2620:125:9000::/48 - PURESTORAGEV6-2
V6NetHandle: NET6-2620-125-9000-1 OrgID: PS-298 Parent: NET6-2620-1 NetName: PURESTORAGEV6-2 NetRange: 2620:125:9000:: - 2620:125:90FF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment OriginAS: 10780 RegDate: 2016-02-16 Updated: 2016-02-16 Source: ARIN OrgID: PS-298 OrgName: Pure Storage, INC. CanAllocate: Street: 650 Castro St. Ste 400 City: Mountain View State/Prov: CA Country: US PostalCode: 94041 RegDate: 2014-05-06 Updated: 2014-05-06 OrgAbuseHandle: TECHN1273-ARIN OrgAbuseHandle: SUPPO153-ARIN OrgTechHandle: TECHN1273-ARIN OrgTechHandle: SUPPO153-ARIN OrgNOCHandle: TECHN1273-ARIN OrgNOCHandle: SUPPO153-ARIN OrgAdminHandle: TECHN1273-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.