184.108.40.206/20 - SRU-BLK
NetHandle: NET-205-149-64-0-1 OrgID: SRU Parent: NET-205-0-0-0-0 NetName: SRU-BLK NetRange: 220.127.116.11 - 18.104.22.168 NetType: assignment RegDate: 1995-02-28 Updated: 2004-06-10 TechHandle: FJH14-ARIN Source: ARIN OrgID: SRU OrgName: Slippery Rock University CanAllocate: Street: Computer Center Street: 200 Maltby Center City: Slippery Rock State/Prov: PA Country: US PostalCode: 16057-1326 RegDate: 1995-02-28 Updated: 2011-09-24 OrgTechHandle: FJH14-ARIN OrgAbuseHandle: FJH14-ARIN OrgAdminHandle: FJH14-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.