NetHandle: NET-154-57-0-0-1 OrgID: PSI-2 Parent: NET-154-0-0-0-0 NetName: COGENT-154-57-16 NetRange: 188.8.131.52 - 184.108.40.206 NetType: allocation OriginAS: 174 RegDate: 1992-02-05 Updated: 2017-10-30 Source: ARIN OrgID: PSI-2 OrgName: PSINet, Inc. CanAllocate: Street: 2450 N Street NW City: Washington State/Prov: DC Country: US PostalCode: 20037 RegDate: 1990-10-08 Updated: 2015-06-04 ReferralServer: rwhois://rwhois.cogentco.com:4321 OrgTechHandle: IPALL-ARIN OrgAdminHandle: IPALL-ARIN OrgNOCHandle: ZC108-ARIN OrgAbuseHandle: COGEN-ARIN Source: ARIN
IP address subranges within this IP 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.