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IP & Network Tools

ASN Lookup

Find the autonomous system number and network operator associated with a public IP address.

Free browser toolNetwork-assistedNo sign-up

IP & Network Tools

ASN Lookup

Find the autonomous system number and network operator associated with a public IP address.

This live lookup sends only the IP address or hostname you enter to the named public lookup service. Do not submit private hostnames or confidential infrastructure details.

About the ASN Lookup

ASN Lookup is a focused network utility for administrators, developers, support teams and people troubleshooting an internet connection. Find the autonomous system number and network operator associated with a public IP address.

Live results use a public lookup service. Only the address or hostname submitted for lookup is sent to that service.

Results describe public network information and should not be treated as proof of a person's identity or exact physical location.

Key features

  • ASN identification
  • ISP and organization name
  • IPv4 and IPv6 input

How to use

  1. 1Enter a public IP address.
  2. 2Select Look up.
  3. 3Review its ASN and associated network organization.

Examples

ASN Lookup example
Input: 1.1.1.1
Output: ASN and operator details

One ASN can announce many different IP ranges.

Frequently asked questions

Is this tool free?
Yes. It requires no account, payment or software installation.
Are IP location results exact?
No. IP geolocation is approximate and usually identifies a network region, not a home, person or precise device location.
Does this tool expose private network data?
Only the public IP address or hostname you deliberately submit is sent to the public lookup provider shown in the tool.
Can I use it on mobile?
Yes. Inputs, tables and results adapt to phones, tablets and desktop browsers.

Continue your workflow

Open a related tool to prepare your files or refine the finished result.