inet6num: 2a01,5b40,,/48 netname: NO-DOMENESHOP descr: Domeneshop AS country: NO admin-c: SS19786-RIPE tech-c: HH2777-RIPE status: ASSIGNED mnt-by: DOMENESHOP-MNT mnt-routes: DOMENESHOP-MNT created: 2015-05-28T08,02,08Z notify: email@example.com last-modified: 2015-05-28T08,40,12Z source: RIPE role: Domeneshop Hostmaster address: Domeneshop AS address: Christian Krohgs gate 16 address: 0186 Oslo address: Norway phone: +47 22 94 33 33 fax-no: +47 22 94 33 34 e-mail: firstname.lastname@example.org abuse-mailbox: email@example.com admin-c: SS19786-RIPE tech-c: SS19786-RIPE nic-hdl: HH2777-RIPE mnt-by: DOMENESHOP-MNT notify: firstname.lastname@example.org created: 1970-01-01T00,00,00Z last-modified: 2013-04-19T13,31,31Z source: RIPE person: Stale Schumacher address: Domeneshop AS address: Christian Krohgs gate 16 address: 0186 Oslo address: Norway phone: +47 900 86 393 fax-no: +47 22 94 33 34 e-mail: email@example.com nic-hdl: SS19786-RIPE mnt-by: DOMENESHOP-MNT created: 2012-06-07T12,47,02Z last-modified: 2013-04-19T13,32,00Z source: RIPE route6: 2a01,5b40,,/48 descr: DOMENESHOP origin: AS12996 mnt-by: AS12996-MNT mnt-by: DOMENESHOP-MNT created: 2016-10-26T10,55,38Z last-modified: 2016-10-26T10,55,38Z 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.