2001:1828::/32 - ENET-XLHOST-IPV6
V6NetHandle: NET6-2001-1828-1 OrgID: ENET Parent: NET6-2001-1800-0 NetName: ENET-XLHOST-IPV6 NetRange: 2001:1828:: - 2001:1828:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 10297 Comment: abuse requests to firstname.lastname@example.org RegDate: 2010-02-09 Updated: 2012-03-02 NOCHandle: HOSTM634-ARIN AbuseHandle: ABUSE861-ARIN TechHandle: HOSTM634-ARIN Source: ARIN OrgID: ENET OrgName: eNET Inc. CanAllocate: Street: 3000 East Dublin Granville Rd. City: Columbus State/Prov: OH Country: US PostalCode: 43231 RegDate: 1996-04-10 Updated: 2009-08-20 OrgNOCHandle: HOSTM634-ARIN OrgTechHandle: HOSTM634-ARIN OrgAbuseHandle: ABUSE861-ARIN OrgAdminHandle: HOSTM634-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.