Making requests | Documentation | WHOIS History 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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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.

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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.

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Making requests

API endpoints

GET https://whois-history.whoisxmlapi.com/api/v1?apiKey=YOUR_API_KEY&domainName=google.com&mode=purchase
POST https://whois-history.whoisxmlapi.com/api/v1
It takes up to a minute to activate your account after the registration.

Postman collection

Postman is a desktop and web application that allows you to make requests to an API from a graphical user interface. We recommend using Postman with WhoisXML APIs endpoints when exploring the APIs functionality, as well as when you are troubleshooting issues with your application.

The WhoisXML API Postman collection is available at the following links:

The collection includes a preconfigured environment. You will need to set up the api_key variable to fire each request. Get your personal API KEY on the My products page. If you have questions related to the API, contact us.

POST request body sample

{
    "apiKey": "API_KEY",
    "domainName": "google.com",
    "mode": "purchase"
}

Headers

X-Authentication-Token

You can use this header or apiKey parameter for API calls.

Get your personal API KEY on My products page.

Input parameters

apiKey

Required. Get your personal API key on the My products page.
domainName

Required. The domain for which historic WHOIS data is requested.
mode

Optional.

preview – return only the number of WHOIS records available for the domain. 1 request costs 1 DRS credit.

purchase – return all WHOIS records available for the domain. 1 request costs 50 DRS credits.

Acceptable values: preview | purchase

Default: preview
outputFormat

Optional. Response output format.

Acceptable values: JSON | XML

Default: JSON
skipLiveWhois

Optional. The primary function of the WHOIS History API is to retrieve all historical WHOIS records for a given domain from our Historical WHOIS database. By default, the API also includes the domain's most recent WHOIS record in the results. In some cases, this record is cached, ensuring fast response times. However, in most cases, retrieving the latest record requires a live WHOIS query, which can slow down performance.

To optimize performance, you can set the skipLiveWhois flag to 1, which prevents live WHOIS requests. The downside is that if no cached WHOIS record for the domain exists within the last 24 hours, the most recent record will be missing from the results. If you require the latest WHOIS data, you will need to implement additional logic to fetch it separately.

Acceptable values: 0 | 1

Default: 0
sinceDate

Optional. If present, search through activities discovered since the given date. Sometimes there is a latency between the actual added/renewal/expired date and the date when our system detected this change. We recommend using this field in your monitoring tools for filtering daily changes.

Acceptable values: date in "YYYY-MM-DD" format.
createdDateFrom

Optional. If present, search through domains created after the given date.

Acceptable values: date in "YYYY-MM-DD" format.
createdDateTo

Optional. If present, search through domains created before the given date.

Acceptable values: date in "YYYY-MM-DD" format.
updatedDateFrom

Optional. If present, search through domains updated after the given date.

Acceptable values: date in "YYYY-MM-DD" format.
updatedDateTo

Optional. If present, search through domains updated before the given date.

Acceptable values: date in "YYYY-MM-DD" format.
expiredDateFrom

Optional. If present, search through domains expired after the given date.

Acceptable values: date in "YYYY-MM-DD" format.
expiredDateTo

Optional. If present, search through domains expired before the given date.

Acceptable values: date in "YYYY-MM-DD" format.

Free access

After Sign Up you automatically get a free subscription plan limited to 500 DRS credits.

Usage limits and requests throttling

The maximum number of requests per second is 30. In case that the limit is breached, your subsequent requests will be rejected until the next second.

This API is also available with a dedicated load balancer and premium endpoint to enable faster querying as part of our Premium API Services and Enterprise API Packages.