What is the Domain Name Registration Data Lookup?

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How does the Domain Name Registration Data Lookup work?

The Domain Name Registration Data Lookup website is a javascript-based client application which makes use of the Registration Data Access Protocol (RDAP) to query, parse and display registration data in a human-friendly format. The results displayed come directly from registry operators and/or registrars in real-time. If the queried information is not available in RDAP, the query will be redirected to whois.icann.org. This process is known as a WHOIS failover lookup which occurs when queried information is not available in RDAP and a WHOIS protocol lookup is used as a backup operation to attempt to provide available registration data.

What is the Registration Data Access Protocol (RDAP)?

RDAP is a computer network communications protocol for accessing Domain Name Registration Data in a structured way. RDAP is an alternative to the WHOIS protocol and can be used to look up relevant registration data from such Internet resources as domain names, IP addresses, and autonomous system numbers. In its basic form, RDAP is not intended to offer a “human-friendly” view of the data. However, its structured output does enable more human-friendly services to be created.

What data is available?

When a domain name is registered, the registered name holder must provide a set of information to the registering entity, such as a registrar. That information is referred to as “Domain Name Registration Data.” Due to applicable law and ICANN policies, not all Domain Name Registration Data is required to be returned in response to a lookup request. As a result, there may be variances across registrars and registry operators in what data is returned in response to a lookup request. Please see FAQ “Will all available data be visible?” for more information.

Will all available data be visible?

Some available Domain Name Registration Data may be visible by only those who have demonstrated a legitimate and proportionate purpose for viewing it and have been approved to do so. If the data you are seeking is not visible in response to your lookup request, it may not be available or you should see a remark and/or redacted label in the corresponding result field to indicate that there may be data available which is not visible to you.

Understanding RDAP Lookup Results

The lookup results may come from both registrars and registry operators. The source of each result field is not indicated in the lookup results. Therefore, the following table is intended to help you understand the fields displayed in the lookup results and identify the source of the data.

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