AS5696 Express Scripts Incorporated
184.108.40.206/20 - EXPRES-167-18
NetHandle: NET-167-18-0-0-1 OrgID: EXPRES Parent: NET-167-0-0-0-0 NetName: EXPRES-167-18 NetRange: 220.127.116.11 - 18.104.22.168 NetType: assignment RegDate: 1993-04-15 Updated: 2012-03-02 Source: ARIN OrgID: EXPRES OrgName: Express Scripts Incorporated CanAllocate: Street: One Express Way City: St. Louis State/Prov: MO Country: US PostalCode: 63121 RegDate: 1994-06-01 Updated: 2011-06-10 OrgNOCHandle: DATAC1-ARIN OrgTechHandle: DATAC1-ARIN OrgAdminHandle: DATAC1-ARIN OrgAbuseHandle: DATAC1-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.