188.8.131.52/20 - UK-O2UK-20030814
inetnum: 184.108.40.206 - 220.127.116.11 org: ORG-TOUL2-RIPE netname: UK-O2UK-20030814 country: GB admin-c: OUIS1-RIPE tech-c: OUIS1-RIPE status: ALLOCATED PA mnt-by: RIPE-NCC-HM-MNT mnt-by: O2UK-MNT mnt-domains: O2UK-MNT mnt-routes: O2UK-MNT notify: firstname.lastname@example.org notify: RIPE-o2GERMANY@o2.com created: 2003-08-14T15,08,36Z last-modified: 2017-01-04T17,28,04Z source: RIPE organisation: ORG-TOUL2-RIPE org-name: Telefonica UK Limited org-type: LIR address: 260 Bath Road address: SL1 4DX address: Slough, Berks address: UNITED KINGDOM phone: +44 1753 206403 e-mail: email@example.com mnt-ref: O2UK-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: O2UK-MNT abuse-c: OUIS1-RIPE created: 2009-04-16T07,15,49Z last-modified: 2017-01-26T14,43,48Z source: RIPE role: O2 UK IP Space Management address: GC address: Desk 1ER297a address: Telefonica UK address: 260 Bath Road address: Slough address: Berkshire address: UK address: SL1 4DX mnt-by: O2UK-MNT abuse-mailbox: firstname.lastname@example.org e-mail: email@example.com admin-c: GC244-RIPE tech-c: GC244-RIPE nic-hdl: OUIS1-RIPE created: 2009-07-09T16,27,15Z last-modified: 2017-01-09T15,52,00Z source: RIPE route: 18.104.22.168/17 descr: O2 Online (UK) origin: AS29180 mnt-by: o2uk-mnt created: 2012-04-26T12,52,41Z last-modified: 2012-04-26T12,52,41Z source: RIPE
IP address subranges within this IP range
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.