Comprehensive list of domain names that cannot be registered due to ICANN policies, trademark protection, and regulatory requirements
Unregistry maintains a comprehensive list of reserved domain names that cannot be registered across our TLD extensions (.com.store, .onl family, and .u Web3 domains). These restrictions are based on:
Domain names are reserved to prevent confusion, protect intellectual property rights, comply with international treaties and regulations, and maintain the stability and security of the internet infrastructure.
Attempting to register a reserved domain name will result in automatic rejection. This list is regularly updated to reflect new reservations and trademark registrations.
These terms are reserved for DNS and internet infrastructure purposes:
All two-character combinations (aa-zz, 00-99, a0-z9, 0a-9z) are reserved per ICANN policy:
Current Status (as of 2016): ICANN has authorized the release of two-character ASCII labels through two key authorizations:
Registry Implementation: Individual TLD registries may choose to implement these releases. Unregistry follows conservative policies and reserves most two-character combinations to prevent confusion.
While ICANN has authorized release of most two-character labels, Unregistry maintains conservative reservation policies to prevent confusion and maintain consistency across our TLD portfolio. Most two-character combinations remain reserved on our platform.
Country names, territory names, and their variations are reserved to prevent confusion and protect national interests:
Protected terms from ICANN's official reserved names list, including International Red Cross Movement and Olympic Committee terms:
These terms are officially protected under ICANN's reserved names policy to comply with international treaties and prevent misuse of humanitarian and Olympic organizations' names.
Major brand names and trademark holders across various industries:
Government, military, and official organization terms are reserved to prevent impersonation:
Other categories of reserved terms and special considerations:
This reserved names list is updated regularly to reflect new ICANN policies, trademark registrations, and regulatory requirements. Additional terms may be reserved without prior notice to comply with legal obligations or industry standards.
Use our domain search tool or API to check if a specific domain name is available for registration. Reserved names will be automatically flagged as unavailable.
Search API: GET /api/v2/domains/check/{domain-name}
Web Search: Available on our homepage and pricing page