Question: I'm looking for a fast and reliable domain tracking service that can monitor domains and provide notifications when their status changes.

For a high-performance, reliable domain tracking service, Domainr is a great option. It searches for and suggests domain names directly from domain registry data and offers immediate access to domain name information. Powered by Fastly's edge cloud platform, Domainr offers enterprise-level performance and support for more than 1757 top-level domains, including 179 IDN TLDs. You can track domains of interest and be notified when their status changes, which is useful for security companies and software supply chain managers.

Another service worth mentioning is ChangeTower, which not only tracks domain changes but also monitors website changes. Although geared more for website changes, its multi-condition monitoring and email alerts can be used to track changes to domain status. That makes it a good option for competitive monitoring, SEO and compliance monitoring, and it can be used by people in a variety of fields.

If you need detailed domain information for business intelligence or cybersecurity, Host.io could be the service for you. It offers a broad set of domain name data, including DNS information, website content and backlinks, which can be useful for blocking spam and fraud. With fast and accurate data from Google Cloud and a variety of pricing options, including a free tier, it's a good option for developers who want to build it into their own tools.

For third-party risk management, UpGuard offers continuous monitoring of millions of companies and real-time alerts through services like Jira or Slack. Its continuous scanning and risk assessments offer the most comprehensive view of attack surfaces and third-party security posture, and it can be used to ensure domain security and compliance.