Check the website URL in the browser address bar
Use a WHOIS lookup tool
Check the domain registration details in a DNS lookup service
Look at the email address domain part after the @ symbol
Inspect the website source or headers for domain references
Use command-line tools like nslookup or dig
Check the SSL certificate details in the browser
Review the hosting or DNS provider account
Search the company’s official website or contact page
Use a domain search or domain availability tool