AS15164 Unite Private Networks LLC.
2607:da00:200::/40 - ASSOCIATED-COMPUTER-SYSTEMS
V6NetHandle: NET6-2607-DA00-201-1 OrgID: ACS-995 Parent: NET6-2607-DA00-1 NetName: ASSOCIATED-COMPUTER-SYSTEMS NetRange: 2607:DA00:201:: - 2607:DA00:201:FFFF:FFFF:FFFF:FFFF:FFFF NetType: reassignment OriginAS: 15164 RegDate: 2018-11-27 Updated: 2018-11-27 Source: ARIN OrgID: ACS-995 OrgName: Associated Computer Systems CanAllocate: Street: 900 N Kiplinger Ave City: Urbandale State/Prov: IA Country: US PostalCode: 50322 RegDate: 2018-11-27 Updated: 2018-11-27 OrgTechHandle: WESTO47-ARIN OrgAdminHandle: WESTO47-ARIN OrgAbuseHandle: WESTO47-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.