AS3549 Level 3 Parent, LLC
2620:cb::/48 - ITRON
V6NetHandle: NET6-2620-CB-1 OrgID: ITRON Parent: NET6-2620-1 NetName: ITRON NetRange: 2620:CB:: - 2620:CB:F:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment OriginAS: 22900 RegDate: 2011-03-09 Updated: 2015-10-21 Source: ARIN OrgID: ITRON OrgName: ITRON CanAllocate: Street: 2111 N. Molter Road City: Liberty Lake State/Prov: WA Country: US PostalCode: 99019 RegDate: 1993-05-28 Updated: 2015-09-09 OrgTechHandle: DTF-ARIN OrgTechHandle: DOMIN74-ARIN OrgAdminHandle: RBO165-ARIN OrgAbuseHandle: RBO165-ARIN Source: ARIN POCHandle: RBO165-ARIN IsRole: N LastName: Bowers FirstName: Rick Street: 2111 N. Molter Road City: Liberty Lake State/Prov: WA Country: US PostalCode: 99019 RegDate: 2009-06-10 Updated: 2017-08-15 MobilePhone: +1-510-710-7675 OfficePhone: +1-510-710-7675 Mailbox: email@example.com 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.