Registrant Alert Lookup for Connected Domains | 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
WhoisXML API Predictive Threat Intelligence
Predictive Threat Intelligence

Detect and block access to and from dangerous domain names before malicious actors can weaponize them. 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.

Learn More
×
Contact Us
API docs Integrations Pricing

Registrant Alert Lookup: Keep an eye out for every move a specific domain owner makes

From any registrant’s specific details found in WHOIS records, such as a name, an email address, a phone number, and other details, gather a list of all registered or dropped domains in the past seven days.

774 Million+Domains tracked
21.0 Billion+WHOIS records
7,596+TLDs and ccTLDs tracked
52,000+Satisfied customers

What Is a Registrant Alert Lookup?

A registrant alert lookup can help you check if a registrant of interest has recently acquired or dropped a domain.

Tracking a registrant’s activities can support cybercriminal investigations and help monitor signs of new business activities (e.g., mergers and acquisitions (M&As), product launches, etc.).

Registrant Alert Lookup

Why Use Registrant Alert Lookup?

  • Comprehensive Results

    Get an instant picture of all of the domains added and dropped by a registrant in the past seven days. Results are gathered in real-time, supported by a comprehensive review of all newly registered and just expired domain names.

  • Easy to Use and Share

    Each registrant alert lookup report is easy to navigate and comes with a dedicated URL that you can share right away with your cybersecurity, marketing, or domain acquisition team members.

Practical usage

Improve Your Domain Monitoring and Filtering Efforts

Improve Your Domain Monitoring and Filtering Efforts

  • Are you tracking the moves of a person of interest, such as a potential member of an attack group? Registrant Alert Lookup can be of great use to you.
  • Building an attacker profile is doable with the help of registrant alert lookups that clue you into domain record changes associated with a specific individual or organization.

Protect Your Brand from Infringement and Abuse

  • Registrant Alert Lookup can let you search if your brand or trademarks are suffering abuse from adversaries. You can quickly collect updates on every domain registration-related move a potential infringer makes.
  • Keep an eye out for known cybersquatters by tracking their domain registration activities with registrant alert lookups.
Protect Your Brand from Infringement and Abuse
Enhance Your Marketing and Portfolio Expansion Strategies

Enhance Your Marketing and Portfolio Expansion Strategies

  • Want to know what your biggest competitors are up to? Check their domain ownership changes for clues on new product or service launches and discontinuances.
  • Due diligence is critical when deciding to expand or contract a business. Stay abreast of market and industry developments by tracking your peers’ domain registrations via Registrant Alert Lookup.
Registrant Alert Lookup | WhoisXML API

Get 500 free API credits. No credit card required.

Get started