IP Blacklist Check
Check if an IP address is listed in email spam blacklists (DNSBLs).
Data Collection Info
This tool queries DNS-based blacklists (DNSBLs) via Google DNS. We check 8 major spam blacklists including Spamhaus, Spamcop, and Barracuda. The queried IP is sent to Google's DNS servers.
Blacklist Check
Enter an IPv4 address to check against spam blacklists.
What are blacklists?
DNS-based Blacklists (DNSBLs) are lists of IP addresses known for sending spam. Email servers check these lists to filter incoming mail. Being listed can cause email delivery issues.