Autonomous System
[BGP](https://texonom.com/bgp-b507706ab6934511a1633fd6047294ee) 


# AS
하나의 단일 기관 하에서도 동일한 정책으로 관리되는 네트워크와 라우터 그룹
Autonomous systems typically belong to ISPs or other large high-tech organizations


[ASN](https://texonom.com/asn-87c15a6f25ac49a3887481508b3e2f19)


[IANA](https://texonom.com/iana-9f3d57997f34470db49e90a6f2630be2)


[RIRs](https://texonom.com/rirs-178d7b4d89d842dda3f377565a68a2ac)



Each autonomous system have a registered ASN
Internet Assigned Numbers Authority (IANA) assigns ASNs to Regional Internet Registries which then assigns them to ISPs and networks
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





