AS10507 Sprint Personal Communications Systems
2600:6:ff00::/48 - SPRINT-BUFFALO-POP
V6NetHandle: NET6-2600-6-FF00-1 OrgID: SBP-57 Parent: NET6-2600-2 NetName: SPRINT-BUFFALO-POP NetRange: 2600:6:FF00:: - 2600:6:FF00:FFF:FFFF:FFFF:FFFF:FFFF NetType: reassignment RegDate: 2017-10-16 Updated: 2017-10-16 Source: ARIN OrgID: SBP-57 OrgName: Sprint Buffalo POP CanAllocate: Street: Sprint Buffalo POP City: Buffalo State/Prov: NY Country: US PostalCode: 14206 RegDate: 2013-12-05 Updated: 2013-12-05 OrgAdminHandle: SIE-ARIN OrgTechHandle: SIE-ARIN OrgAbuseHandle: 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.