Look Up WHOIS Information and Domain Ownership Details
WHOIS lookup to check domain ownership, registration, expiration. Domain WHOIS, WHOIS checker, domain age checker. Free online domain checker.
Before you register a new domain, buy one from a marketplace, or investigate a competitor, you need to know who owns it, when it was registered, and when it expires. WHOIS data provides all of this and more: registrar information, name servers, domain status flags, and the domain's age. This tool queries the RDAP (Registration Data Access Protocol) database, which is the modern successor to the classic WHOIS protocol, and presents the results in a clean, readable format. No command line, no parsing raw text, no signup.
Finding out if a domain name is available
Before brainstorming names for your new project, check WHOIS to see if the domain is already registered. If it is, the WHOIS data tells you when it expires - you might be able to grab it when the current owner lets it lapse.
Evaluating domain age for SEO
Search engines consider domain age as one of many ranking factors. Older domains tend to have more established backlink profiles and trust signals. This tool calculates the exact age of any domain from its registration date.
Investigating suspicious websites
If a website looks questionable, checking its WHOIS data can reveal red flags: a recently registered domain, a registrar known for abuse, or status flags indicating the domain is locked or pending deletion. A domain registered last week claiming to be an established company is a warning sign.
Tracking your own domain's expiration
Missing your domain's renewal date can result in losing it entirely. A quick WHOIS check shows your exact expiration date, your current registrar, and your name server configuration - useful for verifying that everything is set up correctly.