Best Self Hosted Alternatives to DNS Spy

Domain Locker is a self-hosted web app for tracking your domains and certificates in one place. It helps you avoid outages by monitoring expiry dates and basic domain/website status signals, and by surfacing upcoming renewals in a simple dashboard.

Key Features

• Dashboard for tracking domain expiration dates and time-to-expiry
• SSL/TLS certificate expiry monitoring for domains
• DNS and WHOIS-based domain metadata lookups (registrar/expiry where available)
• Status checks for associated websites (basic reachability/health signals)
• Configurable alerts/notifications for upcoming expirations
• Designed for managing multiple domains/services from a single UI

Use Cases

• Keep personal or homelab domains from expiring unexpectedly
• Track renewal windows for small businesses with multiple domains
• Monitor SSL certificate expirations to prevent HTTPS outages

Limitations and Considerations

• WHOIS/registrar data quality and availability varies by TLD/registrar and may be rate-limited
• Some checks depend on external DNS/WHOIS/HTTP reachability and can fail in restricted networks

Domain Locker is useful for anyone who owns multiple domains and wants a lightweight, centralized way to see what is expiring soon. It provides a practical safety net for domain renewals and certificate maintenance with a straightforward, self-managed setup.