Introduction

RDAP CLI is a fast, modern command-line tool for querying RDAP (Registration Data Access Protocol) servers. Built for developers, sysadmins, and security researchers.

🌐 Domain Queries

Retrieve registration information including nameservers, status, and registrar details.

📡 IP Lookups

Query IP address allocation from regional internet registries.

🔢 ASN Information

Look up Autonomous System Number registration and routing info.

🚀 Auto-Discovery

Automatically discovers appropriate RDAP servers using bootstrap.

Installation

RDAP CLI is distributed as self-contained executables with no runtime dependencies. Download the latest release for your platform:

Download the binary

Download rdap-win-x64.zip from the latest release.

Extract and install

Expand-Archive rdap-win-x64.zip -DestinationPath C:\Tools\rdap
$env:Path += ";C:\Tools\rdap"

Verify installation

rdap --version

Download the binary

Download rdap-linux-x64.tar.gz from the latest release.

Extract and install

sudo tar -xzf rdap-linux-x64.tar.gz -C /usr/local/bin/
sudo chmod +x /usr/local/bin/rdap

Verify installation

rdap --version

Download the binary

Download rdap-osx-x64.tar.gz (Intel) or rdap-osx-arm64.tar.gz (Apple Silicon) from the latest release.

Extract and install

sudo tar -xzf rdap-osx-*.tar.gz -C /usr/local/bin/
sudo chmod +x /usr/local/bin/rdap
sudo xattr -d com.apple.quarantine /usr/local/bin/rdap

Verify installation

rdap --version

No runtime dependencies required

All binaries are self-contained with Native AOT compilation. No .NET runtime installation needed.

Quick Start

Once installed, you can immediately start querying RDAP servers:

Domain Lookup

Query domain registration information:

rdap domain example.com

Returns information including:

Domain status and registration dates
Nameserver configuration
Registrar details
DNSSEC status

IP Address Lookup

Query IP address allocation:

rdap ip 8.8.8.8

Returns information including:

IP range and CIDR notation
Network name and type
Organization details
Geographic location

ASN Lookup

Query Autonomous System Number information:

rdap asn 15169

Returns information including:

AS name and description
Registration details
Organization information

Advanced Usage

JSON Output

Get raw JSON output for scripting:

rdap domain example.com --json

Custom Server

Query a specific RDAP server directly:

rdap domain example.com --server https://rdap.verisign.com/com/v1/

Verbose Output

Enable detailed logging:

rdap domain example.com --verbose

License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

You are free to:

Share — copy and redistribute the material in any medium or format

Under the following terms:

Attribution — You must give appropriate credit
NonCommercial — You may not use the material for commercial purposes
NoDerivatives — If you remix, transform, or build upon the material, you may not distribute the modified material