autonomous system number (ASN) IP
Autonomous system (Internet) - What is an autonomous system?

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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.

the definition required control by a single entity, typically an Internet service provider (ISP) or a very large organization with independent connections to multiple networks, that adhered to a single and clearly defined routing policy.