Output format: API v3 | Documentation v3 | Website Categorization API | WhoisXML API
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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.

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Monitoring
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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.

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Output format: API v3

{
    "as": {
        "asn": 54113,
        "domain": "https://www.fastly.com",
        "name": "FASTLY",
        "route": "151.101.0.0/22",
        "type": "Content"
    },
    "domainName": "bbc.com",
    "categories": [
        {
            "confidence": 0.99,
            "id": 379,
            "name": "News and Politics"
        }
    ],
    "createdDate": "1989-07-15T04:00:00+00:00",
    "websiteResponded": true
}

Output parameters

domainName
Website's URL
createdDate
The date of initial creation of the WHOIS record for the domain in ISO8601 format. Omitted if the record is not found.
websiteResponded

Determines if the website was active during the crawling. The website is considered to be active if it:

  • Responds within 20 seconds timeout (Connection timeout - 10s, Response read timeout - 10s)
  • Responds with 200 HTTP code
  • Sends Content-Type header which is either text/html or text/plain
categories

The list of possible website's categories. Get all possible categories here.
categories[0].id
The unique category identifier.
categories[0].confidence
The probability of how the category may be relevant for the website.
categories[0].name
The readable name of the category.
as {}
Autonomous System. It works for IPv4 only. The field is omitted if the record is not found.
as.asn
Autonomous System Number
as.domain
Autonomous System Website's URL
as.name
Autonomous System Name
as.route
Autonomous System Route
as.type
Autonomous System type, one of the following: "Cable/DSL/ISP", "Content", "Educational/Research", "Enterprise", "Non-Profit", "Not Disclosed", "NSP", "Route Server". Empty when unknown.