2620:0:2b80::/44 - IDAHO-NATIONAL-LABORATORY
V6NetHandle: NET6-2620-2B80-1 OrgID: INL-12 Parent: NET6-2620-1 NetName: IDAHO-NATIONAL-LABORATORY NetRange: 2620:0:2B80:: - 2620:0:2B8F:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment OriginAS: 10702, 14702 RegDate: 2009-09-23 Updated: 2012-02-24 TechHandle: KMW3-ARIN NOCHandle: PLM2-ARIN AbuseHandle: KMW3-ARIN Source: ARIN OrgID: INL-12 OrgName: Idaho National Laboratory CanAllocate: Street: 2525 Fremont Ave Street: Mail Stop 2604 City: Idaho Falls State/Prov: ID Country: US PostalCode: 83415 RegDate: 2005-05-10 Updated: 2011-09-24 OrgTechHandle: KMW3-ARIN OrgAdminHandle: PLM2-ARIN OrgAbuseHandle: KMW3-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.