V6NetHandle: NET6-2610-128-1 OrgID: ENA-2 Parent: NET6-2610-1 NetName: ENA NetRange: 2610:128:: - 2610:128:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation RegDate: 2006-11-20 Updated: 2012-03-02 TechHandle: NOC115-ARIN NOCHandle: ZE33-ARIN AbuseHandle: ARA15-ARIN Source: ARIN OrgID: ENA-2 OrgName: Education Networks of America CanAllocate: Street: 618 Grassmere Park, Suite 12 City: Nashville State/Prov: TN Country: US PostalCode: 37211 RegDate: 1998-11-16 Updated: 2018-07-10 ReferralServer: rwhois://rwhois.ena.com:4321 OrgTechHandle: ZE33-ARIN OrgNOCHandle: ZE33-ARIN OrgAbuseHandle: ARA15-ARIN OrgAdminHandle: RMC6-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.