Retrieve WHOIS data for domains and IP addresses in structured JSON format. Built for security teams, OSINT analysts and infrastructure monitoring.
A WHOIS lookup provides registration and ownership details for a domain name or an IP address. It reveals registrar information, registration dates, name servers and network allocation data.
The IP Ninja WHOIS JSON API supports both:
All responses are returned in clean, structured JSON format for easy integration.
{
"domain": "TESLA.COM",
"status": [
"client delete prohibited",
"client transfer prohibited",
"client update prohibited",
"server delete prohibited",
"server transfer prohibited",
"server update prohibited"
],
"dates": {
"created": "1992-11-04T05:00:00Z",
"updated": "2024-10-02T10:15:20Z",
"expires": "2026-11-03T05:00:00Z"
},
"nameservers": [
"A1-12.AKAM.NET",
"A10-67.AKAM.NET",
"A12-64.AKAM.NET",
"A28-65.AKAM.NET",
"A7-66.AKAM.NET",
"A9-67.AKAM.NET",
"EDNS69.ULTRADNS.BIZ",
"EDNS69.ULTRADNS.COM",
"EDNS69.ULTRADNS.NET",
"EDNS69.ULTRADNS.ORG"
],
"dnssec": false,
"registrar": {
"name": "MarkMonitor Inc.",
"organization": null,
"address": null,
"email": null,
"phone": null,
"handle": null
},
"contacts": {
"registrant": [],
"admin": [],
"technical": [],
"abuse": [
{
"name": "",
"organization": null,
"address": null,
"email": "abusecomplaints@markmonitor.com",
"phone": "tel:+1.2086851750",
"handle": null
}
]
}
}{
"range": "8.8.8.0 - 8.8.8.255",
"cidr": "8.8.8.0/24",
"name": "GOGL",
"handle": "NET-8-8-8-0-2",
"type": "DIRECT ALLOCATION",
"organization": {
"name": "Google LLC",
"organization": null,
"address": "",
"email": null,
"phone": null,
"handle": null
},
"registration_date": "2023-12-28T17:24:33-05:00",
"updated_date": "2023-12-28T17:24:56-05:00",
"contacts": {
"abuse": [
{
"name": "Abuse",
"organization": "Abuse",
"address": "",
"email": "network-abuse@google.com",
"phone": "+1-650-253-0000",
"handle": null
}
],
"technical": [
{
"name": "Google LLC",
"organization": "Google LLC",
"address": "",
"email": "arin-contact@google.com",
"phone": "+1-650-253-0000",
"handle": null
}
],
"administrative": [
{
"name": "Google LLC",
"organization": "Google LLC",
"address": "",
"email": "arin-contact@google.com",
"phone": "+1-650-253-0000",
"handle": null
}
]
}
}WHOIS intelligence helps identify asset ownership, infrastructure relationships and network attribution.
The WHOIS endpoint integrates seamlessly with other intelligence APIs for comprehensive infrastructure analysis.
Discover all domains hosted on a specific IP address.
Learn more →Map full attack surfaces by discovering subdomains.
Learn more →Enrich IP addresses with geographic and ASN data.
Learn more →One API key. Multiple endpoints. Flexible subscription tiers.
View plans →Yes. The WHOIS JSON API supports domain WHOIS and IP WHOIS lookups using a single unified endpoint.
All WHOIS responses are normalized and returned in structured JSON format for easy integration.
Under GDPR regulations, many registrars redact personal contact information (name, email, address) from public WHOIS records. IP Ninja returns all available data provided by the registry, including technical status and registrar details.
Domain WHOIS provides information about the registration of a specific domain name (registrar, expiration). IP WHOIS (or RDAP) provides details about the network block, the owning organization, and the ASN associated with an IP address.
WHOIS access is available across subscription tiers with different rate limits.
Query domains and IP addresses with a single API key — part of the complete IP Ninja OSINT platform.