rdaptastic is described as 'High-performance lookup tool that provides structured, augmented registry data for domains, IPs, and ASNs through an intuitive, click-through interface' and is an app. There are five alternatives to rdaptastic for Web-based. The best rdaptastic alternative is WhoisAPI, which is free. Other great apps like rdaptastic are ip.me, DomainTools, ICANN WHOIS and digga.
WhoisAPI is the premier provider of freshly parsed whois data for domain names and IP addresses, also providing IP to geolocation, HTML to PDF, and domain availability RESTful HTTP APIs. Billing is performed on a pay as you go basis, free monthly use.
Domain name research, including comprehensive Whois Lookup, Reverse Whois Lookup and Whois History. Domain name monitoring tools and buyer/seller tools...
ICANN (Internet Corporation for Assigned Names and Numbers) WHOIS search lets you lookup any generic domain to find out the registered domain owner and related information.
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