Provide current and historical ownership information on domains / IPs. Identify all connections between domains, registrants, registrars, and DNS servers.
Look into all current and historical DNS / IP connections between domains and A, MX, NS, and other records. Monitor suspicious changes to DNS records.
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.
Access our web-based solution to dig into and monitor all domain events of interest.
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.
Detect and block access to and from dangerous domain names before malicious actors can weaponize them. Contact us today for more information.
Unlock integrated intelligence on Internet properties and their ownership, infrastructure, and other attributes.
Our complete set of domain, IP, and DNS intelligence available via API calls as an annual subscription with predictable pricing.
Offers complete access to WHOIS, IP, DNS, and subdomain data for product enrichment, threat hunting and more.
Enjoy priority data access with our premium API services topped with extra perks including dedicated team support, enterprise-grade infrastructure, and SLAs for full scalability and high performance.
Multi-Level API User Administration Now Available - Manage individual API keys for team members in your organization.
Learn MoreGather details about the IP range of a specific IP address such as its netblock borders, last update, organization name, country code, abuse contact information, and more.
Get started1,000 free API requests. No credit card required.
Just take an IP address, company name, or ASN to make a quick review of the corresponding IP range.
All of our IP netblock intelligence is accessible through API calls to enrich your systems and products.
Our entire IP Netblocks WHOIS Database is available in JSON or CSV formats with daily updates.
IP netblocks intelligence, on its own or in correlation with other sources, can provide context to IP addresses that show up in firewall and network logs.
The IP addresses on your web server logs can serve a purpose when correlated with IP netblocks data. By grasping traffic dynamics and structure, you can make informed and strategic marketing and brand protection decisions.
Target specific organizations with personalized ad impressions based on their IP ranges as identified from IP netblocks.
Block IP netblocks based on the location information revealed to effectively enforce network filtering and digital rights management (DRM) policies.
Knowing where your audience is can help you create more personalized content. Run your web server logs through IP netblocks intelligence so you can map out your website visitors’ locations.
Obtaining other netblocks can help expand your web portfolio and open your business up to expansion opportunities. Use IP netblocks’ insights to see the available ranges for acquisition and learn who their owners are.
“WhoisXML API builds out data sets that help users correlate attack infrastructure with related IP and WHOIS information.”
Our APIs are available in an enhanced version that offers better performance with a dedicated load balancer and a premium endpoint to enable faster throttling for large-scale API deployments.
Learn moreAPI access through WhoisXMLAPI can be purchased as an annual subscription. The access pricing is based on the number of queries, which is measured monthly with per-minute rate limits. The pricing structure gives predictability to business planning and solution architecture.
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