inetnum: 188.8.131.52 - 184.108.40.206 netname: RSA-INSURANCE-GROUP-PLC descr: RSA INSURANCE GROUP PLC country: GB admin-c: IA4279-RIPE tech-c: IA4279-RIPE org: ORG-RIGP1-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: CW-EUROPE-GSOC created: 2007-05-10T10,33,44Z last-modified: 2017-03-08T09,30,51Z sponsoring-org: ORG-VI6-RIPE source: RIPE organisation: ORG-RIGP1-RIPE org-name: RSA INSURANCE GROUP PLC org-type: OTHER address: 20 Fenchurch Street address: London address: EC3M 3AU address: GB e-mail: email@example.com admin-c: IA4279-RIPE tech-c: IA4279-RIPE abuse-c: AR32218-RIPE mnt-ref: CW-EUROPE-GSOC mnt-by: CW-EUROPE-GSOC created: 2017-01-24T10,14,08Z last-modified: 2017-01-25T09,48,04Z source: RIPE role: Infrastructure Architect address: RSA Insurance Group PLC address: 20 Fenchurch Street address: London address: EC3M 3AU address: GB e-mail: firstname.lastname@example.org phone: +44 1403 232323 admin-c: SH13812-RIPE tech-c: SH13812-RIPE nic-hdl: IA4279-RIPE mnt-by: CW-EUROPE-GSOC created: 2017-01-24T10,12,24Z last-modified: 2017-01-24T10,12,24Z source: RIPE route: 220.127.116.11/24 descr: RSA Insurance Group PLC origin: AS1273 mnt-by: CW-EUROPE-GSOC created: 2017-03-08T09,59,07Z last-modified: 2017-03-08T09,59,07Z source: RIPE
IP Addresses in this 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.