V6NetHandle: NET6-2001-18C8-200-1 OrgID: TMPL-4 Parent: NET6-2001-18C8-1 NetName: TEAM-CDF--2001-18C8-0200--40 NetRange: 2001:18C8:200:: - 2001:18C8:2FF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: reallocation OriginAS: 10464 RegDate: 2012-04-16 Updated: 2012-04-16 Source: ARIN OrgID: TMPL-4 OrgName: TEAM Madison Partners, LLC. CanAllocate: Street: 1205 Technology Pwky City: Cedar Falls State/Prov: IA Country: US PostalCode: 50613 RegDate: 2012-03-06 Updated: 2012-03-06 OrgAdminHandle: SN721-ARIN OrgTechHandle: SN721-ARIN OrgAbuseHandle: TTA30-ARIN OrgNOCHandle: SN721-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.