inet6num: 2a00,aea0,112,,/48 netname: EU-VIP-ISP2 descr: EU-VIP-ISP2 country: CZ admin-c: BDA-RIPE tech-c: BDA-RIPE status: ASSIGNED mnt-by: MNT-B created: 2015-09-22T14,03,51Z last-modified: 2015-09-22T14,03,51Z source: RIPE role: BDA-RIPE address: United Kingdom e-mail: firstname.lastname@example.org e-mail: email@example.com admin-c: AKR75-RIPE tech-c: AKR75-RIPE tech-c: MOLL-RIPE abuse-mailbox: firstname.lastname@example.org notify: email@example.com nic-hdl: BDA-RIPE mnt-by: MNT-GREY created: 2011-05-25T14,54,27Z last-modified: 2015-02-20T14,30,16Z source: RIPE route6: 2a00,aea0,112,,/48 descr: EU-VIP-ISP2 origin: AS12678 mnt-by: MNT-GREY created: 2015-09-22T14,08,23Z last-modified: 2015-09-22T14,08,23Z source: RIPE
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.