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Spamhaus IP and Domain Reputation Checker vs MultiRBL: catalog facts
Spamhaus IP and Domain Reputation Checker	MultiRBL
Free Free lookups.	Free Free to use, with optional Bitcoin donations.
Web	Web
Checks both IP addresses and domains Results come from Spamhaus itself	Checks over 200 blacklists and whitelists Supports IPv4 and IPv6
Covers Spamhaus blocklists only	No help with removal requests Plain interface with lots of technical output
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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