Making requests | Documentation | DNS Chronicle 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.

Research
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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Making requests

API endpoint

POST https://dns-history.whoisxmlapi.com/api/v1
It takes up to a minute to activate your account after the registration.

Request body example

{
    "apiKey": "YOUR_API_KEY",
    "searchType": "forward",
    "recordType": "a",
    "domainName": "slack.com"
}

Search the IPv4 addresses in the history that referenced the "slack.com" domain.

Input parameters

apiKey

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

Required. Type of search.

Acceptable values: forward | reverse

Forward search allows you to find all IP addresses that are related to a specific domain name.

Reverse search allows you to find all domain names that are related to a specific IP address.

Default: undefined
recordType

Required. Type of DNS records among which the search is performed.

Acceptable values: a | aaaa

Default: undefined
domainName

Required if searchType = "forward". The target domain name.
ipAddress

Required if searchType = "reverse". The target IP address.

IPv4 address is available for the a record type.

IPv6 address is available for the aaaa record type.
limit

Optional. Max count of returned records.

Acceptable values: 1 - 10000

Default: 10000
after

Optional. Pagination object for the response.
outputFormat

Optional. Response output format.

Acceptable values: JSON | XML

Default: JSON

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 10. 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.