18.104.22.168/21 - ESPN
NetHandle: NET-45-63-128-0-1 OrgID: ESPN Parent: NET-45-0-0-0-0 NetName: ESPN NetRange: 22.214.171.124 - 126.96.36.199 NetType: assignment OriginAS: 4549 RegDate: 2015-01-08 Updated: 2015-01-08 Source: ARIN OrgID: ESPN OrgName: ESPN, Inc. CanAllocate: Street: 1 ESPN Plaza City: Bristol State/Prov: CT Country: US PostalCode: 06010 RegDate: 1992-09-25 Updated: 2014-12-28 OrgAdminHandle: SECAD-ARIN OrgAbuseHandle: SAWOP-ARIN OrgTechHandle: SAWOP-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.