DNSChecker.org - Check DNS Propagation worldwide. DNS Checker provides name server propagation check instantly. Changed nameservers so do a DNS lookup and check if DNS and nameservers have propagated.

Whoisology - Connected database of whois records and whois history

Whats My DNS - Instantly check your domain names current IP address and DNS record information against multiple name servers located in different parts of the world.

Bulk Whois API - Bulk Whois API is a provider of parsed WHOIS data in JSON with simple API, competitive pricing, top notch support, and more.

NsLookup.io - A simple and powerful tool for querying DNS records

WhoisAPI - WhoisAPI is the premier provider of freshly parsed whois data for domain names and IP addresses...