Overview

WhoisXML API is the trusted data partner for organizations seeking deeper visibility into the internet’s domain infrastructure. With the world’s largest repository of Whois , DNS, IP, and domain-related data, our APIs and data feeds help security teams, threat hunters, and fraud investigators uncover hidden connections, detect threats early, and make faster, data-driven decisions. From cybercrime prevention to brand protection, WhoisXML API delivers the intelligence you need—on demand, at scale, and with precision.

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

2. 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.

3. 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.

4. Domain Research Suite (DRS)
Access our web-based solution to dig into and monitor all domain events of interest.

Products

1. APIs
2. Data Feeds
3. Web Tools
4. Domain Research & Monitoring
5. Enterprise Packages

1. API

Domain/WHOIS                       DNS/IP                           Intelligence                                          Other

WHOIS API                         DNS Chronicle API           Website Categorization API             MAC Address API
Bulk WHOIS API                    DNS Lookup API              Domain Reputation API                  Screenshot API

2. Data Feeds

Domain/WHOIS                                    DNS/IP                                         Intelligence                                   

WHOIS Database Download                 DNS Database Download              Early DGA Detection Data Feed            
WHOIS History Database Download    Subdomains Database Download   Early Warning Phishing Data Feed  

Other
 Website Categorization Database
 MAC Address Vendor Database 

3. Data Feeds

Domain/WHOIS                        DNS/IP                                   Intelligence                                       Other

WHOIS Lookup                          DNS Chronicle Lookup          Website Categorization Lookup             MAC Address Lookup
Bulk WHOIS Lookup                  DNS Lookup                          Domain Reputation Lookup                  Screenshot Lookup

4. Domain Research & Monitoring

Research                                Monitoring                        White-Label

Reverse WHOIS Search         Domain Monitor                    Domain Research Suite
WHOIS History Search           Registrant Monitor                Brand Monitor 

5. Enterprise Packages

• 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.
• Internet Infrastructure:-Unlock integrated intelligence on Internet properties and their ownership, infrastructure, and other attributes.
• 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:-Offers complete access to WHOIS, IP, DNS, and subdomain data for product enrichment, threat hunting and more.