Question 1

What is the difference between WHOIS and ICP Filing?

Accepted Answer

WHOIS queries the global ownership and status of a domain name managed by international organizations (like ICANN and registries). ICP filing is a specific internet information service management system in mainland China; all websites providing services in mainland China must file with the MIIT. If you need to query the ICP filing of a domain, please visit the MIIT ICP/IP/Address/Domain Information Filing Management System.

Question 2

Why is the WHOIS information for some domains missing or sparse?

Accepted Answer

This could be because the domain extension is niche or it is a reserved domain (like a.com). This tool has a built-in RDAP fallback mechanism to provide you with complete data whenever possible. However, if a registry restricts its public query interfaces, the information may still be unavailable.

Question 3

Why is the registrant information empty or redacted?

Accepted Answer

To comply with privacy protection laws like the General Data Protection Regulation (GDPR), the vast majority of domain registrars now hide or redact the name, email, and contact information of individual users by default. This is normal.

Question 4

Does this tool support querying short domains like a.com or zi.com?

Accepted Answer

Yes, fully supported! We have optimized the domain format validation logic to accurately identify and query registration information for various special and short domains, including single-letter and two-letter domains.

Question 5

Is the queried expiration date accurate?

Accepted Answer

We connect in real-time to the WHOIS and RDAP servers of top-level domain registries to get the latest data, which is usually very accurate. Please note that if a domain was just renewed, it might take a few hours to several days for the registry's cache to update.

WHOIS Lookup

Frequently Asked Questions (FAQ)