Free & Open Source DNS Analysis Tool | Live Site
A comprehensive DNS analysis and mail server diagnostics tool built with Next.js, TypeScript, and Python Flask. Achieve 95% parity with IntoDNS while remaining completely free and open source.
DNSBunch is a completely free alternative to IntoDNS, providing professional-grade DNS diagnostics without any cost or registration requirements. Perfect for:
- System Administrators - Validate DNS configurations
- Email Administrators - Troubleshoot mail delivery issues
- Security Professionals - Audit DNS security settings
- Developers - Debug domain setup for projects
- Students & Learners - Understand DNS infrastructure
100% Free | No Registration | No Data Storage | Open Source
- Live Site: https://www.dnsbunch.com/
- GitHub Repository: ProgrammerNomad/DNSBunch
- Primary Developer: Nomad Programmer (ProgrammerNomad)
- Version: 0.0.2
- Status: Production Ready (95% IntoDNS Parity)
- Last Updated: 2026-01-02
- License: MIT (Free to use, modify, and distribute)
- 15+ NS (Nameserver) Checks - Parent delegation, comparison, recursive queries, same class, response testing, subnet diversity, glue records, hostname validation, ping tests
- 6 SOA Checks - Record display, serial consistency, REFRESH/RETRY/EXPIRE/MINIMUM validation
- 10 MX Checks - Record display, name validity, count validation, CNAME check, IP publicity, duplicate detection, PTR records
- Missing Nameserver Detection - Separate checks for "Missing At Domain" and "Missing At Parent"
- Material-UI v7 with responsive design
- Dual Display Modes - Normal (simple) and Advanced (detailed) formats
- Clean Output - No JSON/arrays, human-readable text formatting
- Compact Footer - Real technology logos (React, TypeScript, Material-UI, Python, Flask)
- Version Badge - Linked to CHANGELOG for transparency
- CSRF Protection - JWT tokens with IP + User-Agent binding
- Rate Limiting - 50 requests per 5 minutes to prevent abuse
- Input Validation - RFC-compliant domain validation
- No Data Storage - Complete privacy, no logging of queries
- Async DNS Operations - Fast parallel queries
- Auto-Reload - Development mode with instant updates
- Production Optimized - Next.js SSR with code splitting
- CDN Ready - Netlify deployment with global edge network
- Domain NS records display
- TLD Parent Check
- Your nameservers are listed
- DNS Parent sent Glue
- Nameservers A records
- Parent Delegation - NS records from TLD servers
- Domain Nameservers - NS records from domain servers
- Comparison - Parent vs Domain NS mismatch detection
- Missing At Domain - NSes at parent but not at domain (NEW!)
- Missing At Parent - NSes at domain but not at parent (NEW!)
- Recursive Queries - Test if NS allows recursive queries
- Same Class - Verify all NS are class IN
- DNS Servers Responded - Test each NS response
- Different Subnets - Geographic distribution validation
- Glue For NS Records - IP addresses for each nameserver
- Name Of Nameservers Valid - RFC-compliant hostname validation
- Is Ping Nameservers Work - ICMP ping test
- Multiple Nameservers - Redundancy check
- SOA Record - Display primary nameserver, hostmaster, serial, etc.
- SOA Serial Consistency - All NS agree on serial number
- SOA Refresh - Recommended: 86400 (24 hours)
- SOA Retry - Recommended: 7200 (2 hours)
- SOA Expire - Recommended: 3600000 (~6 weeks)
- SOA Minimum - Default TTL validation
- MX Records - Display with priority, hostname, IP, glue status
- MX Name Validity - All MX resolve to IP addresses
- MX Count - Multiple MX for redundancy
- MX CNAME Check - No CNAME pointing (RFC 2181)
- MX IPs are Public - No private IP addresses
- MX is not IP - All are hostnames, not IPs
- Different MX Records - Consistency across nameservers
- Mismatched MX A - No differing IPs for same hostname
- Duplicate MX A - No duplicate IPs across MX
- Reverse MX A (PTR) - PTR records for all MX IPs
- WWW A Record - Resolution and IP display
- IPs are public - Public IP validation
- WWW CNAME - CNAME record validation
- Backend: Python 3.9+, pip, virtualenv
- Frontend: Node.js 18+, npm
# Clone repository
git clone https://github.com/ProgrammerNomad/DNSBunch.git
cd DNSBunch
# Backend setup
cd backend
python -m venv .venv
.venv\Scripts\activate # Windows
# source .venv/bin/activate # Linux/Mac
pip install -r requirements.txt
python app.py # Runs on http://localhost:5000
# Frontend setup (new terminal)
cd frontend
npm install
npm run dev # Runs on http://localhost:3000# Frontend production build
cd frontend
npm run build
npm start
# Backend production (with Gunicorn)
cd backend
gunicorn -w 4 -b 0.0.0.0:5000 app:app- Framework: Next.js 15.5.9 (React 19.1.1)
- Language: TypeScript 5.9.2
- UI Library: Material-UI 7.3.1
- HTTP Client: Axios with CSRF integration
- Query Management: TanStack Query
- Deployment: Netlify
- Framework: Python Flask 2.3.3
- DNS Library: dnspython 2.4.2
- Security: PyJWT, Flask-CORS
- Async: asyncio for parallel DNS queries
- Deployment: Render.com / VPS
| Feature | IntoDNS | DNSBunch | Status |
|---|---|---|---|
| NS Checks | 12-15 | 13-15 | 100% |
| SOA Checks | 6 | 6 | 100% |
| MX Checks | 11 | 10 | 95% |
| Output Format | Clean text | Clean text | Matched |
| Missing NS Detection | Separate checks | Separate checks | Matched |
| Free to Use | Yes | Yes | Yes |
| Open Source | No | Yes | Better! |
| Modern UI | No | Yes | Better! |
| API Available | No | Yes | Better! |
Overall Parity: ~95%
- 30+ DNS checks across NS/SOA/MX
- Clean text formatting (no JSON)
- Missing nameserver detection
- Production deployment
- DNSSEC Validation - Full chain of trust verification
- SPF/DMARC/DKIM - Email authentication checks
- CAA Records - Certificate authority validation
- IPv6 Support - AAAA record analysis
- AXFR Test - Zone transfer security check
- Dark Mode - Eye-friendly theme toggle
- Export Results - PDF/JSON/CSV export
- Result Sharing - Shareable links with unique IDs
- Multi-Domain Batch - Check multiple domains at once
- History - Browser-based result history (localStorage)
- DNS Monitoring - Schedule periodic checks with alerts
- Comparison Tool - Compare 2 domains side-by-side
- API Access - RESTful API for integrations
- Webhooks - Real-time notifications for changes
- TTL Tracker - Monitor DNS propagation progress
- Knowledge Base - DNS tutorials and best practices
- Video Tutorials - Screen recordings for common tasks
- Blog - DNS tips, tricks, and news
- Community Forum - Q&A and discussions
- Certification Guide - DNS administration learning path
- White Label - Custom branding for businesses
- Team Collaboration - Shared workspaces
- RBAC - Role-based access control
- Audit Logs - Compliance tracking
- SLA Monitoring - Uptime and performance metrics
DNSBunch is free forever and open source. Here's how you can contribute:
- Star the repo on GitHub
- Report bugs via GitHub Issues
- Suggest features you'd like to see
- Share with colleagues and on social media
- Write testimonials about how DNSBunch helped you
- Fix bugs and submit pull requests
- Add features from the roadmap
- Improve documentation
- Enhance UI/UX
- Write tests for better coverage
- Create tutorials on YouTube
- Write blog posts about DNS diagnostics
- Mention in podcasts or livestreams
- Share on social media
DNSBunch is currently sponsored by friends who use it daily. If your organization benefits from DNSBunch:
- GitHub Sponsors - Support ongoing development
- Buy Me a Coffee - One-time contributions
- Corporate Sponsorship - Logo placement, priority support
- CHANGELOG.md - Version history and updates
- API Documentation - Complete API reference with examples
- DNS Records Guide - Detailed DNS record type documentation
- Domain: Sponsored by friends who use DNSBunch daily
- Frontend Hosting: Netlify (Free tier)
- Backend Hosting: Render.com / VPS
- CDN: jsDelivr for technology logos
- Next.js - React framework
- Material-UI - Component library
- dnspython - DNS query library
- Flask - Python web framework
- IntoDNS - Industry standard for DNS checking
- DNS Community - RFCs and best practices
We welcome contributions! See our roadmap above for ideas.
- Fork the repository
- Create feature branch:
git checkout -b feature/amazing-feature - Commit changes:
git commit -m 'Add amazing feature' - Push to branch:
git push origin feature/amazing-feature - Open Pull Request
- TypeScript for all frontend code
- Python type hints for backend
- Material-UI for UI components
- Comprehensive error handling
- Security-first approach
MIT License - Free to use, modify, and distribute. See LICENSE file for details.
- Questions: GitHub Discussions
- Bugs: GitHub Issues
- Security: Contact maintainer directly
Made by the open source community
DNSBunch - Free DNS Diagnostics for Everyone