2606:6000:4000::/36 - RRMA
V6NetHandle: NET6-2606-6000-1 OrgID: RRMA Parent: NET6-2600-1 NetName: RRMA NetRange: 2606:6000:: - 2606:6000:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation RegDate: 2010-03-05 Updated: 2010-03-05 Source: ARIN OrgID: RRMA 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 residential customers out of the Columbus, OH, Herndon, VA and Raleigh, NC RDCs. RegDate: 1970-01-01 Updated: 2018-03-07 OrgAbuseHandle: ABUSE10-ARIN OrgAdminHandle: IPADD1-ARIN OrgTechHandle: 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.