you may provide up to five nameservers per domain. Additionally, the two required nameservers must be active on two different subnets and must be authoritative for the domain name at the time of registration.