AS3549 Level 3 Parent, LLC
2001:13f8:70d0::/44 - MAG35
inetnum: 2001:13f8::/32 status: allocated owner: Red Nacional Académica de Tecnología Avanzada - RENATA city: Bogotá country: CO owner-c: MAG35 tech-c: AED abuse-c: AED created: 2008-09-10 changed: 2011-02-16 source: LACNIC nic-hdl: AED person: Andres Ernesto Salinas Duarte e-mail: asalinas@RENATA.EDU.CO address: Cr7b Bis No 132-28, 00000, address: 00000 - Bogota - country: CO phone: +57 1 6258480  created: 20080609 changed: 20080609
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.