Skip to main content
Your IP
address is
Log in
Log in
User
Dashboard
Settings
Profile and security information
Log Out
Search
all requests subject to
terms of use
Search
IP Addresses & ASNs
Get Started
ARIN Account Management
Requesting IP Addresses or ASNs
IPv6 Information
IPv4 Addressing Options
Autonomous System Numbers
Legacy Resources at ARIN
Fee & Billing Information
Fee Schedule
Premier Support Plan (PSP)
Make a Payment
How Billing Works
Resource Revocation, Returns, and Reinstatement
IP & ASN Registry Services
Managing Resource Records
Transferring IP Addresses & ASNs
Reporting Reassignments
Autonomous System Originations (Origin AS)
Using Whois
Resource Management Services
Automating Record Management with Reg-RWS
Securing DNS (DNSSEC)
Routing Security Eligibility FAQs
Resource Certification (RPKI)
Internet Routing Registry (IRR)
Reverse DNS
Policy & Participation
Policy
Number Resource Policy Manual
Policy Development Process (PDP)
Draft and Recommended Draft Policies
Policy Proposals
Meetings & Events
Public Policy and Members Meetings
Outreach Events
ARIN Fellowship Program
Sponsorship
Past Meetings
Membership & Elections
Membership
Elections
Community Interaction
ARIN Community Satisfaction Surveys
Mailing Lists
Consultations & Suggestions
Reference & Tools
Tools
Operational Test and Evaluation (OT&E) Environment
CIDR Calculator
Community Software Repository
Internet Number Resource Fraud Reporting
Reference
Spam & Network Abuse Reporting
Registry Data Description
Data Accuracy
Information Security at ARIN
ARIN Software Releases
Research
Statistics & Reporting
Historical Whois Data (WhoWas)
Bulk Whois Data
Training & Education
ARIN Leadership Development Program
Instructional Webinars
Resource Materials
ARIN Online Help Videos
About
Welcome to ARIN
Organization Structure & Staff
Our Region
ARIN Board of Trustees
Advisory Council
NRO Number Council
Careers
Corporate Documentation
Corporate Documents
Annual Reports
Strategic Planning & Budgeting
Agreements
History of ARIN
Third-Party Vendors and IPv6
Community Grants
ARIN Community Grant Program
Community Grant Program Recipients
External Relations
Internet Governance
Memberships, Sponsorships, and MOUs
Law Enforcement & Public Safety
Technical Community
Blog
Pay Now
Feedback
ARIN Whois/RDAP
Search
Search www.arin.net instead
Search Filter:
Automatic
all requests subject to
terms of use
Set query type:
Automatic (auto-detect query type)
Entity (e.g. Handle or ID for a Contact, Organization, or POC)
Search Entities by Full Name (use * for wildcards)
Domain (in-addr.arpa or ip6.arpa)
IP Address or CIDR range
ASN (Autonomous System Number or Autnum)
Origin AS
"
121.139.243.170
"
Unknown error has occurred.
No results found.
Related
Report Whois Inaccuracy
Whois/RDAP Documentation
ARIN Technical Discussion Mailing List
FAQs
