2620:3f:8000::/48 - GTA-V6
V6NetHandle: NET6-2620-3F-8000-1 OrgID: GTA-4 Parent: NET6-2620-1 NetName: GTA-V6 NetRange: 2620:3F:8000:: - 2620:3F:8000:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment OriginAS: 23375 RegDate: 2011-05-13 Updated: 2016-11-11 TechHandle: PE18-ARIN AbuseHandle: PE18-ARIN NOCHandle: PE18-ARIN Source: ARIN OrgID: GTA-4 OrgName: Global Technology Associates, Inc. CanAllocate: Street: 5840 Red Bug Lake Road, #555 City: Winter Springs State/Prov: FL Country: US PostalCode: 32708 RegDate: 1994-03-08 Updated: 2018-02-14 OrgAdminHandle: PE18-ARIN OrgTechHandle: PE18-ARIN OrgAbuseHandle: PE18-ARIN OrgNOCHandle: PE18-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.