Subdomain Finder
Validation Error
Target Host Domain
No active subdomains found in our common wordlist scan.
No active subdomains responded to DNS checks for this host.
Discover publicly accessible subdomains associated with any domain name to better understand website structure, online services, and domain infrastructure.
Verify active DNS records and identify valid subdomains that resolve to active servers, helping ensure accurate and up-to-date discovery results.
Explore website infrastructure by identifying public subdomains used for applications, services, APIs, development environments, and other online resources.
Frequently Asked Questions
What is a subdomain?
A subdomain is a subdivision of a primary domain name used to organize different services or sections of a website. Common examples include blog.example.com, mail.example.com, api.example.com, and shop.example.com.
How does the Subdomain Finder work?
DomainScan searches for publicly accessible subdomains by checking common subdomain names and verifying DNS records. Only subdomains that can be resolved through DNS are included in the results whenever possible.
Why can't I find every subdomain?
Some subdomains may be private, protected, recently created, or intentionally hidden from public DNS records. As a result, they may not appear in publicly available lookup results.
What are the most common subdomains?
Frequently used subdomains include www, mail, ftp, api, blog, docs, cdn, dev, staging, shop, support, and portal. Different organizations use subdomains to separate services and applications.
Is there a limit to the number of searches?
DomainScan allows you to perform unlimited subdomain searches. Results depend on publicly available DNS information and the current availability of DNS records.
Can I use Subdomain Finder with other DomainScan tools?
Yes. Combine Subdomain Finder with DNS Lookup, WHOIS Lookup, Reverse IP Lookup, SSL Checker, and Domain Location Lookup to gain a more complete understanding of a domain's infrastructure and online services.