If you want to search for the registrar, registrant, registration date and expiration date of a domain name, Whois Domain Lookup is your best tool.

When it comes to expired domains, however, the expiration date may not be accurate. You need to contact the registrar for detailed information.

1. Choose a Whois Domain Lookup tool, such as  https://www.namemart.com/domain/whois

2. Enter the domain name you need to search, such as 123.com

3. In the search results, you can find everything you need to know about this domain.

This is how you search for the expiration date of a domain.