AS3549 Level 3 Parent, LLC
2803:f840::/32 - FRR40
inetnum: 2803:f840::/32 status: allocated owner: PLAZA RED SOLUCIONES INTEGRALES SAS city: Valle del Cauca country: CO owner-c: FRR40 tech-c: FRR40 abuse-c: FRR40 inetrev: 2803:f840::/32 nserver: VM1.PLAZARED.COM nserver: VM2.PLAZARED.COM created: 2015-05-20 changed: 2015-05-20 source: LACNIC nic-hdl: FRR40 person: Francisco Reyes e-mail: info@PLAZARED.NET address: calle 7, 3, 36 address: 763510 - ginebra - va country: CO phone: +57 3104533646  created: 20150420 changed: 20170418
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.