NetHandle: NET-66-28-0-0-1 OrgID: COGC Parent: NET-66-0-0-0-0 NetName: COGENT-NB-0000 NetRange: 184.108.40.206 - 220.127.116.11 NetType: allocation Comment: ADDRESSES WITHIN THIS BLOCK ARE NON-PORTABLE Comment: Reassignment information for this block can be found at Comment: rwhois.cogentco.com 4321 RegDate: 2000-10-12 Updated: 2012-03-02 TechHandle: ZC108-ARIN Source: ARIN OrgID: COGC OrgName: Cogent Communications CanAllocate: Street: 2450 N Street NW City: Washington State/Prov: DC Country: US PostalCode: 20037 RegDate: 2000-05-30 Updated: 2017-08-17 ReferralServer: rwhois://rwhois.cogentco.com:4321 OrgAdminHandle: IPALL-ARIN OrgAbuseHandle: COGEN-ARIN OrgNOCHandle: ZC108-ARIN OrgTechHandle: IPALL-ARIN Source: ARIN
IP Addresses in this range
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.