2620:108:4018::/48 - ADOBE-SYSTEMS-INCORPORATED
V6NetHandle: NET6-2620-108-4000-1 OrgID: ADOBES Parent: NET6-2620-1 NetName: ADOBE-SYSTEMS-INCORPORATED NetRange: 2620:108:4000:: - 2620:108:40FF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment OriginAS: 22786, 19238, 14365 RegDate: 2011-10-18 Updated: 2012-03-02 Source: ARIN OrgID: ADOBES OrgName: Adobe Systems Inc. CanAllocate: Street: 345 Park Avenue City: San Jose State/Prov: CA Country: US PostalCode: 95110 RegDate: 1992-06-25 Updated: 2017-07-20 OrgAdminHandle: INTER86-ARIN OrgAbuseHandle: NOC3375-ARIN OrgTechHandle: INTER86-ARIN OrgNOCHandle: NOC3375-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.