AS11820 Wikimedia Foundation, Inc.
2620:62:c000::/48 - WMFOIT
V6NetHandle: NET6-2620-62-C000-1 OrgID: WF-44 Parent: NET6-2620-1 NetName: WMFOIT NetRange: 2620:62:C000:: - 2620:62:C000:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment OriginAS: 11820 RegDate: 2013-12-13 Updated: 2013-12-13 Source: ARIN OrgID: WF-44 OrgName: Wikimedia Foundation, Inc. CanAllocate: Street: 1 Montgomery Street Street: 16th Floor City: San Francisco State/Prov: CA Country: US PostalCode: 94105 RegDate: 2013-09-10 Updated: 2017-09-25 OrgAbuseHandle: WOI-ARIN OrgTechHandle: WOI-ARIN OrgNOCHandle: WOI-ARIN OrgAdminHandle: WOI-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.