V6NetHandle: NET6-2620-2F-8000-1 OrgID: CPAT Parent: NET6-2620-1 NetName: CRITICALPATH NetRange: 2620:2F:8000:: - 2620:2F:8000:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment OriginAS: 702, 6830, 701, 10627, 7018 RegDate: 2011-05-03 Updated: 2012-03-02 Source: ARIN OrgID: CPAT OrgName: Critical Path Inc. CanAllocate: Street: c/o Openwave Messaging Inc. Street: 1600 Seaport Boulevard Suite 400 City: Redwood City State/Prov: CA Country: US PostalCode: 94063 RegDate: 1997-10-06 Updated: 2017-01-28 OrgAdminHandle: NETWO2647-ARIN OrgTechHandle: DOSIM-ARIN OrgTechHandle: NETWO2647-ARIN OrgNOCHandle: CSOC-ARIN OrgAbuseHandle: ABUSE4741-ARIN OrgNOCHandle: SERVI202-ARIN OrgNOCHandle: NOC32404-ARIN OrgAbuseHandle: NETWO2647-ARIN OrgTechHandle: CH-ORG-ARIN OrgAbuseHandle: CPAA-ARIN OrgTechHandle: KRIST8-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.