WHOIS Lookup
Query target
Free online WHOIS lookup tool. Enter a domain or IP to view registrar, registrant, creation date, expiration date, and domain status. Smart key field extraction, color-coded expiration warnings, and one-click summary copy.
Free online WHOIS lookup tool. Enter a domain or IP to view registrar, registrant, creation date, expiration date, and domain status. Smart key field extraction, color-coded expiration warnings, and one-click summary copy.
WHOIS records include: Registrar, Registrant (person/organization), Creation Date, Updated Date, Expiration Date, Status Codes, Name Servers (NS), etc. Due to GDPR privacy protection, after 2018 most registrars redact personal information like registrant name, email, and phone, showing proxy or REDACTED instead.
WHOIS is a protocol born in the 1980s, based on plain text, port 43, with inconsistent formats. RDAP (Registration Data Access Protocol) is the ICANN-mandated successor to WHOIS, based on HTTP/JSON, structured output, internationalization support, and built-in access control. This tool tries RDAP first, falling back to traditional WHOIS on failure.
We recommend renewing at least 30 days before expiration. The tool uses color alerts: green >60 days (normal), yellow 14-60 days (prepare to renew), red <14 days (urgent). Note: Grace periods vary by registrar; after expiration you may not be able to renew at regular price, and some registrars immediately enter redemption period (requiring high redemption fees).
Main reasons: 1) GDPR privacy protection (required by EU since May 2018; most registrars enable WHOIS privacy by default, showing proxy information); 2) Privacy protection services offered by registrars (like WhoisGuard, Domains By Proxy); 3) Some TLDs (like .com.cn/.de) do not disclose full registrant information; 4) Domain was just registered or transferred, WHOIS cache not updated.
Most traditional WHOIS servers have rate limits (e.g., Verisign limits ~1000 queries per IP per day); frequent queries may result in temporary bans. This tool queries via backend proxy with automatic caching and retry, but we don't recommend high-frequency batch queries on the same domain.
This is a 'transfer lock' set by the registrar, a default security setting at the vast majority of registrars to prevent unauthorized transfers to other registrars. If you need to transfer the domain, you must first unlock it at your registrar (disable transfer protection), then obtain an Auth Code/EPP Code to initiate the transfer. This is not an abnormal status.
Yes. This tool supports entering IP addresses, returning the RIR (Regional Internet Registry: APNIC/ARIN/RIPE/LACNIC/AFRINIC), assigned organization, IP range, country/region, ASN, and other information, suitable for cybersecurity analysis and IP ownership confirmation.
IP Geolocation LookupWHOIS is an internet standard protocol for querying domain and IP address registration information, born in 1982 and one of the internet's oldest protocols. Through WHOIS lookup, you can obtain 'registration identity information' for a domain or IP address - who the registrar is, who the registrant/organization is, when it was registered, when it expires, current status, what DNS servers are used, which organization and country the IP belongs to, and more.
**Why is WHOIS lookup important?** For domain owners, forgetting to renew domains is the most common cause of domain loss - regularly checking expiration dates and setting renewal reminders is fundamental domain management. For security professionals, WHOIS attribution of attack IPs is foundational data for threat intelligence and incident response. For domain investors and corporate legal teams, WHOIS information is critical evidence for domain purchase decisions, dispute resolution (UDRP), and brand protection.
**WHOIS vs RDAP**: Traditional WHOIS is based on port 43 plain text protocol, with wildly varying output formats across registries, making programmatic parsing difficult, with no access control or privacy protection mechanisms. RDAP (Registration Data Access Protocol) is the ICANN-mandated successor to WHOIS, based on HTTP/JSON, structured output, internationalization support, built-in differential queries and access control, formally required by ICANN starting 2025. This tool uses RDAP first, falling back to traditional WHOIS when RDAP is unavailable.
**GDPR's impact on WHOIS**: After the EU GDPR implementation in May 2018, public disclosure of registrant name, address, phone, email and other personal information was deemed illegal. Now in WHOIS results for the vast majority of gTLD domains, registrant fields appear as REDACTED or proxy information, retaining only non-personal information like registrar, registration date, expiration date, DNS servers, and status codes. This is normal, not a query error.
This tool initiates WHOIS/RDAP queries from backend servers (avoiding browser CORS restrictions), with **smart field extraction** compatible with different registrar format differences, automatically parsing registrar, registrant, time fields and status codes, and providing **color-coded expiration alerts** (green >60 days/yellow 14-60 days/red <14 days), supporting one-click summary copy and full raw JSON view. Supports both domain and IP query modes.
| TLD | Type | Registry | WHOIS Server |
|---|---|---|---|
.com | gTLD | Verisign | whois.verisign-grs.com |
.net | gTLD | Verisign | whois.verisign-grs.com |
.org | gTLD | PIR | whois.pir.org |
.cn | ccTLD | CNNIC | whois.cnnic.cn |
.com.cn | ccTLD | CNNIC | whois.cnnic.cn |
.io | ccTLD | Nic.io | whois.nic.io |
.ai | ccTLD | Nic.ai | whois.nic.ai |
.dev | gTLD | whois.nic.google |
| Status Code | Meaning | Effect |
|---|---|---|
ok | Active status | Domain is active, renewable and transferable |
clientTransferProhibited | Registrar transfer lock | Prevents unauthorized domain transfers; enabled by default at most registrars |
clientUpdateProhibited | Update prohibited | Domain information cannot be modified; protects domain security |
clientHold | Registrar DNS hold | Domain will not resolve; usually due to incomplete verification or disputes |
serverHold | Registry DNS hold | Resolution stopped at registry level; contact registry to resolve |
redemptionPeriod | Redemption period | ~30 days after expiration; domain can be redeemed at a premium price |
pendingDelete | Pending delete | 5 days after redemption period ends; available for re-registration after deletion |
autoRenewPeriod | Auto-renew grace period | ~0-45 days after expiration (varies by registrar); can be renewed at regular price to restore |
| Stage | Duration | Recoverable | Description |
|---|---|---|---|
| Active | Registration term | Normal renewal | Active use, renewable at any time |
| Auto-Renew Grace Period | 0-45 days | Renew at regular price | Domain may have stopped resolving, but normal renewal restores it |
| Redemption Period | ~30 days | Premium redemption (typically $100-200) | Domain is deleted and enters redemption; only original registrant can redeem |
| Pending Delete | 5 days | Cannot be recovered | Awaiting deletion; released for public registration after 5 days |
| Released for Re-registration | After deletion | Public dropcatch | Anyone can register; first-come, first-served |