AS1248 HERE Global BV
2001:490:4008::/48 - HERE-IPV6-1
V6NetHandle: NET6-2001-490-1 OrgID: NAVIGA-7 Parent: NET6-2001-400-0 NetName: HERE-IPV6-1 NetRange: 2001:490:: - 2001:490:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 1248 RegDate: 2001-07-11 Updated: 2014-05-14 AbuseHandle: ABUSE4735-ARIN TechHandle: SUONT-ARIN TechHandle: IBE11-ARIN Source: ARIN OrgID: NAVIGA-7 OrgName: HERE North America LLC CanAllocate: Street: 425 West Randolph Street City: Chicago State/Prov: IL Country: US PostalCode: 60606 RegDate: 2000-03-31 Updated: 2018-01-29 OrgAdminHandle: IBE11-ARIN OrgTechHandle: IBE11-ARIN OrgAbuseHandle: ABUSE4735-ARIN OrgAbuseHandle: IBE11-ARIN OrgTechHandle: SUONT-ARIN OrgNOCHandle: NOC31886-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.