inetnum: 2001:13f0::/32 status: allocated aut-num: N/A owner: ALTICE DOMINICANA S.A. ownerid: DO-ORDO-LACNIC responsible: Michael Alvarez address: Av. Nunez de Caceres, Torre Altice, 8, - address: 10111 - Santo Domingo - Distrito Nacional country: DO phone: +1 8098591419  owner-c: MAM487 tech-c: MAM487 abuse-c: LAF44 created: 20051012 changed: 20180117 nic-hdl: LAF44 person: Layi Felix e-mail: ip@ORANGE.COM.DO address: Nunez de caceres, 8, Torre Orange address: - Santo Domingo - Distrito Nacional country: DO phone: +1809 8098098451283  created: 20170824 changed: 20171113 nic-hdl: MAM487 person: Michael Alvarez Martinez e-mail: malvarez@ALTICE.COM.DO address: 3era, 5, address: - Santo Domingo - country: DO phone: +1809 8591419  created: 20180117 changed: 20180117
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.