Lookup WHOIS & Domain Diagnostic
WHOIS, DNS records, mail security and SSL certificate for any domain, in a single lookup.
WHOIS & RDAP Protocol Architecture
Domain lifecycle, GDPR privacy, EPP status codes, and RESTful modernization.
Legacy WHOIS relied on unformatted text over TCP port 43. RDAP standardizes structured JSON payloads over HTTPS with full i18n support.
After expiry, domains transition from Grace Period (standard price) to Redemption Period (30 days with penalty fee) and 5-day Pending Delete.
Since GDPR in 2018, ICANN mandates masking personal registrant details as 'REDACTED FOR PRIVACY' to prevent harvesting and spam.
EPP status codes like `clientTransferProhibited` safeguard against unauthorized transfers. The `ok` status indicates nominal operational health.
Domain, Lock & Transfer Troubleshooting
Step-by-step fixes for suspended domains, transfer roadblocks, and redemption fees.
Domain in 'serverHold' or 'clientHold' Status
Domain Transfer Failed: 'Domain is Locked' / Bad AuthCode
Domain in Redemption Period / High Restore Fee
Nameservers in WHOIS Mismatched with DNS Host
Did You Know? WHOIS & Domain Trivia
Historical trivia about ARPANET 1982 WHOIS, multimillion sales, and Google's $12 slip.
WHOIS Originated as a People Directory in 1982
Published in RFC 812 by Ken Harrenstien, WHOIS was created to look up real names, physical office rooms, and phone numbers of ARPANET engineers.
cars.com & voice.com: Multi-Million Domain Records
`cars.com` was valued at $872 million USD in corporate filings. In single direct cash sales, `voice.com` sold for $30 million USD in 2019.
When an Ex-Googler Bought google.com for $12 in 2015
Sanmay Ved noticed `google.com` listed as available on Google Domains for $12 USD. He owned it for one minute before Google revoked the purchase and awarded a $12,000 bug bounty.
Extinction of 2- and 3-Letter .com Domains in 1997
All 676 two-letter .com domains and 17,576 three-letter .com combinations were completely sold out by 1997, making them high-value digital real estate.