OpenRDAP is a command-line client for the Registration Data Access Protocol (RDAP). It retrieves registration information about domain names, IP addresses, autonomous system numbers and other internet resources from RDAP servers.
RDAP provides a structured alternative to the traditional WHOIS protocol, using HTTP and JSON to exchange registration information. This allows clients to process registry responses more consistently and supports additional query types beyond basic domain lookups.
OpenRDAP automatically identifies the appropriate server for many common queries using bootstrap information published by the Internet Assigned Numbers Authority (IANA). More specialized operations can be directed to a specified RDAP server.
The software is suitable for network administrators, domain researchers and developers who need registration data in either human-readable or machine-readable form.
This is free and open source software.
Key Features
- Retrieves RDAP records for domain names, IPv4 and IPv6 addresses, and autonomous system numbers.
- Supports registration entity, nameserver and server help queries.
- Provides domain, nameserver and entity search operations.
- Automatically detects query types for common internet resources.
- Uses IANA bootstrap data to discover authoritative RDAP services.
- Supports custom RDAP server URLs and bootstrap services.
- Offers plain text, formatted JSON, raw response and WHOIS-style output.
- Provides optional local caching of bootstrap information.
- Supports configurable query timeouts.
- Recognizes tagged RDAP entity handles.
- Supports X.509 client certificate authentication.
- Provides a verbose mode for inspecting requests and responses.
Website: github.com/openrdap/rdap
Support:
Developer: Tom Harwood
License: MIT License
OpenRDAP is written in Go. Learn Go with our recommended free books and free tutorials.
Related Software
| Alternatives to whois | |
|---|---|
| GNOME Nettool | Performs ping, netstat, traceroute, port scans, lookup, and whois (GUI) |
| jwhois | Improved whois client |
| ipwhois | Retrieve and parse whois data for IPv4 and IPv6 addresses |
| OpenRDAP | Command line RDAP client implementation in Go |
| quien | Terminal-based domain intelligence toolkit |
| rdapper | Simple console-based RDAP client |
| rdapper (TypeScript) | Node library that performs domain registration lookups |
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