2607:fac8::/36 - SVCOLO-IPV6
V6NetHandle: NET6-2607-FAC8-1 OrgID: SVC-11 Parent: NET6-2600-1 NetName: SVCOLO-IPV6 NetRange: 2607:FAC8:: - 2607:FAC8:FFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 10565 RegDate: 2009-06-01 Updated: 2013-07-29 TechHandle: SINA-ARIN AbuseHandle: SAC43-ARIN Source: ARIN OrgID: SVC-11 OrgName: Silicon Valley Colocation, Inc. CanAllocate: Street: PO Box 390804 City: Mountain View State/Prov: CA Country: US PostalCode: 94039 RegDate: 2007-01-16 Updated: 2017-01-28 OrgTechHandle: SINA-ARIN OrgAbuseHandle: SAC43-ARIN OrgNOCHandle: SINA-ARIN OrgAdminHandle: SINA-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.