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WHOIS Lookup Tool

Check domain registration details, find the registrar and expiry date, review nameservers, EPP status codes, DNSSEC status, and raw WHOIS/RDAP data.

Examples google.com github.com openai.com
Domain Registered Active
134.4.64.112
Registered with
Registered
Expires
Domain age
0 days to renew
Created
Updated
Expires
Registrar
Registrar
IANA ID
WHOIS server
Registrar URL
Abuse contact
Abuse phone
Key dates
Registered
Last updated
Expires
Domain age
Until expiry 0 days left
Nameservers
0 NS
Run a DNS lookup
Security
Registrar lock Off
DNSSEC unknown
Privacy protection On
Contacts
GDPR redacted
Registrant
Organization
State
Country
Email
Admin
Organization
State
Country
Email
Technical
Organization
State
Country
Email
Raw WHOIS/RDAP record
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


#
# Query terms are ambiguous.  The query is assumed to be:
#     "n 134.4.64.112"
#
# Use "?" to get help.
#

NetRange:       134.4.0.0 - 134.4.255.255
CIDR:           134.4.0.0/16
NetName:        CALTECH-IPAC
NetHandle:      NET-134-4-0-0-1
Parent:         NET134 (NET-134-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   California Institute of Technology (CIT-4-Z)
RegDate:        1989-04-07
Updated:        2023-08-29
Ref:            https://rdap.arin.net/registry/ip/134.4.0.0


OrgName:        California Institute of Technology
OrgId:          CIT-4-Z
Address:        1200 East California Boulevard
Address:        MS 1-10
City:           Pasadena
StateProv:      CA
PostalCode:     91125
Country:        US
RegDate:        2023-08-22
Updated:        2023-08-22
Ref:            https://rdap.arin.net/registry/entity/CIT-4-Z


OrgTechHandle: CI2-ORG-ARIN
OrgTechName:   Caltech Network Operations Center
OrgTechPhone:  +1-626-395-3500 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/CI2-ORG-ARIN

OrgAbuseHandle: CI2-ORG-ARIN
OrgAbuseName:   Caltech Network Operations Center
OrgAbusePhone:  +1-626-395-3500 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CI2-ORG-ARIN

RAbuseHandle: NETWO4337-ARIN
RAbuseName:   Network Operations
RAbusePhone:  +1-626-395-5980 
RAbuseEmail:  [email protected]
RAbuseRef:    https://rdap.arin.net/registry/entity/NETWO4337-ARIN

RNOCHandle: NETWO4337-ARIN
RNOCName:   Network Operations
RNOCPhone:  +1-626-395-5980 
RNOCEmail:  [email protected]
RNOCRef:    https://rdap.arin.net/registry/entity/NETWO4337-ARIN

RAbuseHandle: CI2-ORG-ARIN
RAbuseName:   Caltech Network Operations Center
RAbusePhone:  +1-626-395-3500 
RAbuseEmail:  [email protected]
RAbuseRef:    https://rdap.arin.net/registry/entity/CI2-ORG-ARIN

RTechHandle: CI2-ORG-ARIN
RTechName:   Caltech Network Operations Center
RTechPhone:  +1-626-395-3500 
RTechEmail:  [email protected]
RTechRef:    https://rdap.arin.net/registry/entity/CI2-ORG-ARIN

RNOCHandle: CI2-ORG-ARIN
RNOCName:   Caltech Network Operations Center
RNOCPhone:  +1-626-395-3500 
RNOCEmail:  [email protected]
RNOCRef:    https://rdap.arin.net/registry/entity/CI2-ORG-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#
Guide

How to read WHOIS and RDAP results

A WHOIS lookup shows public domain registration data. Use it to check domain registration details, confirm which registrar manages the name, find the domain's creation date and expiry date, review nameservers , and inspect the raw WHOIS/RDAP record when you need the original registry response.

RDAP lookup is the modern structured version of domain ownership lookup, while traditional WHOIS records are plain text and vary by TLD. This tool checks RDAP first and falls back to WHOIS when needed, so results can include registrar details, renewal dates, DNSSEC status, abuse contacts, and EPP status codes.

The status codes (EPP codes like clientTransferProhibited ) describe domain lifecycle and security states. Transfer locks help protect a domain against unauthorized transfer, edit, or deletion. Since GDPR and registry privacy policies, many personal contact fields are redacted, but organization, country, registrar abuse contact, and technical fields may still be visible.

Use cases

Common WHOIS checks

Use this domain WHOIS lookup before buying a domain, planning a migration, auditing domain security, or investigating a suspicious hostname. The registrar, expiration checker, transfer lock, nameservers, and raw record are often enough to spot renewal risk or ownership changes.

If the domain is registered, compare the WHOIS or RDAP result with DNS and SSL checks. Nameservers should match the expected DNS provider, DNSSEC should match your security plan, and the expiry date should leave enough time for renewal before service is at risk.

FAQ

Frequently asked questions

What is a WHOIS lookup?

A WHOIS lookup checks public domain registration data, including the registrar, creation date, expiry date, nameservers, status codes, DNSSEC status, and any contact fields the registry or registrar publishes.

What is the difference between WHOIS and RDAP?

WHOIS is the older text-based registration lookup protocol. RDAP is the newer structured format used by many registries. This tool tries RDAP first, then falls back to port 43 WHOIS when needed.

Can I find the domain registrar and expiry date?

Yes. When the registry publishes the data, the result shows the registrar, IANA registrar ID, creation date, last updated date, expiry date, domain age, and days left before renewal.

Why are domain owner details hidden?

Many registrars redact personal contact data because of privacy laws and registry policies. You may still see organization, country, registrar abuse contact, or other non-personal fields when they are public.

What does clientTransferProhibited mean?

clientTransferProhibited is an EPP status code that means the registrar is blocking transfer to another registrar. It is commonly used as a domain security lock against unauthorized transfer.

Why can WHOIS and RDAP results differ?

WHOIS and RDAP can come from different registry or registrar systems, and some fields may update at different times. RDAP is structured, while raw WHOIS records are text and can vary by TLD.