2620:10a:9075::/48 - SORENSONVRS
V6NetHandle: NET6-2620-10A-9000-1 OrgID: SOREN-6 Parent: NET6-2620-1 NetName: SORENSONVRS NetRange: 2620:10A:9000:: - 2620:10A:90FF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment OriginAS: 11133 RegDate: 2012-01-30 Updated: 2013-11-06 Source: ARIN OrgID: SOREN-6 OrgName: Sorenson Communications, Inc. CanAllocate: Street: 4192 Riverboat Road City: Salt Lake City State/Prov: UT Country: US PostalCode: 84123 RegDate: 2005-12-15 Updated: 2017-02-25 OrgTechHandle: NOG22-ARIN OrgNOCHandle: NOG22-ARIN OrgTechHandle: DSC221-ARIN OrgAdminHandle: NOG22-ARIN OrgAbuseHandle: NOG22-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.