Free Domain Name Tools – WHOIS Lookup, DNS & Email Checkers

No login required. Check WHOIS and RDAP data, DNS and email records (SPF, DKIM, DMARC), blacklists, and more, then get notified when domains you care about change.

Whois Lookup Tool – Free, Private Domain WHOIS & RDAP Search

Run instant, privacy-friendly WHOIS and RDAP lookups to see domain owner, registrar, registration dates, and nameservers for any gTLD. Fast in-browser checks with no data stored on our servers.
Domain Blacklist Checker – Spamhaus DBL Lookup Tool

Free domain blacklist checker. See if your domain is listed on Spamhaus DBL and hurting email reputation. Instant check, no signup, lookups not stored.
SPF, DKIM & DMARC Checker Tool – Check Email Records for Domain

Free SPF, DKIM, DMARC checker tool. Enter your domain to validate email authentication records, spot issues, and boost deliverability instantly.