V6NetHandle: NET6-2001-504-B-1 OrgID: PACIF-24 Parent: NET6-2001-400-0 NetName: PACIFIC-WAVE-V6 NetRange: 2001:504:B:: - 2001:504:B:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment RegDate: 2005-02-11 Updated: 2012-02-24 Source: ARIN OrgID: PACIF-24 OrgName: Pacific Wave CanAllocate: Street: c/o Pacific Northwest Gigapop Street: 113 Cherry St #30685 City: Seattle State/Prov: WA Country: US PostalCode: 98104-2205 RegDate: 2004-07-28 Updated: 2017-01-28 OrgNOCHandle: PWN1-ARIN OrgTechHandle: PWN1-ARIN OrgAdminHandle: CAN11-ARIN OrgAbuseHandle: PWN1-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.