
Description: DNSchecker is a free open-source tool for checking the configuration of DNS servers and mail servers. It can validate records like MX, NS, SOA, SPF, and more across multiple DNS servers.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Dnsstuff is a free online DNS and network tools provider that offers various utilities for network troubleshooting, analysis and monitoring. Some key tools include DNS report, DNS health check, SMTP test, trace route, whois lookup and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API