Reverse DNS API | SOA, TXT, and CNAME to Domains | WhoisXML API

Reverse DNS API lists all domains associated to a specific record

Reverse DNS API lets you search for domain names connected to an SOA, a TXT, or a CNAME record with outputs in JSON and XML.

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500 free API credits. No credit card required.

50 Billion+Domains and subdomains
116 Billion+DNS records
7,596+gTLDs and ccTLDs tracked
52,000+Satisfied customers

Benefits

  • Versatile API queries

    Start with diverse DNS data points—SOA, TXT, or CNAME—and refine results using Active and Wildcard flags.

  • Exhaustive DNS database

    Reverse DNS API taps into our market-leading DNS database with billions of recorded DNS associations and data points.

  • Easily integrable

    Integrate the API into existing solutions to automate the collection of relevant DNS associations for your users seamlessly.

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Practical Usage

  • DNS misconfiguration detection

    Detect and address issues in CNAME records and DNS configurations to mitigate threats like subdomain takeovers and malicious redirections.

  • DNS-based asset discovery

    Identify domains associated with specific SOA, TXT, or CNAME records to uncover hidden assets and dependencies within your DNS infrastructure.

  • Threat intelligence enrichment

    Uncover domains with specific TXT, SOA, or CNAME records associated with threat actor campaigns, malware delivery, or phishing infrastructures.

  • Spam prevention

    Verify sender authenticity and uncover spam-linked domains, enhancing blacklist accuracy and email authentication.

Reverse DNS API | WhoisXML API

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DNS Database Download

Access everything at once with downloadable files

Need bulk access to TXT, SOA, and CNAME records in your local environment? Learn more about our DNS Database Download.

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