AS395747 Cloudflare, Inc.
2606:4700:2001::/48 - CLOUDFLARENET
V6NetHandle: NET6-2606-4700-1 OrgID: CLOUD14 Parent: NET6-2600-1 NetName: CLOUDFLARENET NetRange: 2606:4700:: - 2606:4700:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 13335 Comment: All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse RegDate: 2011-11-01 Updated: 2017-02-17 AbuseHandle: ABUSE2916-ARIN TechHandle: ADMIN2521-ARIN NOCHandle: NOC11962-ARIN Source: ARIN OrgID: CLOUD14 OrgName: Cloudflare, Inc. CanAllocate: Street: 101 Townsend Street City: San Francisco State/Prov: CA Country: US PostalCode: 94107 Comment: All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse RegDate: 2010-07-09 Updated: 2018-10-10 OrgAbuseHandle: ABUSE2916-ARIN OrgNOCHandle: NOC11962-ARIN OrgTechHandle: ADMIN2521-ARIN OrgAdminHandle: ADMIN2521-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.