Learning Articles

Deep dives on DNS history, passive DNS, and web intelligence—notes from our investigations and how-to guides for practitioners.

    Latest Articles

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    Tony Perez (@perezbox)
    What Is Passive DNS? Exploring DNS History for Security Investigations

    Learn how Passive DNS works, why DNS history matters, and how DNSArchive helps with domain investigations and threat analysis.

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    Tony Perez (@perezbox)
    How to Look Up Historical DNS Records for Any Domain

    Learn how to perform DNS history lookups, why historical DNS records matter, and how DNSArchive helps investigate past domain and IP infrastructure.

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    Tony Perez (@perezbox)
    Tracking Domain Infrastructure Over Time with DNSArchive

    Explore how DNSArchive lets you analyze changes in domain infrastructure, from IP mappings to name servers, helping researchers detect patterns and uncover hidden relationships.

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    Tony Perez (@perezbox)
    How DNS Changes Can Reveal Malicious Infrastructure

    DNS records that change frequently or irregularly can indicate malicious intent. Learn how to use DNSArchive to spot threat signals early through DNS-based forensics and infrastructure monitoring.