188.8.131.52/21 - MEDCO
NetHandle: NET-167-211-0-0-1 OrgID: MHS-77 Parent: NET-167-0-0-0-0 NetName: MEDCO NetRange: 184.108.40.206 - 220.127.116.11 NetType: assignment RegDate: 1993-10-05 Updated: 2012-03-20 Source: ARIN OrgID: MHS-77 OrgName: Medco Health Solutions, Inc CanAllocate: Street: 100 Parsons Pond Drive Street: Network Services City: Franklin Lakes State/Prov: NJ Country: US PostalCode: 07417 RegDate: 2005-07-29 Updated: 2011-09-24 OrgTechHandle: IIG1-ARIN OrgAdminHandle: MAB33-ARIN OrgAbuseHandle: IIG1-ARIN Source: ARIN
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.