AS19422 Telefonica Moviles del Uruguay SA
2800:840::/44 - ALM
inetnum: 2800:840::/32 status: allocated owner: Telefonica Moviles del Uruguay SA city: Montevideo country: UY owner-c: ALM tech-c: ALM abuse-c: JOA58 created: 2011-05-09 changed: 2014-02-06 source: LACNIC nic-hdl: JOA58 person: José Acuña e-mail: jose.acuna@TELEFONICA.COM address: Av. José Belloni, 3124, address: 11200 - Montevideo - country: UY phone: +598 95 703423  created: 20130821 changed: 20130821 nic-hdl: ALM person: Alejandro Gonzalez e-mail: alejandro.gonzalez@TELEFONICA.COM address: Av. Jose Belloni 3124, 3124, address: 11200 - Montevideo - Mv country: UY phone: +598 95 703418  created: 20021029 changed: 20180713
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.