DNS Propagation Checker

Global DNS Propagation Checker - Check DNS propagation across worldwide DNS servers in real-time.

🌐 Live Demo: https://dns-propagation.autocompany.workers.dev

Features

• Global Coverage: Query DNS servers across North America, Europe, Asia, and Australia
• Real-time Results: Get instant DNS propagation status with response times
• Multiple Record Types: Check A, AAAA, CNAME, MX, NS, and TXT records
• Free API Access: Integrate DNS checks into your workflow with our REST API
• Edge Computing: Powered by Cloudflare Workers for fast, global response

Quick Start

Web UI

Visit https://dns-propagation.autocompany.workers.dev and enter a domain to check.

API

# Check A records
curl "https://dns-propagation.autocompany.workers.dev/api/check?domain=example.com&type=A"

# Check MX records
curl "https://dns-propagation.autocompany.workers.dev/api/check?domain=gmail.com&type=MX"

Response Format

{
  "domain": "example.com",
  "record_type": "A",
  "timestamp": "2026-02-18T12:00:00.000Z",
  "results": [
    {
      "server": {
        "name": "Cloudflare",
        "ip": "1.1.1.1",
        "location": "San Francisco",
        "country": "United States",
        "country_code": "US"
      },
      "records": ["93.184.215.14"],
      "query_time": 45,
      "status": "success"
    }
  ],
  "propagated_count": 10,
  "total_count": 10,
  "propagation_percentage": 100
}

Supported DNS Record Types

Type	Description
A	IPv4 address
AAAA	IPv6 address
CNAME	Canonical name
MX	Mail exchange
NS	Name server
TXT	Text record

DNS Servers

We query multiple public DNS resolvers worldwide:

Server	Location	Country
Cloudflare	San Francisco	US
Google	Mountain View	US
Quad9	Zurich	CH
Cloudflare EU	London	GB
Google EU	Amsterdam	NL
DNS.WATCH	Frankfurt	DE
Cloudflare APAC	Tokyo	JP
Google APAC	Singapore	SG
Cloudflare AU	Sydney	AU
Google BR	São Paulo	BR

Use Cases

1. DNS Migration: Verify your DNS changes have propagated globally
2. Troubleshooting: Identify DNS resolution issues across regions
3. Monitoring: Check DNS health for your domains
4. Development: Test DNS configurations before going live

Technology Stack

• Runtime: Cloudflare Workers (Edge Computing)
• Language: TypeScript
• DNS-over-HTTPS: Cloudflare DoH API
• Caching: Cloudflare KV

Local Development

# Clone the repository
git clone https://github.com/brancogao/dns-propagation-checker.git
cd dns-propagation-checker

# Install dependencies
npm install

# Run development server
npm run dev

# Deploy to Cloudflare
npm run deploy

API Rate Limits

Tier	Requests/day	Price
Free	100	$0
Developer	10,000	$9/mo
Agency	Unlimited	$49/mo

License

MIT License - See LICENSE for details.

Author

Built by Auto Company

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