AS10507 Sprint Personal Communications Systems
2600:6:ff40::/48 - SPRINT-ANAHEIM-POP
V6NetHandle: NET6-2600-6-FF40-4000-1 OrgID: SAP-50 Parent: NET6-2600-2 NetName: SPRINT-ANAHEIM-POP NetRange: 2600:6:FF40:4000:: - 2600:6:FF40:4FFF:FFFF:FFFF:FFFF:FFFF NetType: reassignment RegDate: 2017-10-13 Updated: 2017-10-13 Source: ARIN OrgID: SAP-50 OrgName: Sprint Anaheim POP CanAllocate: Street: Sprint Anaheim POP City: Anaheim State/Prov: CA Country: US PostalCode: 92801 RegDate: 2013-12-05 Updated: 2013-12-05 OrgAbuseHandle: SIE-ARIN OrgAdminHandle: SIE-ARIN OrgTechHandle: 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.