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.
JustChecker supports monitoring domains across virtually any TLD.
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.