inet6num: 2001,1a28,,/32 netname: DE-E-PLUS-20040202 country: DE org: ORG-EMG1-RIPE admin-c: EAG18-RIPE admin-c: EAG18-RIPE tech-c: JL8-RIPE tech-c: EAG18-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: AS12638-MNT mnt-routes: AS12638-MNT notify: email@example.com created: 2004-02-02T11,04,40Z last-modified: 2017-02-17T09,11,30Z source: RIPE organisation: ORG-EMG1-RIPE org-name: E-Plus Mobilfunk GmbH org-type: LIR phone: +492114484248 fax-no: +49177994484248 admin-c: JL8-RIPE admin-c: JL8-RIPE mnt-ref: EPLUS-DMNT mnt-ref: AS12638-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: AS12638-MNT created: 2004-04-17T11,06,49Z last-modified: 2017-02-17T09,11,32Z source: RIPE abuse-c: AR14561-RIPE address: E-Plus Straße 1 address: 40472 address: Duesseldorf address: GERMANY e-mail: firstname.lastname@example.org role: E-PLUS ADMIN GROUP abuse-mailbox: email@example.com address: Germany 40472 Duesseldorf E-Plus Strasse 1 remarks: legal requests , +491774481122 e-mail: firstname.lastname@example.org admin-c: JL8-RIPE tech-c: JL8-RIPE nic-hdl: EAG18-RIPE mnt-by: AS12638-MNT created: 2010-01-20T16,08,42Z last-modified: 2015-12-10T15,50,28Z source: RIPE person: Joerg Lauwigi address: E-Plus Mobilfunk GmbH & Co. KG address: Abt. ECP address: E-Plus-Platz 1 address: D-40476 Duesseldorf address: Germany phone: +49 211 448 4248 e-mail: email@example.com nic-hdl: JL8-RIPE mnt-by: EPLUS-PMNT created: 1970-01-01T00,00,00Z last-modified: 2004-05-11T06,18,17Z source: RIPE route6: 2001,1a28,,/32 descr: E-plus Mobilfunk GmbH & Co KG origin: AS12638 notify: firstname.lastname@example.org created: 2005-05-10T13,02,30Z last-modified: 2005-05-10T13,02,30Z source: RIPE mnt-by: AS12638-MNT
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.