V6NetHandle: NET6-2001-468-C00-1 OrgID: UNIVER-262 Parent: NET6-2001-468-1 NetName: ABILENE-MAX-V6 NetRange: 2001:468:C00:: - 2001:468:CFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: reallocation RegDate: 2005-03-02 Updated: 2005-03-02 TechHandle: TN32-ARIN Source: ARIN OrgID: UNIVER-262 OrgName: University of Maryland CanAllocate: Street: Office of Information Technology Street: Patuxent Building City: College Park State/Prov: MD Country: US PostalCode: 20742 RegDate: 1970-01-01 Updated: 2017-07-07 OrgAdminHandle: UM-ORG-ARIN OrgAbuseHandle: UARA-ARIN OrgTechHandle: UM-ORG-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.