2a03:6400:28::/47 - EU-LIVEPERSON-20110113
inet6num: 2a03,6400,,/32 netname: EU-LIVEPERSON-20110113 country: GB org: ORG-LI19-RIPE admin-c: LS2755-RIPE tech-c: LS2755-RIPE status: ALLOCATED-BY-RIR notify: firstname.lastname@example.org mnt-by: RIPE-NCC-HM-MNT mnt-by: MNT-NISN1 mnt-lower: LS1-MNT mnt-lower: MNT-NISN1 mnt-routes: LS1-MNT created: 2011-01-13T12,33,00Z last-modified: 2016-09-15T16,24,19Z source: RIPE organisation: ORG-LI19-RIPE org-name: LivePerson, Inc org-type: LIR address: 462 7th Avenue, 3rd Floor address: 10018 address: NY address: UNITED STATES phone: +972747004461 fax-no: +972747004900 e-mail: email@example.com admin-c: NISN1-RIPE tech-c: NISN1-RIPE abuse-c: LAH13-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: MNT-NISN1 abuse-mailbox: firstname.lastname@example.org mnt-by: RIPE-NCC-HM-MNT mnt-by: MNT-NISN1 created: 2010-05-17T08,33,10Z last-modified: 2016-07-17T13,45,09Z source: RIPE person: Liad Shiri address: 3 HaTidhar St., P.O. Box 2067, Industrial Area, Ra?anana, 43100, Israel. phone: +972-54-2669618 nic-hdl: LS2755-RIPE created: 2010-05-18T07,03,33Z last-modified: 2016-04-06T19,01,37Z mnt-by: RIPE-NCC-LOCKED-MNT 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.