V6NetHandle: NET6-2600-2100-1 OrgID: ABL-81 Parent: NET6-2600-1 NetName: ASTOUND-V6-1 NetRange: 2600:2100:: - 2600:210F:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 11404 RegDate: 2014-11-21 Updated: 2014-11-21 Source: ARIN OrgID: ABL-81 OrgName: Astound Broadband LLC CanAllocate: Street: 401 Kirkland Parkplace Street: Suite 500 City: Kirkland State/Prov: WA Country: US PostalCode: 98033 Comment: Wave Division Holdings CLEC and CA operating entity RegDate: 2014-06-11 Updated: 2018-01-09 OrgTechHandle: IAT18-ARIN OrgNOCHandle: WDHN-ARIN OrgAbuseHandle: WDHN-ARIN OrgAdminHandle: IAT18-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.