2607:4e00::/32 - GRUNET
V6NetHandle: NET6-2607-4E00-1 OrgID: GRU Parent: NET6-2600-1 NetName: GRUNET NetRange: 2607:4E00:: - 2607:4E00:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 10674 RegDate: 2011-03-01 Updated: 2012-03-20 Source: ARIN OrgID: GRU OrgName: Gainesville Regional Utilities CanAllocate: Street: 301 SE 4th Ave City: Gainesville State/Prov: FL Country: US PostalCode: 32601 Comment: All Abuse complaints must be submitted to Abuse Comment: POC, otherwise they will be ignored. RegDate: 1998-07-27 Updated: 2018-05-10 OrgAbuseHandle: ABUSE1557-ARIN OrgTechHandle: YOUNG134-ARIN OrgTechHandle: LINDA2-ARIN OrgAdminHandle: KER14-ARIN OrgTechHandle: KER14-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.