dnsbl.io

IP ADDRESS LOOKUP

Query the DNSBL database to check if an IPv4 or IPv6 address is listed. Supports individual addresses and subnet ranges in CIDR notation.

Enter an IPv4 or IPv6 address, or a subnet in CIDR notation

QUERY INFORMATION

• Supports both IPv4 and IPv6 address formats

• CIDR subnet notation supported (e.g., 192.0.2.0/24, 2001:db8::/32)

• Real-time database queries with sub-second response times

• All queries are logged for statistical analysis

• Results include severity classification and reporting history