Products APIs Data Feeds Web Tools Domain Research & Monitoring Enterprise Packages AI Deep Research
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.

New gTLD Intelligence Services (NGIS)
New gTLD Intelligence Services (NGIS)

Independent, evidence-based DNS and abuse intelligence for applicants, advisors, governments, and counsel participating in the ICANN 2026 New gTLD Program.

Research
Monitoring
White-Label
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.

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.

Attack Surface Discovery API
Attack Surface Discovery API

Uncover entire attack surfaces with this API to embed asset discovery, vulnerability scanning, and technology metadata into your platform. Now in early access.

MCP Server
MCP Server

Talk to our APIs using LLMs. Connect your preferred LLM to WhoisXML API and simply chat about WHOIS, DNS, threat intelligence, and more.

Jake AI
Jake AI

I’m your Domain Intelligence Assistant. I make it easy to explore WHOIS, DNS, and threat data from WhoisXML API — I’m cloud-based, fast, and always ready to help.

WhoisXML API Domain Intelligence Advisor (via ChatGPT)
WhoisXML API Domain Intelligence Advisor (via ChatGPT)

A custom GPT for WHOIS, DNS, IP, and threat intelligence research. Connects ChatGPT directly to WhoisXML API to enable fast, conversational investigations and domain insights.

Discover what you really pay for when buying commercial Internet intelligence data.

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Making requests Output format Error codes Server-to-Server OAuth
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Output format

{
    "search":"gmail.com",
    "result":{
        "count": 10000,
        "nextPageSearchAfter": "www.gmail.com",
        "records":[
            {
                "domain":"alt1.smtp.gmail.com",
                "firstSeen":1571374592,
                "lastSeen":1592164815
            },
            {
                "domain":"alt118.gmail.com",
                "firstSeen":1553876927,
                "lastSeen":1592164709
            },
            {
                "domain":"imap.gmail.com",
                "firstSeen":1571394086,
                "lastSeen":1595857361
            },
            {
                "domain":"mta-sts.gmail.com",
                "firstSeen":1571402941,
                "lastSeen":1592203333
            },
            {
                "domain":"pop.gmail.com",
                "firstSeen":1571399508,
                "lastSeen":1595857437
            },
            {
                "domain":"smtp-relay.gmail.com",
                "firstSeen":1571375257,
                "lastSeen":1595857445
            },
            {
                "domain":"smtp.gmail.com",
                "firstSeen":1571375229,
                "lastSeen":1595526061
            },
            {
                "domain":"www.gmail.com",
                "firstSeen":1586736000,
                "lastSeen":1595857483
            },
            ...
        ]
    }
}

Output parameters

search
The target domain name.
result
The resulting object.
count
Number of records in result segment.
nextPageSearchAfter
Pagination cursor for the next page. Pass it back as the searchAfter parameter to fetch the next page. An empty string ("") means there is no next page. Returned by the v2 endpoint only.
records
Contains info about the resulting data: a domain name and timestamps.
records[0].domain
Domain name
records[0].firstSeen
Timestamp of the first time that the record was seen.
records[0].lastSeen
Timestamp of the last update for this record.