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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- 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.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Christian Cleberg
