Logo Windows icon software company Icon CreatorDownload IconBuy IconsContact  
Icon Creator
Icon Software
Download Icon
Buy Icons
Icon Sets

Get Ready Icons

Your name:
Your e-mail:

What Is Autonomous System Number (ASN)?

Autonomous System Number (ASN)

An Autonomous System Number (ASN) is a unique two-byte number associated with an AS. The ASN is used an identifier to allow the AS to exchange dynamic routing information with other Autonomous Systems. Exterior routing protocols such as the Border Gateway Protocol (BGP) requires ASNs to exchange information between networks.

You can download AS to lat/long mapping base from netgeo.caida.org. It contains AS number, organization, city, region, country, iso country code, continent, latitude an longitude.

Autonomous System (AS)

An Autonomous System (AS) is a connected group of one or more IP prefixes run by one or more network operators under a single and clearly defined routing policy.

aut-num object

An aut-num object is an object in the Whois database used to register ASN assignment details. For the purposes of this document, aut-num object also refers to the ASN registration objects in NIR databases.


A multi-homed AS is one which is connected to more than one other AS. An AS also qualifies as multihomed if it is connected to a public Internet Exchange Point.

Routing policy

The routing policy of an AS is a description of how network prefixes are exchanged between that AS and other Autonomous Systems.


Popular Network Tools
Network icon Perfect Network Icons is a collection of distinctive icons that represents all operations and concepts related to networks. The collection is distributed as BMP, PNG, GIF and ICO files. Each icon has three states: normal, disabled, and highlighted.

Networks icon Vista Network Icon Library is a collection of network-related icons. The collection is distributed as BMP, PNG, GIF and ICO files. Each icon has 16x16, 24x24, 32x32, 48x48 and 256x256 versions, as well as variants with and without shadows.

Telecom icon Speed up development of communication products and services and enhance the usability and look of your new project with ready-made Perfect Telecom Icons. This icon library includes icons of symbols and actions that are used in telecommunications.

DB icon High quality icons attract the user's eyes and make the first impression of a program thus playing a key part in building the image of any software and its developer. Have no restraints in choosing an icon of your dream with Database Software Icons.

Security icon Security Icon Set is a collection of stock icons for use in personal and commercial products, including software applications, websites and presentations. The icons have a bright color palette, smooth and well-rounded edges.