Domain Monitor Tool

Enter a domain to start checking

Query public DNS, HTTP, SSL certificates, and subdomain information.

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Run ID
Task ID
Waiting
Status
Progress
-
Active Subdomains
verified
-
DNS Records
records
-
SSL Certificates
certificates
-
HTTP Records
observations
Waiting
Authorizing
Scanning
Processing
Reading result
SSL supplement
Completed
Error
Waiting for domain input
0%
Block loading progress
Estimated 6 blocks · 0 completed

About the Domain Monitor Tool

This public domain information checker is built for webmasters, developers, and operations teams. It checks DNS resolution, active subdomains, HTTP responses, SSL certificates, email records, and common service providers.

The tool combines public DNS records, site discovery, certificate records, and dictionary candidates. Active subdomains are verified by DNS or public sources; unverified candidates only mean the system tried that name and do not prove the subdomain exists.

  • DNS A / AAAA / CNAME / MX / TXT / NS / HTTPS / SVCB record checks
  • Active subdomain detection with candidates shown separately
  • SSL certificate validity, issuer, remaining days, and errors
  • HTTP status, Server header, and Cloudflare Challenge detection

Usage Tips

Prioritize “Active Subdomains” and “DNS Records”. “Unverified Candidates” are generated from dictionary-based attempts and do not necessarily exist. SSL certificates are usually displayed after the task is complete; while the task is still running, the certificate count may temporarily be 0. The results are based on publicly available network information and do not include any internal system data.