inet6num: 2a01,4c8,,/29 netname: UK-TM-20071002 country: GB org: ORG-TIUL1-RIPE admin-c: TMUK-RIPE tech-c: TMUK-RIPE status: ALLOCATED-BY-RIR remarks: REPORT MISUSE TO, email@example.com notify: firstname.lastname@example.org mnt-by: RIPE-NCC-HM-MNT mnt-by: AS12576-MNT mnt-lower: TMUK-MNT mnt-lower: AS12576-MNT mnt-routes: TMUK-MNT mnt-domains: TMUK-MNT created: 2012-08-01T13,12,50Z last-modified: 2016-09-15T16,25,31Z source: RIPE organisation: ORG-TIUL1-RIPE org-name: EE Limited org-type: LIR address: Trident Place, Mosquito Way address: AL10 9BW address: Hatfield address: UNITED KINGDOM phone: +441707315000 fax-no: +441707319030 e-mail: email@example.com admin-c: TMUK-RIPE admin-c: CM9250-RIPE admin-c: SG10538-RIPE admin-c: EE1964-RIPE admin-c: BS44-RIPE abuse-c: EE1964-RIPE ref-nfy: firstname.lastname@example.org ref-nfy: email@example.com mnt-ref: RIPE-NCC-HM-MNT mnt-ref: AS12576-MNT notify: firstname.lastname@example.org notify: email@example.com abuse-mailbox: firstname.lastname@example.org mnt-by: RIPE-NCC-HM-MNT mnt-by: AS12576-MNT created: 2004-04-17T12,22,43Z last-modified: 2016-05-26T08,42,56Z source: RIPE role: T-Mobile UK RIPE Admin address: Hatfield Business Park address: Hatfield address: Hertfordshire, UK address: AL10 9BW abuse-mailbox: email@example.com e-mail: firstname.lastname@example.org admin-c: EE1964-RIPE mnt-by: TMUK-MNT tech-c: EE1964-RIPE tech-c: EE1964-RIPE nic-hdl: TMUK-RIPE created: 2009-07-15T08,59,08Z last-modified: 2015-04-20T13,31,39Z source: RIPE route6: 2a01,4c8,,/29 descr: EE route origin: AS12576 mnt-by: AS12576-mnt created: 2013-01-15T14,44,12Z last-modified: 2013-01-15T14,44,12Z 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.