WHOIS Lookup

Look up WHOIS registration data for any IP address, including network range, organization, and abuse contact information.

What WHOIS data includes

🏢
Organization Details
Name and contact information of the network owner or registrant.
📡
Network Range
The CIDR block or IP range registered to the organization.
⚠️
Abuse Contact
Email or contact for reporting network abuse or spam.
📅
Registration Dates
When the network block was first registered and last updated.
🌍
Registry (RIR)
Which Regional Internet Registry manages this IP block.
🔢
ASN Reference
The Autonomous System Number associated with the IP range.

What is WHOIS?

WHOIS is a public database that stores registration information about IP addresses. It includes details about the network range, the organization that owns the IP block, abuse contact information, and registration dates. WHOIS data is essential for network administrators, security researchers, and anyone investigating the origin of internet traffic.

WHOIS records typically contain the name and contact information of the organization that owns the IP address block, the network range assigned, registration and update dates, and abuse contact information for reporting network abuse.

Regional Internet Registries (RIRs) such as ARIN, RIPE NCC, APNIC, AFRINIC, and LACNIC maintain WHOIS databases for IP addresses in their respective regions.

Regional Internet Registries (RIRs)

Registry Region Coverage
ARINNorth AmericaUSA, Canada, parts of Caribbean
RIPE NCCEurope / Middle EastEurope, Russia, Middle East, Central Asia
APNICAsia-PacificAsia, Oceania, Pacific region
LACNICLatin AmericaSouth America, Caribbean
AFRINICAfricaAfrican continent

Frequently Asked Questions

What is a WHOIS lookup?
A WHOIS lookup queries a public database to retrieve registration information about an IP address or network block. It shows who owns the IP range, their contact details, when the block was registered, and which Regional Internet Registry (RIR) manages it.
Is WHOIS data publicly available?
Yes. WHOIS data is a public registry maintained by Regional Internet Registries (RIRs). However, since GDPR and similar regulations, personal contact details (for domain registrations) may be redacted. IP address WHOIS records typically show organizational information rather than individual personal data.
Why might WHOIS show no data for an IP?
Private or reserved IP addresses (e.g. 192.168.x.x, 10.x.x.x) are not registered in WHOIS because they are used in local networks and are not routable on the public internet. Some IPs may also have incomplete or outdated registration records.
How is WHOIS different from geolocation?
WHOIS shows registration data — who owns the IP block and contact details. Geolocation shows the approximate physical location of the device using the IP. They use different data sources: WHOIS comes from RIR databases, while geolocation uses MaxMind or similar commercial databases.