How To Find My Asn

Bank check an Democratic System Number (ASN) for IP prefixes (subnets) or lookup an IP address (IPv4 or IPv6) to become details of the As.

To search all ASN'south belonging to an organisation, simply enter a text search string.

ASN Query Format

Perform ASN lookups as shown in the examples below. Enter either every bit a single query, a list (IP'south or AS Numbers) or a comma separated listing.

Lookup one of more IP's

Single query or a list
ix.9.9.9
viii.8.eight.8
Comma separated
1.i.1.1,8.viii.four.iv

Lookup one or more AS Numbers

Single query or a listing
AS15169
3333
Comma separated
15169,3333

Search for AS Names

Search single queries but
Example:

TESLA

What is an Autonomous System (AS)

The Internet is made up of Autonomous Systems, these are collections of IP routing prefixes that allow Internet connected systems to communicate with each other. Without this routing the Internet simply would not work.

Utilize this tool to identify the registered owner of an IP range, in that the system owner that contains the IP address. Go on in heed that at that place is no direct correlation between the IP address location from the ASN and geolocation. Many organisations have Autonomous Systems that span continents; if an IP address is found in an Equally based in the United States, this does non necessarily mean the IP address is on a system physically located within the United states of america.

The ASN search tool found here is for quick lookups of an IP address or Autonomous System Number (ASN). Using the Gratis version of the tool has a limit of 50 lookups a twenty-four hour period; this includes use of the other IP Tools that HackerTarget.com has made available.

IPv6 ASN Lookup

An ASN tin can be made upwardly of IPv4 and IPv6 prefixes. Our tool will show all prefixes within the ASN including IPv6 network ranges. Querying an IPv6 accost with the tool will show the ASN that the address belongs to.

When using the ASN search to query a list of IP addresses y'all are able to mix IPv4 and IPv6 addresses within the 1 query.

ASN Bulk Lookup

Non-members can use the form above to enter up to twenty IP addresses or AS numbers to query. Results can exist exported to XLSX for inclusion in your security reports or other tools.

ASN Lookup Limits

	FREE USER	Membership
Queries / mean solar day	50	500 - 20000 # based on plan
Max Query Size	20	12000

With a membership query upwardly to 12000 IP addresses at one time. A gold mine of data for security analysts, network defenders and other cyber security professionals.

To use the API meet the details below, the API is just configured for unmarried queries.

ASN Lookup API

This tool is congenital on a simple API that we have provided to the public. No signup or keys are required, simply query the API and become your results. If yous wish to utilise more than the 50 queries per day quota Remove limits with a Total Membership..

Using the ASN API is a uncomplicated matter of querying the following URL with an IP address, or ASN, appended to the "q" parameter. See below for an example. You can put this URL into a browser, use curl, or a scripting linguistic communication such equally php, python, or cerise to make the HTTP asking. If you are looking up an ASN ensure the format is as shown in the second example.

curl https://api.hackertarget.com/aslookup/?q=i.ane.ane.1
roll https://api.hackertarget.com/aslookup/?q=AS15169

Checking a List

Using the API querying the As of a listing of IP accost is easily achieved with simple scripting.

while read line; do curl https://api.hackertarget.com/aslookup/?q=$line done < ipaddress-listing.txt

Other BGP Resources

If yous require more detail regarding the BGP routing of an Autonomous System, the Shadow Server Projection has an excellent query tool available using DNS or Whois. There is also a Python module available for querying the service.

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