What Does Autonomous System Number (ASN) Mean?

An autonomous system number (ASN) is something that businesses or other parties have to get from internet domain registrars, in order to set up internal network systems that interface with other networks over the Internet.

Techopedia Explains Autonomous System Number (ASN)

Here’s how this typically works — a business sets up a phone or data and voice network with various workstations or individual nodes. Maybe each of these is for an individual person in an office where many people work together.