# DNS Checker/Whois & IP Lookup

> Compare DNS answers across major resolvers, plus Whois and IP lookup tools.

Canonical page: [https://chrome-stats.com/d/app.ainfo.dns.checker](https://chrome-stats.com/d/app.ainfo.dns.checker)

## Overview

- **ID:** `app.ainfo.dns.checker`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Chang Yuan-Yi
- **Category:** TOOLS
- **Downloads:** 102
- **Version:** 1.20260715.1012002
- **Last updated:** 2026-07-14
- **First published:** 2026-05-25
- **Publisher country:** TW
- **Size:** 23 MB
- **Data as of:** 2026-09-12
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=app.ainfo.dns.checker)
- **Website:** [https://www.ainfo.app/dns-checker/](https://www.ainfo.app/dns-checker/)
- **Privacy policy:** [https://www.ainfo.app/dns-checker/privacy/](https://www.ainfo.app/dns-checker/privacy/)

## Description

DNS Checker/Whois &amp; 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&#39;s own resolver — side by side. Type any domain and pull live Whois data from the authoritative registry. No accounts, no signup, no fluff.<br><br>WHY MULTIPLE RESOLVERS?<br><br>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&#39;s cache.<br><br>DNS LOOKUP<br><br>- Parallel A-record queries against curated public resolvers<br>- Includes the OS&#39;s configured local resolver for an apples-to-apples comparison<br>- Per-server latency so you can see who answered fastest<br>- Clear timeout / error markers when a resolver fails to respond<br>- Recent-queries history for one-tap rerun<br><br>WHOIS<br><br>- RFC 3912 client with IANA referral for accurate TLD-to-registry handoff<br>- Optional eTLD+1 normalisation: www.example.com is treated as example.com<br>- Shows registrar, creation / expiry / updated timestamps, EPP status codes, and authoritative name servers<br>- Raw response is always available for when you need the exact text<br><br>ONE-TAP HANDOFF TO COMPANION TOOLS<br><br>Found an interesting host? Pass it straight to a focused tool:<br><br>- Ping it with PingGrid Pro - Web Monitor<br>- Scan its ports with LANFinder - Ping &amp; Port Scan<br>- Check its SSL/TLS certificate with SSL Certificate Checker<br><br>Companion apps not installed? You will be taken directly to the App Store or Google Play to grab them.<br><br>PRIVACY-FIRST DESIGN<br><br>- Your queries are sent only to the resolvers and Whois registries you are querying — never to us<br>- No accounts, no logins, no tracking pixels<br><br>POLISHED TO MATCH YOUR PHONE<br><br>- Native Material Design 3 user interface<br>- Light and dark themes that follow the system setting<br>- Localised in English, Traditional Chinese, Simplified Chinese, and Japanese<br><br>WHO IT IS FOR<br><br>- DevOps engineers and SREs verifying DNS propagation<br>- Web developers debugging CDN routing and caching<br>- Network administrators comparing ISP behaviour<br>- Anyone curious why a domain &quot;is not working&quot; on one device and works fine on another<br><br>DNS Checker/Whois &amp; IP Lookup is fast, no-nonsense, and respects your privacy. Install it once and forget you ever struggled with nslookup on mobile.

## Rankings

- #1,974,079 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.WAKE_LOCK`
- `app.ainfo.dns.checker.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`
- `com.android.vending.CHECK_LICENSE`
- `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE`
- `com.google.android.gms.permission.AD_ID`

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Source: [Chrome-Stats](https://chrome-stats.com/d/app.ainfo.dns.checker)