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Who.isDNS Spy
Freemium

Lookups are free; domain history reports and monitoring are paid services.

 Freemium

Monitoring is paid with a 7-day free trial; some one-off tools are free.

Web Web
  • WHOIS, RDAP, DNS and IP lookups in one site
  • Reverse nameserver lookup
  • Record-level change alerts checked from multiple locations
  • Domain and SSL expiry tracking in one place
  • Full domain history requires a paid report
  • Monitoring is a premium service
  • Continuous monitoring requires a paid plan
  • Hosted service only
Web application, Hosted service Hosted service
Closed source Closed source
License not stated License not stated
Not stated if an account is needed Account needed
Needs internet Needs internet

Checked September 23, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.