DomainDig

DNS lookup & SSL certificates

Free · Designed for iPad. Not verified for macOS.

DomainDig is a fast, no-frills domain inspection tool for developers, sysadmins, and anyone who manages or troubleshoots servers and infrastructure. Enter any domain and run a full diagnostic in seconds: DNS: query A, AAAA, MX, NS, TXT, and CNAME records including wildcard entries, with TTL values and reverse DNS (PTR) lookup for the resolved IP. SSL/TLS: inspect the full certificate chain: common name, SANs, issuer, validity dates, and days until expiry with automatic color-coded warnings. Email Security: parse SPF, DMARC, and DKIM records with pass/fail indicators so you can verify email deliverability at a glance. HTTP Headers: fire a HEAD request and review all response headers, with security-relevant headers (HSTS, CSP, X-Frame-Options, and more) highlighted automatically. Redirect Chain: trace every HTTP redirect hop from initial request to final destination, with status codes at each step. Reachability: measure TCP latency on ports 80 and 443, and scan common ports (FTP, SSH, SMTP, MySQL, PostgreSQL, and more) to see what's open. IP Geolocation: look up the hosting org, city, region, and country for the resolved IP, with a live map view. All results load in parallel and independently. Save domains for quick re-runs, browse full lookup history with cached results, and export everything as a plain text file. No accounts. No ads. No tracking.

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Updated screenshots, support URL, and privacy policy URL

The developer, Christian Cleberg, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Provider
    • Christian Cleberg
    Size
    • 2.1 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 26.0 or later.
    • iPhone
      Requires iOS 26.0 or later.
    • iPad
      Requires iPadOS 26.0 or later.
    • Mac
      Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 26.0 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2026 Christian Cleberg