Unlock past domain and IP associations via lookups | WhoisXML API

Domain to IP, IP to domain—Unlock historical connections instantly

DNS Chronicle Lookup lets you perform a forward search for any FQDN to find its historically connected IP addresses or a reverse search for an IP address’s past connected FQDNs—all within seconds. Test it now.

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

Why use DNS Chronicle Lookup?

  • Bidirectional lookups

    Access historical DNS data points based on the data you already have, whether it’s an IP address or a domain name.

  • Deep DNS history

    Tap into our market-leading passive DNS database with billions of recorded events collected and aggregated for years.

  • Fast and easy

    Generate lookup reports within seconds. Copy or download the results in JSON format for deeper analysis.

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Practical Usage

  • Threat detection

    Quickly review the historical connections of suspicious domains and IP addresses interacting with your network.

  • Attack surface discovery

    Obtain a full list of domains and subdomains historically linked to known IP addresses and could represent forgotten or shadow assets.

  • Malicious infrastructure tracking

    Analyze the DNS activity timeline of known malicious domains and IP addresses to uncover their connections over a specific period.

  • Domain monitoring

    Audit your domain’s IP connections over time, and look for unusual or unauthorized changes that may indicate misconfigurations or compromise.

DNS Chronicle Lookup | WhoisXML API

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