AS3549 Level 3 Parent, LLC
2801:1d0:1::/48 - EIA6
inetnum: 2801:1d0::/44 status: assigned owner: Universidad EIA city: Envigado country: CO owner-c: EIA6 tech-c: EIA6 abuse-c: EIA6 inetrev: 2801:1d0:1::/48 nserver: NS1.EIA.EDU.CO nserver: NS2.EIA.EDU.CO nserver: NS3.EIA.EDU.CO inetrev: 2801:1d0:2::/48 nserver: NS1.EIA.EDU.CO nserver: NS2.EIA.EDU.CO nserver: NS3.EIA.EDU.CO created: 2013-09-19 changed: 2013-09-19 source: LACNIC nic-hdl: EIA6 person: Universidad EIA e-mail: john.cadavid@EIA.EDU.CO address: Km 2 + 200 Variante Aeropuerto José María Córdova, , address: - Envigado - country: CO phone: +57 4 3549090  created: 20130613 changed: 20160309
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.