Domain Tools

TLD Information

Look up information about a domain's TLD (top-level domain) - its registry operator and WHOIS server.

Enter a domain to look up information about its TLD (e.g. .com, .io, .org) - its registry operator and WHOIS server.

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JustChecker supports monitoring domains across virtually any TLD.

What Is TLD Information?

The TLD (top-level domain) is the last part of a domain, such as .com, .in or .dev. This tool asks IANA's root database which registry operates the TLD and which WHOIS server serves it.

When to Use It

Before registering a domain in an unfamiliar extension.
To find the right WHOIS server for a country-code TLD.

How to Use It

Enter a domain or TLD.
Read the registry operator and WHOIS server.

Understanding the Result

The registry operator runs the whole TLD, for example Verisign for .com and NIXI for .in. Registrars sell domains on the registry's behalf.

Limitations

Registration rules and prices for each TLD are not included - check with the registry or a registrar.

Frequently Asked Questions

A TLD ("Top-Level Domain") is the final segment of a domain name - .com, .org, .in, .co.uk - each operated by its own registry organization under specific rules, pricing, and sometimes eligibility requirements.

Country-code TLDs (like .in or .de) and some specialty TLDs often require local presence, a specific business type, or other eligibility criteria set by that TLD's registry - generic TLDs like .com typically have no such restrictions.

The registry operator maintains the authoritative database for every domain registered under that TLD and operates its nameservers - it's a different role from a registrar, which is who you actually purchase a domain through.

Generic TLDs (.com, .org, etc.) carry no inherent search ranking advantage or penalty; country-code TLDs can influence geo-targeting signals for search results in that specific country.

Registry pricing varies widely based on the TLD's perceived value, restrictions, and the registry operator's own pricing model - premium or specialty TLDs can cost substantially more than a standard .com.

Yes, though rarely - this typically happens if a registry migrates its infrastructure or if ICANN reassigns TLD operation to a different registry operator entirely.