DNS AURORA

Languages: English | 简体中文 | 日本語 | Deutsch

A fast DNS diagnostic web tool: enter domains and record type, query multiple resolvers, and view latency, RCODE, answers, and raw JSON.

Features

• Supports A/AAAA/CNAME/MX/TXT/NS/SOA/SRV/CAA/PTR/ANY
• Supports UDP / TCP / Auto (UDP, TCP on truncation)
• Built-in public/resolvers.json (500+ public DNS, add custom IP[:port])
  • List data is a snapshot from public-dns.info nameservers.csv
• Multi-domain benchmarking (sorted by slowest result to avoid "laggy" resolvers)
• UI language switcher: EN / 中文 / 日本語 / DE

Quick Start

Requires Node.js 18+ (uses built-in fetch).

npm install
npm run start

Open:

• http://127.0.0.1:3000

Custom port (Windows PowerShell):

$env:PORT=8080; npm run start

See START.md for a short, Windows-focused checklist.

Configuration

• PORT: listen port (default 3000)
• MAX_SERVERS: max resolvers per query (default 800)
• MAX_NAMES: max domains per query (default 20)
• MAX_QUERY_PAIRS: max pairs per query (servers × names, default 5000)
• DNS_CONCURRENCY: concurrent queries (default 60)

Notes

• Queries are sent by the server (not the browser), ideal for an online tool.
• The server must reach external DNS over UDP/TCP 53, otherwise requests will time out.
• If you want a static site (e.g. GitHub Pages) with DoH (DNS over HTTPS), you can adapt the UI to fetch DoH JSON directly.