Analyze a Domain from Multiple Perspectives
Discover active subdomains to uncover domain value.
This subdomain lookup tool reveals the complete digital infrastructure behind any domain, helping you assess its true commercial value. Domains with multiple active subdomains typically indicate established businesses with higher market value, making them better investment targets or acquisition opportunities.
Our subdomain lookup tool helps you understand a company's digital footprint and business complexity. Active subdomains like api.domain.com, shop.domain.com, or mail.domain.com indicate operational services, revealing business scale and potential revenue streams that affect domain valuation.
Yes, the ABTdomain subdomain lookup tool is completely free for both personal and commercial use. Perfect for domain investors, business analysts, and market researchers conducting due diligence. However, please do not abuse the service, as excessive usage may result in a temporary IP ban.
Yes, our method is completely legal and ethical. We use passive reconnaissance techniques by aggregating data from various publicly available sources, such as search engines, public DNS records, and certificate transparency logs.
Our tool **does not perform any active scanning, brute-forcing, or intrusive checks** on the target domain. We only show what is already available in the public domain, ensuring our service is safe and respectful of others' infrastructure.
No tool can guarantee a 100% complete list. The results represent a snapshot from public data sources at a specific point in time. Some discovered subdomains may no longer be active, and some active subdomains may not appear in public records.
Think of this tool as a powerful starting point for your research, not as a definitive and exhaustive map of a domain's infrastructure.
This tool is intended for legitimate business analysis, domain investment research, and security research conducted with proper authorization. You are responsible for using the information provided in an ethical and legal manner.
Using the data from this tool for unauthorized security assessments, vulnerability scanning, spam, or any other malicious activity is **strictly prohibited**. Abuse will result in an IP ban.