---
title: ToolRouter — Use Case
description: Step-by-step guide for a real-world ToolRouter use case with agent-specific instructions.
url: https://toolrouter.com/tools/whois-rdap/use-cases/lookup-registration-details
---
# Look Up Domain Registration Details

Every registered domain has a public record containing information about who registered it, when, through which registrar, and when the registration expires. This information is essential for verifying domain ownership, contacting domain holders, investigating suspicious domains, and planning domain acquisitions.

The lookup_domain skill queries both WHOIS and the newer RDAP protocol to retrieve comprehensive registration data for any domain. You get registrant information (where available), registration and expiration dates, nameserver details, registrar information, and domain status codes. This is the definitive source for domain registration facts, used by security researchers, legal teams, domain investors, and system administrators daily.

**Tool:** [Whois RDAP](https://toolrouter.com/tools/whois-rdap)
**Skills:** lookup_domain

## Agent Guides

- [How to Look Up Domain Registration with Claude](https://toolrouter.com/tools/whois-rdap/use-cases/lookup-registration-details/claude): Guide for Claude
- [How to Look Up Domain Registration with ChatGPT](https://toolrouter.com/tools/whois-rdap/use-cases/lookup-registration-details/chatgpt): Guide for ChatGPT
- [How to Look Up Domain Registration with Copilot](https://toolrouter.com/tools/whois-rdap/use-cases/lookup-registration-details/copilot): Guide for Copilot
- [How to Look Up Domain Registration with OpenClaw](https://toolrouter.com/tools/whois-rdap/use-cases/lookup-registration-details/openclaw): Guide for OpenClaw
