Extensive Autonomous System Number Lookup

This unique ASN lookup tool allows you to explore Autonomous Systems and look at infrastructures of some of the largest companies in the world.
Complete AS Lookup
Study autonomous systems; use this data to improve the knowledge base and security of your own network
Largest AS Database; Never Dated
We crawl autonomous systems daily, storing data on our servers and keeping it updated. Access AS data anytime
Offline Access
Download AS data in TSV format and access it offline
Who’s Interested in Autonomous System Lookup?
AS lookup tool will get you a full view of autonomous systems and networks within them. Pentesters can analyze possible vulnerabilities and attack surfaces of companies and organizations. Similarly, they can utilize AS lookup to test their own network security
Security Engineers
Easily monitor your organization’s/network’s/company’s infrastructure; using AS number lookup will help you see your company’s attack surface and identify vulnerabilities; AS data is like a napkin, there are a million ways to apply it
Business Analysts
Analysts get the biggest benefit— Our ASN lookup tool provides an under-the-hood look at organizations’ business ties, analytical info on competition and partners allowing analysts to distinguish friend from foe
Keep in mind. Unregistered users can't see all the information about Autonomous Systems
The Benefits of Using Spyse
What are Spyse Credits Is?
The Spyse pricing system runs on credits. They can be purchased and used interchangeably between services. There is no need to individually subscribe to each service, you can take full advantage of all the tools Spyse has to offer. By registering on ASlookup you will receive 3 credits (equal to 300 requests such as searching, filtering, and storing information), and get one complimentary credit per month. We hope this will be enough to test our service thoroughly
How to Explore Autonomous Systems
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1. Search for AS
Enter any query in the search bar; domain name, company name, or IP address.
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2. Obtain Broad AS Data
This data is stored on our serves and updated regularly; access it quickly and sort it using filters.
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3. Download in TSV Format
Feel free to download and use the data at your convenience; it belongs to you.
Enterprise plan
Need more data or custom features? Feel free to contact us
Filtering and pagination will use Credits
This is paid action