# WHOIS / RDAP Lookup

> Look up domain or IP registration info via RDAP. Registrar, status, dates, nameservers, contacts. Free, runs in your browser.

URL: https://uttir.com/whois-lookup
Categories: network-tools, developer-tools
Privacy: Lookups go to the public RDAP registry. Your query is sent to the registry, not to Uttir.

## About

Look up the registration info for any domain or IP via RDAP (the modern, JSON-based successor to WHOIS). Get the registrar, status, dates, nameservers, and contact roles — all from a free public registry.

No login, no API key, no rate-limit trap — just the standard RDAP protocol that the registries themselves serve.

## How to use

1. **Type a domain or IP** — Examples: example.com, github.io, 8.8.8.8, 2001:4860:4860::8888.
2. **Read the registration record** — Status, key dates (registered / updated / expires), nameservers, and contact roles (registrar / registrant / admin / abuse) are all displayed.

## FAQ

### What is RDAP?

RDAP (Registration Data Access Protocol) is the modern, JSON-based replacement for the WHOIS protocol. It returns structured data (registrar, dates, status codes, contacts) instead of the unstructured WHOIS text. RDAP is the standard for all major registries as of 2025.

### Is this the same as WHOIS?

Yes and no. RDAP returns the same registration data that WHOIS does, but in a structured JSON format that is easier to read and parse. If a registry only supports WHOIS (older country-code TLDs), this tool will return an error.

### Why does it work for some TLDs but not others?

.com, .net, .org, .info, .biz, .io, .dev, .app, and most country-code TLDs are supported. Some smaller ccTLDs have not yet deployed RDAP; for those, the tool reports the lookup failed and you can use a traditional WHOIS service.

### Is the lookup private?

Your query is sent to the public RDAP registry (rdap.org + the appropriate registry or RIR). Uttir never sees or stores the request. However, the registry sees your IP in the request headers — same as any other network request.

## Related tools

- [DNS Lookup](https://uttir.com/dns-lookup) — Query DNS records (A, AAAA, MX, TXT, NS, CNAME, SOA, CAA) for any domain using Google DNS-over-HTTPS.
- [IP Geolocation Lookup](https://uttir.com/ip-geolocation-lookup) — Look up geolocation info for any IPv4 or IPv6 address — country, city, ISP, ASN, timezone. Free, runs in your browser.
- [My IP Address](https://uttir.com/my-ip) — See your public IP, approximate location, ISP, and ASN — useful for VPN checks and remote-access setup.
- [CIDR Subnet Calculator](https://uttir.com/cidr-subnet-calculator) — Calculate network, broadcast, mask, wildcard, and host range for any IPv4 or IPv6 CIDR block. Pure math, runs in your browser.

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For the full HTML page with the live tool, visit https://uttir.com/whois-lookup.
This file is the markdown rendering at https://uttir.com/whois-lookup.md. See https://uttir.com/llms.txt for a site-wide summary.