Top-Level Domain (TLD) Lookup
Search and inspect official gTLD and ccTLD domain extension records.
UTM Campaign Parameter Builder
About Top-Level Domain (TLD) Lookup
The Official Top-Level Domain (TLD) Reference Database provides instant lookup for 1,500+ generic (gTLD), country-code (ccTLD), and brand TLD extensions with registry operators, DNSSEC status, and registration rules.
How to Use Top-Level Domain (TLD) Lookup
Step 1
Type any TLD extension (e.g. `.dev`, `.ai`, `.co.uk`) into the search bar.
Step 2
Inspect extension category, registry organization, and country affiliation.
Step 3
Click to copy technical details.
Practical Use Cases for Top-Level Domain (TLD) Lookup
Domain Name Branding & Extension Research
Look up rare, generic, and country-code domain extensions (e.g. `.io`, `.ai`, `.tech`, `.app`) to check registry policies.
Network Security & Email Spam Filtering
Verify legitimate TLD categories and country affiliations for suspicious domain extensions in email headers.
Input & Output Examples
Looking up `.ai` TLD
Query: "ai"
TLD: .ai | Type: ccTLD (Country Code) | Country: Anguilla | Registry: Government of Anguilla | Popular Use: Artificial Intelligence Tech
Key Features & Performance
- ✓Searchable database of 1,500+ IANA root zone TLDs (gTLDs, ccTLDs, IDNs, and brand TLDs).
- ✓Filters: Country Code (ccTLD), Generic (gTLD), Infrastructure (.arpa), Sponsored (.edu, .gov).
- ✓Displays Registry Operator, country location, DNSSEC support, and WHOIS server host.
- ✓100% Client-Side lookup.
- ✓1-Click Copy TLD data.
Key Terminology & Definitions
ccTLD (Country Code Top-Level Domain)
A two-letter top-level domain reserved for a country or dependent territory (e.g. `.uk`, `.ca`, `.de`, `.jp`).
gTLD (Generic Top-Level Domain)
A top-level domain used by general internet users, such as classic `.com`, `.org`, and modern new gTLDs like `.tech` and `.online`.