2607:5800::/32 - ISPN-BLK-1
V6NetHandle: NET6-2607-5800-1 OrgID: ISPN-1 Parent: NET6-2600-1 NetName: ISPN-BLK-1 NetRange: 2607:5800:: - 2607:5800:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 10320 RegDate: 2010-06-03 Updated: 2012-02-24 Source: ARIN OrgID: ISPN-1 OrgName: Internet Services Provider Network CanAllocate: Street: 14303 West 95th Street City: Lenexa State/Prov: KS Country: US PostalCode: 66215 RegDate: 1997-06-25 Updated: 2017-01-28 OrgAdminHandle: ISPNN-ARIN OrgTechHandle: CTS5-ARIN OrgAbuseHandle: CTS5-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.