What an autonomous system is
An autonomous system (AS) is the set of IP networks run by one organisation under a single routing policy. Providers, hosts and large companies announce their networks to the internet over BGP under their own AS number. With the number you can find all of an organisation’s addresses, for example to allow a service through a firewall or to block traffic from a network.
Network and country data come from DB-IP and are refreshed monthly. The country shows where addresses are used, not where the company is registered.