V6NetHandle: NET6-2607-F558-1 OrgID: SDBR Parent: NET6-2600-1 NetName: SOUTH-DAKOTA-RESEARCH-AND-EDUCATION-NETWORK NetRange: 2607:F558:: - 2607:F558:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation RegDate: 2008-06-24 Updated: 2012-03-02 TechHandle: DTI10-ARIN TechHandle: CJM8-ARIN Source: ARIN OrgID: SDBR OrgName: South Dakota Board of Regents CanAllocate: Street: USD 414 E Clark City: Vermillion State/Prov: SD Country: US PostalCode: 57069 RegDate: 1996-09-29 Updated: 2013-04-01 OrgAdminHandle: CGA27-ARIN OrgAbuseHandle: CGA27-ARIN OrgAbuseHandle: DTI10-ARIN OrgTechHandle: DTI10-ARIN OrgTechHandle: CGA27-ARIN OrgAbuseHandle: SB164-ARIN OrgTechHandle: SB164-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.