AS11976 Fidelity Communication International Inc.
2605:6700::/32 - NETBLK10-FIDN
V6NetHandle: NET6-2605-6700-1 OrgID: FIDN Parent: NET6-2600-1 NetName: NETBLK10-FIDN NetRange: 2605:6700:: - 2605:6700:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 11976 RegDate: 2011-07-11 Updated: 2011-07-11 Source: ARIN OrgID: FIDN OrgName: Fidelity Communication International Inc. CanAllocate: Street: 64 N.Clark City: Sullivan State/Prov: MO Country: US PostalCode: 63080 RegDate: 1995-06-20 Updated: 2019-04-11 OrgAdminHandle: MD872-ARIN OrgTechHandle: HYLTO6-ARIN OrgAbuseHandle: NOC2396-ARIN OrgTechHandle: NOC2396-ARIN OrgTechHandle: BELLJ79-ARIN OrgNOCHandle: BELLJ79-ARIN OrgNOCHandle: NOC2396-ARIN OrgNOCHandle: HYLTO6-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.