AS10507 Sprint Personal Communications Systems
2600:6:ff83::/48 - SPRINT-NASHVILLE-POP
V6NetHandle: NET6-2600-6-FF83-D000-1 OrgID: SNP-7 Parent: NET6-2600-2 NetName: SPRINT-NASHVILLE-POP NetRange: 2600:6:FF83:D000:: - 2600:6:FF83:DFFF:FFFF:FFFF:FFFF:FFFF NetType: reassignment RegDate: 2017-10-18 Updated: 2017-10-18 Source: ARIN OrgID: SNP-7 OrgName: Sprint Nashville POP CanAllocate: Street: Sprint Nashville POP City: Nashville State/Prov: TN Country: US PostalCode: 37210 RegDate: 2013-12-05 Updated: 2013-12-05 OrgTechHandle: SIE-ARIN OrgAbuseHandle: SIE-ARIN OrgAdminHandle: SIE-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.