AS19037 AMX Argentina S.A.
2803:7d80::/32 - SAD3
inetnum: 2803:7d80::/32 status: allocated owner: AMX Paraguay SA city: Asuncion country: PY owner-c: SAD3 tech-c: SAD3 abuse-c: SAD3 created: 2014-08-29 changed: 2014-08-29 source: LACNIC nic-hdl: SAD3 person: Gonzalo Giachetti e-mail: ipaddressing.ar@CLARO.COM.AR address: Av. de Mayo, 878, - address: C1084AAQ - Bs.As, - CF country: AR phone: +54 1140011300  created: 20060511 changed: 20190306
IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.
Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.