About DomainDetails.com
A modern, privacy-first domain information lookup service built for speed, transparency, and accessibility.
Our Mission
A Simple Bytes Company
At Simple Bytes, we're committed to building quality tools that respect your privacy and work at the speed of thought. DomainDetails.com embodies this mission by being:
Fast & Local-First
Your data stays on your device. Searches are stored locally using IndexedDB, ensuring instant access to your history without server dependencies.
Privacy-Focused
We don't track your searches or sell your data. What you look up is your business, and your search history never leaves your device.
Free as in Beer
Core features are completely free. No hidden costs, no paywalls for basic lookups. Pro features exist to support development, but most tools remain free forever.
Free & Private by Default
Our commitment to keeping domain research accessible
Always Free Features:
- Unlimited domain WHOIS and RDAP lookups
- DNS record checking with Cloudflare DNS-over-HTTPS
- Local search history with IndexedDB (never sent to our servers)
- Registration and renewal price comparisons
- Bulk domain lookup tool (up to 100 domains)
- MCP Server for AI integration
- Chrome Extension
- TLD information and knowledge base
Privacy Guarantees:
- No tracking - We don't log your searches or build profiles
- No cookies for free users - Browse anonymously without accounts
- Local-first architecture - Your data lives on your device
Pro features (domain monitoring, history tracking) require an account and help fund development, but the core domain lookup tools will always be free and private.
The Transition from WHOIS to RDAP
Understanding the evolution of domain registration data protocols
What is WHOIS?
WHOIS (pronounced "who is") is the original protocol for querying domain registration data, developed in the 1980s. It provides information about domain name registration, including registrant details, registration dates, and nameserver information.
WHOIS Limitations:
- No standardized data format
- Limited support for internationalization
- Basic security features
- No built-in privacy protection
- Query rate limiting varies by server
What is RDAP?
Registration Data Access Protocol (RDAP) is the modern successor to WHOIS. Developed by the Internet Engineering Task Force (IETF), RDAP addresses many of WHOIS's limitations and provides a more robust, standardized way to access registration data.
RDAP Advantages:
- Standardized JSON responses
- Full support for internationalized domain names
- Built-in authentication and access control
- Structured query parameters
- Consistent rate limiting
- Better privacy protection mechanisms
RDAP Adoption Timeline
| Date | Milestone | Status |
|---|---|---|
| March 2019 | ICANN requires all gTLD registries and registrars to offer RDAP | Completed |
| 2019-2023 | ccTLD registries begin adopting RDAP | Ongoing |
| 2024-2025 | Expected phase-out of port 43 WHOIS for many TLDs | Planned |
How DomainDetails.com Works
Local-first, privacy-focused domain lookups
Our Lookup Process
We use a multi-protocol approach that prioritizes your privacy while delivering accurate domain information:
- RDAP First: We attempt to fetch data using modern RDAP (Registration Data Access Protocol), which provides structured, standardized JSON responses.
- WHOIS Fallback: For TLDs that haven't implemented RDAP yet, we automatically fall back to traditional WHOIS queries via our backend.
- Local Storage: Your search history is saved in IndexedDB on your device, never sent to our servers, giving you instant access to past lookups.
- In-Browser DNS: DNS lookups happen directly in your browser using Cloudflare's DNS-over-HTTPS, no backend required.
Optional Pro Features (Support Development):
- Domain Monitoring: Server-side monitoring with email notifications for domain changes (up to 10 domains)
- Historical Data: 90 days of change tracking with visual diff viewer
- Priority Support: Direct access to our team for questions and feature requests
Pro subscriptions help fund development and keep the core tools free for everyone.
Looking Up a Domain?
Enter a domain name to get comprehensive registration information
Additional Resources
Support Development
Help keep DomainDetails free and private for everyone
DomainDetails will always offer free, privacy-first domain lookups. If you find value in our tools and want to support ongoing development, consider upgrading to Pro. Your subscription helps us:
- Keep the core tools free for everyone
- Build new privacy-focused features
- Maintain and improve existing tools
- Cover server and infrastructure costs
Domain Monitoring
Track up to 10 domains with email alerts
Change History
90 days of tracked changes with visual diffs
Priority Support
Direct access to our team