|Lookup Autonomous System Number (ASN) details by providing an IP address or ASN using our ASN database. The internet consists of a large number of Autonomous Systems (ASes). Each AS is made up of one or more IP networks managed by a single entity and shares a unified routing policy to connect to the rest of the internet. ASNs play an important role in network infrastructure by uniquely identifying each AS. Understanding network details has become crucial for ISPs, security professionals, network operators and other businesses to take data-driven decisions and secure their network.
The ASN database allows you to have comprehensive and detailed network insights about the ASN of any organization or any provided IP Address owned by a particular Autonomous System. It offers vital information including ASN owner organization, its registered country, domain, date allocated, and routes owned by that organization. Get a clearer understanding of global network routing by examining routing information like peering relationships, transit providers (upstreams), and client networks (downstreams).
Quickly determine the autonomous system and managing organization associated with a specific IP for enhanced security or business operations.
Strengthen security analyses by linking malicious activity with ASN ownership and related IP ranges.
Use ASN data to understand traffic origins and destinations to design more efficient networks and better traffic flow.
Study the peering relationships between Internet Service Providers (ISPs) by examining their connected ASNs to understand traffic exchange points.
Analyze routing policies and network connectivity by studying upstream and downstream ASN relationships.
Visualize ASN interconnections to identify critical internet pathways and understand the overall structure of internet routing.
Identify ASN allocations and IP address spaces used by particular organizations or industries.
| Field | Type | Description | Can be empty? |
|---|---|---|---|
| start_ip | string | The start_ip represents the beginning IP address of the range. | No |
| end_ip | string | The end_ip represents the ending IP address of the range. | No |
| as_number | string | The as_number is the Autonomous System Number associated with the IP range. | No |
| as_name | string | The as_name is the name of the Autonomous System. | Yes |
| as_org_name | string | The as_org_name is the name of the organization that owns the Autonomous System. | Yes |
| routes | string | The routes field contains the IP routes announced by the Autonomous System. | Yes |
| country | string | The country field indicates the country where the Autonomous System is registered. | No |
| domain | string | The domain field contains the domain associated with the Autonomous System. | Yes |
| allocation_status | string | The allocation_status indicates whether the IP range is allocated, reserved, or unallocated. | No |
| whois_host | string | The whois_host is the hostname of the WHOIS server that provides information about the Autonomous System. | Yes |
| whois_response | string | The whois_response contains the raw WHOIS response for the Autonomous System. | Yes |
| peers | string | The peers field lists other Autonomous Systems that have peering relationships with this AS. | Yes |
| upstreams | string | The upstreams field lists upstream providers that this AS relies on for internet connectivity. | Yes |
| downstreams | string | The downstreams field lists client networks that are connected to this AS. | Yes |
| num_of_ipv4_routes | number | The number of IPv4 routes announced by the Autonomous System. | No |
| num_of_ipv6_routes | number | The number of IPv6 routes announced by the Autonomous System. | No |
| date_allocated | string | The date when the Autonomous System was allocated. | Yes |
| Filesize | 4.5 MB |
|---|---|
| Fields | 17 |
| Last Updated | Yesterday |
| Entries | 633.5K |
| Filesize | 137 MB |
|---|---|
| Fields | 17 |
| Last Updated | Yesterday |
| Entries | 633.5K |
This database is ideal for businesses and network engineers that need detailed insights into IP ownership, routing, and network structure. Use it to identify AS numbers, organization names, peer relationships, upstream/downstream connections, and route announcements. It’s valuable for optimizing network performance, detecting routing anomalies, and enhancing BGP security. By understanding how IPs are routed and which networks they belong to, you can make smarter infrastructure decisions, improve connectivity, and power data-driven analysis across your systems.
We support custom formats and structures upon request.Contact us to discuss your specific needs.
A solid understanding of ASN information is necessary to understand the internet infrastructure thoroughly. It supports close observation of IP addresses, assists in setting up routes using BGP and helps in identifying the entities responsible for controlling the network and allocating addresses. This information is necessary for security experts, network managers and researchers working on the internet. The use of accurate autonomous system number info helps improve decision making on the internet and strengthens its overall security.
An ASN is a globally unique identifier assigned to an autonomous system, a network or group of networks under a single organization's management that has a defined routing policy.
Yes, you can perform an ASN lookup for any IP address using our service. It provides details such as the associated ASN, the organization that owns it, and the IP ranges linked to that address.
Yes, we offer an ASN Lookup API providing detailed information such as the ASN number, organization name, IP ranges, routing data, peers, upstreams, downstreams, domain, allocation status, and WHOIS response.
We update our ASN dataset on a daily basis, collecting data from reliable sources to ensure accuracy and reliability.
Autonomous Systems use BGP to advertise IP prefixes and exchange routing information between routers, peers, upstreams, and downstreams. This enables efficient connections and data flow across interconnected networks and the global internet infrastructure.
Our database includes the ASN number, associated organization's name, country of registration, announced IP routes, domain, peering details, and allocation status.
Yes, we offer a free ASN lookup tool that allows you to perform lookups with a limited number of requests. It's perfect for basic queries and getting started with ASN insights.
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