DNS Checker/Whois & IP Lookup

Fast DNS, Whois & IP lookup.

Free · Designed for iPad. Not verified for macOS.

Compare DNS answers across major resolvers, plus Whois and IP lookup tools. DNS Checker/Whois & IP Lookup is the network reference your phone has been missing. Type any hostname and instantly see the A records returned by Google, Cloudflare, Quad9, Alibaba, and your device's own resolver — side by side. Type any domain and pull live Whois data from the authoritative registry. No accounts, no signup, no fluff. WHY MULTIPLE RESOLVERS? Different DNS servers can return different answers for the same name. ISPs rewrite responses, CDN edges return geo-specific IPs, captive portals lie. By querying several well-known resolvers in parallel and comparing the results in one screen, you can spot DNS rewrites, debug propagation delays, and verify that your records have actually rolled out worldwide — not just in your ISP's cache. DNS LOOKUP - Parallel A-record queries against curated public resolvers - Includes the OS's configured local resolver for an apples-to-apples comparison - Per-server latency so you can see who answered fastest - Clear timeout / error markers when a resolver fails to respond - Recent-queries history for one-tap rerun WHOIS - RFC 3912 client with IANA referral for accurate TLD-to-registry handoff - Optional eTLD+1 normalisation: www.example.com is treated as example.com - Shows registrar, creation / expiry / updated timestamps, EPP status codes, and authoritative name servers - Raw response is always available for when you need the exact text ONE-TAP HANDOFF TO COMPANION TOOLS Found an interesting host? Pass it straight to a focused tool: - Ping it with PingGrid Pro - Web Monitor - Scan its ports with LANFinder - Ping & Port Scan - Check its SSL/TLS certificate with SSL Certificate Checker PRIVACY-FIRST DESIGN - Your queries are sent only to the resolvers and Whois registries you are querying — never to us - No accounts, no logins, no tracking pixels POLISHED TO MATCH YOUR PHONE - Native Material Design 3 user interface - Light and dark themes that follow the system setting - Localised in English, Traditional Chinese, Simplified Chinese, and Japanese WHO IT IS FOR - DevOps engineers and SREs verifying DNS propagation - Web developers debugging CDN routing and caching - Network administrators comparing ISP behaviour - Anyone curious why a domain "is not working" on one device and works fine on another DNS Checker/Whois & IP Lookup is fast, no-nonsense, and respects your privacy. Install it once and forget you ever struggled with nslookup on mobile.

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The developer, Yuan-Yi Chang, 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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data

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

Accessibility

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

Information

Seller
  • Yuan-Yi Chang
Size
  • 37.5 MB
Category
  • Utilities
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPad
    Requires iPadOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
4+
Copyright
  • © 2026 AINFO.APP
  • Developer Website
  • Privacy Policy

    • More by Yuan-Yi Chang

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