2600:5c00::/36 - RCWE
V6NetHandle: NET6-2600-5C00-1 OrgID: RCWE Parent: NET6-2600-1 NetName: RCWE NetRange: 2600:5C00:: - 2600:5C01:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 11955, 20001 RegDate: 2011-09-12 Updated: 2011-09-12 Source: ARIN OrgID: RCWE OrgName: Time Warner Cable Internet LLC CanAllocate: Street: 6399 S Fiddlers Green Circle City: Greenwood Village State/Prov: CO Country: US PostalCode: 80111 Comment: Allocations for this OrgID serve Road Runner commercial customers out of the Honolulu, HI, Kansas City, KS, Orange, CA and San Diego, CA RDCs. RegDate: 2001-09-26 Updated: 2018-03-07 OrgAbuseHandle: ABUSE10-ARIN OrgTechHandle: IPADD1-ARIN OrgAdminHandle: IPADD1-ARIN Source: ARIN
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.