Resolver.one - DNS-based IP Data Lookup Service
Hey IPinfo community! Excited to share my Hackathon 2025 submission: resolver.one - a high-performance DNS server that delivers IPinfo Lite data directly through DNS queries.
How it Works
Simply query any IP address as a DNS TXT record:
dig TXT 8.8.8.8.rslvr.one
Key Features
- Dual Protocol Support: Handles both UDP and TCP DNS queries on port 53
- IPinfo.io Integration: Powered by IPinfo Lite MMDB database for accurate IP metadata
- Structured Response Format: Returns pipe-separated values with country, continent, ASN, and AS domain info
- Production Ready: Includes health checks, comprehensive error handling, and proper DNS zone support (A, NS, SOA records)
- Built for Scale: Modern Async Python implementation
- Simple API: No authentication needed - just standard DNS queries
Technical Implementation
Built with Python’s asyncio for high concurrency, using dnslib for DNS protocol handling and maxminddb for blazing-fast IP lookups. The server validates queries, ensures they’re within the rslvr.one zone, and returns NXDOMAIN/REFUSED for invalid requests.
Check out the documentation and try it yourself:
Looking forward to your feedback! This project showcases IPinfo’s data accessibility through an unconventional but practical DNS interface.
