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Host Reputation

Check if an IP address, domain, or URL is listed on any DNSBL blacklists and view detailed reputation data.

1

Enter a Host

Provide an IP address, domain name, fully qualified domain name, or URL to check.

2

Set Rating Threshold

Choose the minimum list rating to filter results. Higher ratings indicate more reputable blocklists.

3

Review Results

See whether the host is listed on any DNSBL blacklists, with detailed per-list results including TXT records and response codes.

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Multi-Format Input

Check reputation for IP addresses, domains, FQDNs, or full URLs — all formats supported.

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DNSBL Coverage

Query multiple DNS-based blacklists in real time to detect listed hosts across different reputation databases.

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Severity Filtering

Filter results by list rating to focus on high-confidence blocklists or include all available sources.

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Detailed Results

View per-list status, TXT records, return codes, and response times for complete transparency.

A DNSBL (DNS-based Blackhole List) is a list of IP addresses or domains published via DNS that are known for sending spam, hosting malware, or engaging in other abusive activity.

You can enter an IPv4 or IPv6 address, a domain name, a fully qualified domain name (FQDN), or a full URL. The system will resolve the host automatically.

List rating ranges from 1 (low confidence) to 3 (high confidence). Setting a higher minimum rating filters out less reputable blocklists.

Host reputation checks perform real-time DNSBL lookups across multiple blocklists. Each list is queried individually, which can take up to 30 seconds for a complete check.

DNS records are cached for approximately 6 hours. Repeated checks within that window will return cached results for faster response.

Host Reputation

How to Use