V6NetHandle: NET6-2620-B7-1 OrgID: BIORAD Parent: NET6-2620-1 NetName: NET-BIO-RAD NetRange: 2620:B7:: - 2620:B7:0:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment RegDate: 2011-03-01 Updated: 2013-01-14 TechHandle: IPADM550-ARIN NOCHandle: IPADM550-ARIN AbuseHandle: IPADM550-ARIN Source: ARIN OrgID: BIORAD OrgName: Bio-Rad Laboratories, Inc. CanAllocate: Street: 1000 Alfred Nobel Drive City: Hercules State/Prov: CA Country: US PostalCode: 94547 Comment: https://www.bio-rad.com RegDate: 1992-08-10 Updated: 2014-04-04 OrgAdminHandle: IPADM550-ARIN OrgAbuseHandle: BIORA-ARIN OrgTechHandle: IPADM550-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.