V6NetHandle: NET6-2001-48F8-1 OrgID: MIDCO-1 Parent: NET6-2001-4800-0 NetName: NET6-2001-48F8-32 NetRange: 2001:48F8:: - 2001:48F8:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation RegDate: 2005-06-30 Updated: 2016-08-01 Source: ARIN OrgID: MIDCO-1 OrgName: Midcontinent Communications CanAllocate: Street: 3901 N Louise Ave City: Sioux Falls State/Prov: SD Country: US PostalCode: 57107 RegDate: 2004-05-13 Updated: 2017-01-28 OrgAdminHandle: MBO122-ARIN OrgAbuseHandle: ABUSE641-ARIN OrgTechHandle: MBO122-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.