Seven lookups that answer one question: what is this domain, technically? Run them when you're sizing up a new client or a competitor.
- DNS lookup — the domain's records (A, MX, TXT, and friends).
- WHOIS lookup — registration data: registrar, dates, status.
- Domain age — how long the domain has existed.
- Subdomain finder — subdomains visible for the domain.
- IP lookup — where an address resolves and who operates it.
- Hosting checker — who hosts the site.
- CMS detector — what the site is built on.
Run a lookup
Enter the domain and run. The lookups chain naturally: domain age and WHOIS for history, hosting and CMS for the stack, DNS when email or verification records are the question.
Read the results
Domain age matters in SEO conversations because old domains carry history — check it before promising quick wins on a three-month-old domain.
The CMS answer tells you which integration → fits.
Missing DNS records — no MX, no SPF — are findings worth passing to whoever runs the client's IT.
Limits and usage
- The lookups read public records. Privacy-protected WHOIS returns the registrar's proxy data — that's all anyone can see.
- The subdomain finder reports publicly observable subdomains, not a guaranteed-complete inventory.
If something isn't working
CMS detection says "unknown". Heavily customized or headless sites hide their stack — that's an answer too.
WHOIS shows wrong-looking dates. A domain that expired and was re-registered restarts its history — the age tool reads the current registration.