= Reverse DNS Lookup Detector
:description: Learn how the ReverseDNSLookupDetector in OpenNMS {page-component-title} tries to detect if a given IP address can be found in PTR records.

The ReverseDNSLookupDetector tries to detect if a given IP address can be found in PTR records.

== Detector facts

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| Implementation | `org.opennms.netmgt.provision.detector.rdns.ReverseDNSLookupDetector`
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== Configuration and use

The ReverseDNSLookupDetector does not take any parameters.

== Examples

Use the ReverseDNSLookupDetector in <<operation:deep-dive/provisioning/auto-discovery.adoc#ga-provisioning-auto-discovery-detectors, auto discovery with detectors>> to discover IP addresses that only resolve FQDN.