AS18480 General Datatech, LP
2620:b2::/48 - GDT-IPV6
V6NetHandle: NET6-2620-B2-1 OrgID: GDL-18 Parent: NET6-2620-1 NetName: GDT-IPV6 NetRange: 2620:B2:: - 2620:B2:0:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment RegDate: 2012-11-26 Updated: 2012-11-26 Source: ARIN OrgID: GDL-18 OrgName: General Datatech, LP CanAllocate: Street: 999 Metromedia Place City: Dallas State/Prov: TX Country: US PostalCode: 75247 RegDate: 2012-09-27 Updated: 2019-02-07 OrgTechHandle: MCCRE9-ARIN OrgTechHandle: MCCLU213-ARIN OrgTechHandle: IPENG31-ARIN OrgNOCHandle: MCCLU213-ARIN OrgNOCHandle: IPENG31-ARIN OrgAdminHandle: IPENG31-ARIN OrgAbuseHandle: MCCLU213-ARIN OrgAbuseHandle: IPENG31-ARIN Source: ARIN POCHandle: IPENG31-ARIN IsRole: Y LastName: IP Engineering FirstName: Street: 999 Metromedia Place City: Dallas State/Prov: TX Country: US PostalCode: 75247 RegDate: 2014-11-14 Updated: 2018-09-18 OfficePhone: +1-214-857-6100 Mailbox: firstname.lastname@example.org 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.