Domain Checker is described as 'Obtain domain name status information with this effective and intuitive application that allows you to batch process multiple entries. Domain Checker is a simple, but powerful whois lookup tool for users that require a domain availability analyzer'. There are more than 10 alternatives to Domain Checker for Online / Web-based, Self-Hosted solutions and Windows. The best alternative is JsonWhois.io, which is free. Other great apps like Domain Checker are WhoisAPI (Freemium), Whois (Free), EZwhois (Free) and ICANN WHOIS (Free).
JsonWhois is the leading cloud hosted Whois API. The service serves WHOIS records for domains and IP addresses through a fully RESTful API. Additionally, the service offers IP geolocation and URL to screenshot services. Free usage per month!.
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.
Bulk Whois API is a provider of parsed WHOIS data in JSON with simple API, competitive pricing, and top notch support. We support all TLDs including new gTLDs as well as IP addresses. Spend no more than necessary to get WHOIS data for your business.
Active Whois Browser is useful network information utility what allow finding information about owners of internet domains and IP adresses. Lookup country, persons and postal adresses of who use domain or IP address.
Domains Index’s WHOIS Database Download provides domainers with a massive domain dataset. It covers more than 80% of the 340 million registered domain names to date, ensuring they get an all-inclusive and up-to-date domain and zone file list.