Quickly lookup updated information about specific Autonomous System Number (ASN), Organization, CIDR, or registered IP addresses (IPv4 and IPv6) among other relevant data. Free API access available!

Check an Autonomous System Number (ASN) for IP prefixes or lookup an IP address (IPv4 or IPv6) to get details and owner of the AS. To search all ASN's belonging to an organisation, simply enter a text search string.

The range of IP addresses that a given AS has control over is called their "IP address space." Most ASes connect to several other ASes. If an AS connects to only one other AS and shares the same routing policy, it may instead be considered a subnetwork of the first AS.

Free IP to ASN lookup tool to map an IP address to ASN (Autonomous System Number). Find out the ASN of an IPv4 or IPv6 address. For example, the ASN of DigitalOcean looks like this: AS394362 DIGITALOCEAN-ASN-CA1 - DigitalOcean, LLC.

Jun 16, 2023 · What is an ASN? An Autonomous System (AS) is a large network that has a common routing policy used to serve a set of IP prefixes. An AS is assigned to a single organization and is connected to multiple ASes to route IP packets in a redundant manner.

An Autonomous System (AS) is a group of one or more IP prefixes (lists of IP addresses accessible on a network) run by one or more network operators that maintain a single, clearly-defined routing policy.

ASN Lookup tool tells the ASN WHOIS details. Just enter the AS number and find which company is using that ASN and what the origin of that company is. i.e., country, city, latitude, longitude, state, etc. Verifying... The ASN search tool quickly looks up Autonomous System Number (ASN).

Use the IP to ASN mapper tool to lookup an ASN for a given IP prefix. What is an IP to ASN mapping? IP to ASN (Autonomous System Number) mapping is the process of determining the Autonomous System Number (ASN) that is associated with a specific IP address.

An autonomous system (AS) is a collection of connected Internet Protocol (IP) routing prefixes under the control of one or more network operators on behalf of a single administrative entity or domain, that presents a common and clearly defined routing policy to the Internet. [1]

Look up detailed information about Autonomous System Numbers (ASNs) with our ASN Lookup tool. Get ASN details, IP ranges, and more.