Comment by _-david-_

ASN is an Autonomous System Number. An ISP is the primary example of an Autonomous System. There are other organizations that have ASNs like data centers.

The internet is decentralized. Basically, each autonomous system is its own network. This means that they need to connect with one another in order to allow traffic between each other. This is called peering. In order to peer with another network you must have an ASN.

The number doesn't matter.