ASN Lookup

ASN WHOIS Lookup tool helps you to find details about an Autonomous System Number (ASN). With this ASN checker, you can view AS name, related organization, registry, country, and more.

Result For:

AS Name	Organisation	Registry	Country	Created Date	Updated Date

ASN Contacts

Name	Type	Handle	Phone	Email

ASN WHOIS Lookup

Our ASN checker retrieves available registry and WHOIS data for a valid ASN. It performs an ASN lookup and shows the AS name, related organization, registry, and country.

Our ASN number lookup tool also provides abuse contact details and the last update date, depending on the available registry data. ASN is used to identify an autonomous system used for Internet routing. For example, AS15169 is linked to Google LLC.

How to Use Our ASN Lookup Tool?

You can run an Autonomous System Number lookup using our tool by following these steps.

Step 1: Enter the ASN you want to check in the input box.
Step 2: Click the Lookup ASN button to start the search.
Step 3: The tool will show you the ASN details.

The results shown by our tool include both an organized table and raw WHOIS ASN data. You can copy the results as text and also download them as a plain text (.TXT) file.

What Can You Find With Our ASN Whois Lookup Tool?

Our AS number lookup tool shows several details about the ASN you enter.

Result	What It Means
AS Name	Name linked to the provided ASN
Organization	Organization linked to the ASN
Registry	The registry that manages the ASN record
Country	Country linked to the ASN record
Created Date	This is the date when the ASN record was created
Updated Date	Date when the ASN record was last updated
Contacts	Available technical, abuse, and other contact details
Raw Data	The detailed WHOIS information for the inputted ASN

Common Uses of AS Lookup

AS lookup can help you find and check network information. Common uses include:

Finding Network Ownership: See the organization or network operator linked to an ASN.
Checking Network Details: View basic information about an internet network.
Finding contact details: Check available technical and abuse contacts.
Checking the Registry: See which registry manages the ASN record.
Network Research: Review network and contact information during network checks.
WHOIS Research: View the detailed registry data linked to an ASN.

What is an ASN Number?

An ASN (Autonomous System Number) is a unique number that helps identify a network or a group of networks on the internet. Large internet networks need a way to identify themselves when they exchange routing information.

AS Number Example

An ASN provides a network’s identity that usually appears with the letters AS followed by a number. For example: AS15169.

Each ASN links to a network and its registered organization. You can use our ASN checker to check the public information linked to that number.

Who Assigns Autonomous System Numbers?

The Internet Assigned Numbers Authority (IANA) manages the global pool of Autonomous System Numbers (ASNs). It assigns large ASN blocks to Regional Internet Registries (RIRs). There are five different RIRs that manage and assign ASN numbers to network providers in their respective regions.

ARIN (American Registry for Internet Numbers): It covers Canada, United States, Antarctica, and numerous Caribbean and North Atlantic islands.
RIPE NCC (Reseaux IP Europeens Network Coordination Centre): It serves in Europe, the Middle East, Russia, and parts of Central Asia.
APNIC (Asia Pacific Network Information Centre): It provides services in Asia Pacific region like East, South, and Southeast Asia, as well as Oceania.
LACNIC (Latin America and Caribbean Network Information Centre): Latin America and parts of the Caribbean.
AFRINIC (African Network Information Centre): It covers the entire African continent and parts of the Indian Ocean region.

These registries assign ASNs to network operators such as Internet service providers, enterprises, and other organizations that operate autonomous systems.

Frequently Asked Questions

What is my ASN number?

Your ASN is the number that identifies your autonomous system operated by a network organization. You can find it from your ISP or network provider. You can also use an ASN lookup tool if you already know the ASN and want to check its details.

What is the Difference between ASN WHOIS and IP WHOIS?

ASN WHOIS shows information about an Autonomous System, such as its organization, registry, country, and contacts. IP WHOIS shows registration details for a specific IP address, such as the organization that holds the IP range.

Can I look up all IP Prefixes Belonging to an ASN?

Yes, you can check the IP prefixes linked to an ASN through network or routing databases. However, this Autonomous System lookup tool mainly shows ASN registration and WHOIS details. It does not list every IP prefix linked to the ASN.

How to Find ASN of IP Address?

You can use an IP lookup tool to find the ASN number linked to an Internet Protocol address. Open the IP address lookup tool, enter the IP, and it shows the associated ASN along with other network information if data is available.