WHOIS Lookup
Look up domain or IP registration and ownership information.
WHOIS is the public registration database for domains and IP allocations. For a domain it
shows registrar, creation/expiry dates, name servers, and sometimes contact info (often
redacted for privacy). For an IP it shows the RIR (ARIN / RIPE / APNIC / LACNIC / AFRINIC),
the allocated organization, and the address block. We query the authoritative WHOIS server
directly and return the raw response.
Running...
What you'll see
For a domain:
- Registrar — the company that sold and manages the domain (GoDaddy, Namecheap, Cloudflare Registrar, etc.)
- Created / Updated / Expires — dates that tell you the domain's age and renewal status
- Name servers — the authoritative DNS servers for the zone (these should match what DNS lookup shows for NS records)
- Registrant / Admin / Tech contacts — usually masked behind a privacy proxy these days; rarely shows a real name
- DNSSEC status — whether the zone is signed
For an IP:
- NetName / NetRange / CIDR — the block this IP belongs to
- OrgName — the company or institution that holds the allocation
- Country / RIR — which regional registry administers the block
- Abuse contact — where to report misuse coming from this IP
Common use cases
- Verify domain ownership before negotiating to buy it.
- Check expiry — domains that lapse silently are a recurring incident category.
- Identify the network owner of a suspicious IP in your logs, and locate the right abuse-report channel.
- Confirm name-server delegation matches your registrar settings.
Limitations
- Most ccTLDs (.cn, .uk, .jp, etc.) return less data than gTLDs (.com, .net) and rarely show contact info.
- GDPR-style privacy regimes redact most personal data from public WHOIS — that's expected, not a bug.
- WHOIS data can be hours stale compared to the registry's authoritative state; query the registrar's own page for absolute truth.