Registrant Alert Overview | 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
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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 Lookup Suite Pricing

Find out which domains were added or dropped by registrants, with given search criteria

Search across all registered and dropped domain names for the registrant's specific details.

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500 free API requests. No credit card required.

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

Our Registrant Alert product line includes:

  • Registrant Alert API

    Registrant Alert API

    Integrate our API into existing security platforms, workflows, and other tools to investigate domains that have been added or dropped by registrants based on given search criteria.

    Explore API
  • Registrant Alert Lookup

    Registrant Alert Lookup

    Easily retrieve a list of domains registered or dropped in the past seven days based on any registrant’s specific details found in WHOIS records via our GUI.

    Explore Lookup
  • Registrant Monitor

    Registrant Monitor

    Monitor newly registered, updated, or deleted domain names associated with specific individuals or companies with our Domain Research Suite (DRS) platform’s smart interface and advanced pivoting capabilities.

    Explore Suite

Benefits

  • Precise

    Helps you set up program to receive notifications whenever specified individuals or organizations register or delete domains.You can backtrack the alerts by setting the sinceDate request parameter.

  • Catchall

    The Registrant Alert API searches new .com, .net, .org, .biz, .mobi, .us, .pro, .coop, .asia and thousands of gTLDs and ccTLDs for your specified registrant or terms.

  • Flexible

    Search results can be filtered based on registration or expiration date. For example, if you want records only within the last year, you can do that.

  • Up-to-date

    By default, the result contains all the domain names registered or dropped on the most recent day. Your program can monitor each set of terms by submitting a single query each day.

Practical usage

Protect Against Cybersquatting

Protect your or your customers' domains against abuse by keeping an eye out on domain registrants known for cybersquatting. Using their names or other registrant details as search criteria can help you stay abreast of their moves, especially if they register look-alikes of your domains.

Monitor Your Competitors

Keep track of your competitors’ business moves. The domains they recently acquired could signify a new product/service launch, an ongoing merger and acquisition (M&A), or a new company launch. Use their registrant’s name as a Registrant Alert monitoring term to get automated notifications.

Build Up Your Domain Portfolio

Use your favorite domain registrant’s name as a monitoring term to get notified as soon as lucrative-looking domains get dropped.

Registrant Alert Overview | WhoisXML API

Get 500 free API credits. No credit card required.

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