Domains & Subdomains Discovery API | WhoisXML API
Products APIs Data Feeds Web Tools Domain Research & Monitoring Enterprise Packages
WHOIS / WHOIS History
WHOIS / WHOIS History

Provide current and historical ownership information on domains / IPs. Identify all connections between domains, registrants, registrars, and DNS servers.

DNS / DNS History
DNS / DNS History

Look into all current and historical DNS / IP connections between domains and A, MX, NS, and other records. Monitor suspicious changes to DNS records.

IP Geolocation / IP Netblocks
IP Geolocation / IP Netblocks

Get detailed context on an IP address, including its user’s geolocation, time zone, connected domains, connection type, IP range, ASN, and other network ownership details.

Domain Research Suite (DRS)
Domain Research Suite (DRS)

Access our web-based solution to dig into and monitor all domain events of interest.

Domain Research Suite (DRS)
Domain Research Suite (DRS)

Get access to a web-based enterprise-grade solution to search and monitor domain registrations and ownership details for branded terms, fuzzy matches, registrants of interest, and more.

Research
Monitoring
White-Label
Predictive Threat Intelligence Feeds
Predictive Threat Intelligence Feeds

Predictive threat intelligence is your best first line of defense. Subscribe to the feeds to strengthen your cybersecurity posture. Contact us today for more information.

WhoisXML API Internet Infrastructure
Internet Infrastructure

Unlock integrated intelligence on Internet properties and their ownership, infrastructure, and other attributes.

Enterprise API Packages
Enterprise API Packages

Our complete set of domain, IP, and DNS intelligence available via API calls as an annual subscription with predictable pricing.

Security Intelligence (SI) Suite
Security Intelligence (SI) Suite

Offers complete access to WHOIS, IP, DNS, and subdomain data for product enrichment, threat hunting and more.

Multi-Level API User Administration Now Available - Manage individual API keys for team members in your organization.

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API docs Integrations Pricing

Find domains and subdomains related by specific terms in their hostnames

With one API call, you will get a list of all linked domains and subdomains containing specified terms.

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500 free API credits. No credit card required.

9.6 Billion+Subdomains
15 Million+Subdomains discovered daily
52,000+Satisfied customers
15+Years of data crawling

Benefits

  • Complete and precise

    Our Domains & Subdomains Discovery API works for nearly all top-level domains (TLDs), which now exceeds 7,596.

  • Based on up-to-date data

    All the domains and subdomains that appear in the search results come from a huge database gathered for over 10 years of data crawling. The database is growing daily by an average of 15 million newly discovered subdomains.

  • Unified results

    All information is well-parsed and normalized into either Extensible Markup Language (XML) and JavaScript Object Notation (JSON) format for easy integration with your business processes.

Practical usage

Cybercrime prevention

Cybercrime prevention

Need to know which domains and subdomains may have ties to cybercrime? Domains & Subdomains Discovery API data can help mitigate phishing, malware-enabled, and other attacks.

Cybersecurity solution enhancement

Want to enhance cybersecurity solutions in development? Integrate Domains & Subdomains Discovery API into your solutions and services to better protect your customers against harmful communications and websites, vulnerability exploits, and other threats.

Expand blacklists

Even by merely examining lists of domains and subdomains, you can strengthen protection by including all suspicious entities, even those not identified as indicators of compromise (IoCs), in your blacklists to prevent possible harm.

Marketing research

Need a hand in getting to know your competitors better? Scrutinize their recently-created domains and subdomains to identify potential business expansion avenues. The results can be good jumping-off points for market prospecting and understanding which products are part of an organization’s tech stack, as shown by the presence of certain product names in subdomains.

Marketing research
Brand protection

Brand protection

Want extra protection from trademark and copyright violators? Ensure that lookalike domains cannot adversely affect your brand reputation by fooling your customers and audiences into thinking they are dealing with you. Take action against cybersquatters and fraudsters who aim to benefit from your new product and service launches, settlement initiatives, and other high-profile activities.

Domains & Subdomains Discovery API | WhoisXML API

Get 500 free API credits. No credit card required.

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Domains & Subdomains Discovery API Domains & Subdomains Discovery API

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