Domain Availability Search — Check Online

This tool checks domain name availability via RDAP (Registration Data Access Protocol) — the modern registry data standard that replaced WHOIS. Popular TLDs are checked: .com, .ru, .net, .org, .io, and more.

What is RDAP?

RDAP is an IETF standard (RFC 7480) that replaced the WHOIS protocol. It returns structured JSON instead of unformatted text, and supports authentication and access control.

How Availability is Checked

• A request is sent to rdap.org — a universal RDAP proxy;
• HTTP 404 response → domain is available (DNS is also checked as a fallback);
• HTTP 200 response → domain is registered; registrar name and dates are parsed from the RDAP object.

Tips for Choosing a Domain

• Use short, memorable names without hyphens in the middle;
• .com is universal; .io and .dev are popular with tech companies and developers;
• Check for trademark conflicts before registering;
• Consider buying multiple TLDs to protect your brand.

Frequently Asked Questions

• How to check if a domain is available for free?

  Enter the domain name in the search bar on the page 101ip.ru/domain-search/, select the zone (.com, .ru, .net, etc.) and click "Search". The result will be displayed within 1-2 seconds. The tool is completely free and does not require registration.

• What is RDAP and how is it better than WHOIS?

  RDAP is a modern protocol for obtaining domain data. It is faster, more secure, and provides structured information (JSON), unlike the outdated WHOIS. Our service uses RDAP so you get accurate data without errors or delays.

• Can I check domains in .io and .org zones using this tool?

  Yes, the tool supports all popular zones, including .io, .org, .com, .ru, .net, and many others. Simply select the desired zone from the list when entering the name. If the required zone is not available, write to us — we will add it.