AS174 Cogent Communications
220.127.116.11/24 - PSI-BLK-C2-172
NetHandle: NET-204-243-172-0-1 OrgID: C00006178 Parent: NET-204-240-0-0-1 NetName: PSI-BLK-C2-172 NetRange: 18.104.22.168 - 22.214.171.124 NetType: reassignment RegDate: 1995-06-03 Updated: 1995-06-03 Source: ARIN OrgID: C00006178 OrgName: PSINET/VHB Inc. CanAllocate: Street: 101 Walnut Street City: Watertown State/Prov: MA Country: US PostalCode: 02172 RegDate: 1995-06-03 Updated: 2011-03-19 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.