184.108.40.206/21 - UMN-MRS-NET
NetHandle: NET-146-57-0-0-1 OrgID: UNIVER-233-Z Parent: NET-146-0-0-0-0 NetName: UMN-MRS-NET NetRange: 220.127.116.11 - 18.104.22.168 NetType: assignment OriginAS: 217, 57 RegDate: 1991-01-21 Updated: 2012-04-02 TechHandle: TP63-ARIN AbuseHandle: UOSA-ARIN NOCHandle: NTA-ORG-ARIN Source: ARIN OrgID: UNIVER-233-Z OrgName: University of Minnesota CanAllocate: Street: Office of Information Technology Street: 2218 Univ Ave SE City: Minneapolis State/Prov: MN Country: US PostalCode: 55414 Comment: http://www.umn.edu/ RegDate: 2009-10-13 Updated: 2014-08-20 OrgNOCHandle: NTA-ORG-ARIN OrgAdminHandle: NTA-ORG-ARIN OrgAbuseHandle: UOSA-ARIN OrgTechHandle: NTA-ORG-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.