Seonglae ChoAS
Autonomous systems typically belong to ISPs or other large high-tech organizations
ASNs are 16 bit numbers between 1 and 65534 and 32 bit numbers between 131072 and 4294967294. As of 2018, there are approximately 64,000 ASNs in-use worldwide. These ASNs are only required for external BGP
Autonomous System Notion
Autonomous system (Internet)
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] Each AS is assigned an autonomous system number (ASN), for use in Border Gateway Protocol (BGP) routing. Autonomous System Numbers are assigned to Local Internet Registries (LIRs) and end user organizations by their respective Regional Internet Registries (RIRs), which in turn receive blocks of ASNs for reassignment from the Internet Assigned Numbers Authority (IANA). The IANA also maintains a registry of ASNs which are reserved for private use (and should therefore not be announced to the global Internet).
https://en.wikipedia.org/wiki/Autonomous_system_(Internet)
What is an autonomous system? | What are ASNs? | Cloudflare
What does 'ASN' stand for? Find out what an autonomous system (AS) is, what an autonomous system number is, and how BGP & ASNs are related.
https://www.cloudflare.com/learning/network-layer/what-is-an-autonomous-system/
