The WHOIS Check tool looks up registrant, registrar, and registration date information for any domain, queried directly from the authoritative WHOIS chain.

Unlike DNS records (which tell you how a domain *resolves*), WHOIS tells you who owns it — the legal entity, the registrar it was registered through, and when it was created, updated, and will expire.

1. Enter a domain name (e.g., `example.com` or `telenegar.ir`)
2. Select a probe location
3. Click "Look Up"
4. Review the results

WHOIS is useful for many diagnostic and security scenarios:

• Investigating suspicious emails — check who registered the sender's domain
• Verifying a business — confirm a company owns the domain it claims
• Security research — identify domains registered recently (often malicious)
• Compliance — verify domains meet registration requirements
• Domain portfolio management — track expiry dates across multiple domains

Many registrars offer WHOIS privacy protection, which hides the registrant's personal details behind a proxy service. When this is enabled, you'll see the registrar's privacy service instead of the real owner.

This is common for legitimate sites, but it also means WHOIS alone is not enough to verify ownership — you may need to cross-reference with other tools.

These two systems serve different purposes:

Different top-level domains have different WHOIS servers and formats:

• `.com`, `.net`, `.org` — regulated by ICANN, standardized format
• `.ir` — managed by IRNIC, with its own registration rules
• Country domains — each country manages its own WHOIS policy

Try the WHOIS Check Tool →

tool whois domain registration