NetHandle: NET-206-11-112-0-1 OrgID: EXPRES Parent: NET-206-8-0-0-1 NetName: ESI-2 NetRange: 220.127.116.11 - 18.104.22.168 NetType: reassignment OriginAS: 5006 RegDate: 2009-02-23 Updated: 2011-06-10 NOCHandle: DATAC1-ARIN TechHandle: DATAC1-ARIN AbuseHandle: DATAC1-ARIN 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 OrgTechHandle: DATAC1-ARIN OrgAbuseHandle: DATAC1-ARIN OrgNOCHandle: DATAC1-ARIN OrgAdminHandle: DATAC1-ARIN Source: ARIN
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.