IP Blacklist Checker | DNSBL Lookup Across Multiple Lists

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IPv4 Calc Wildcard (v4) Range → CIDR (v4) Multiple Subnets Compare (v4)

IPv6 Calc Range → CIDR (v6) Compare (v6)

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URL Address to IP What is My IP? IP Whois Lookup IPv4 to IPv6 Convertor IP Blacklist Checker Connection Logger

IP Blacklist Checker (DNSBL)

DNS over HTTPS

IP address (IPv4 or IPv6)

Results

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DNSBL	Status	Details

Note: Some DNSBLs block public resolvers; if so, status may show “Unavailable”.

Shortcuts: Enter = Calculate, Esc = Clear

RFC 4632 (CIDR) RFC 1918 (Private) RFC 4291 (IPv6)

IP Address

Fast, accurate IPv4/IPv6 subnet tools, built for learners and pros.

IPv4 Calculator
Wildcard (v4)
Range → CIDR
Multiple Subnets
Compare (v4)

IPv6 Calculator
Range → CIDR (v6)
Compare (v6)

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