AS18678 INTERNEXA S.A. E.S.P
2800:310:300::/40 - HEJ
inetnum: 2800:310::/32 status: allocated owner: INTERNEXA S.A. E.S.P city: Medellin country: CO owner-c: HEJ tech-c: HEJ abuse-c: NOI10 created: 2009-02-02 changed: 2019-04-24 source: LACNIC nic-hdl: NOI10 person: NOC INTERNEXA e-mail: noc@INTERNEXA.COM address: Calle 12 sur # 18-168, 00, Bloque 5 Piso 2 address: 050022 - Medellin - Antioquia country: CO phone: +57 43157000  created: 20190424 changed: 20190424 nic-hdl: HEJ person: Administrador IP-ITX e-mail: adminred@INTERNEXA.COM address: Cl 12 sur # 18 - 168 bloque 5 Piso 2, 00, 00000 address: 00000 - Medellin - CO country: CO phone: +57 43171111  created: 20090515 changed: 20170116
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.