About Reserved Names
All registry operators are required by their Registry Agreement to exclude certain domain names from registration in a Top Level Domain (TLD). These reserved names include strings that are for Country Code Top Level Domains (ccTLDs), ICANN-related names (such as ICANN), IANA-related names (such as example), and names that the registry operator can use in connection with the operation of the TLD.
A list of reserved names for each TLD is in its Registry Agreement, and may vary depending on the TLD. For some TLDs, their registry operators may withhold from registration at all levels domain names that are not activated in the DNS and release them for registration to another person or entity at the registry operator’s discretion. To determine which registry agreement applies to a TLD, please see ICANN’s webpage with all current registry agreements.
If you have a complaint about reserved names or a blocked SLD, please submit a Reserved and Blocked Second Level Domain (SLD) Names Complaint Form.