AS19247 Northwestern Memorial Hospital
184.108.40.206/24 - NMHC
NetHandle: NET-204-62-116-0-1 OrgID: NMH-1 Parent: NET-204-0-0-0-0 NetName: NMHC NetRange: 220.127.116.11 - 18.104.22.168 NetType: assignment OriginAS: 19247 RegDate: 2008-12-24 Updated: 2017-07-07 Source: ARIN OrgID: NMH-1 OrgName: Northwestern Memorial Hospital CanAllocate: Street: 259 East Erie Street City: Chicago State/Prov: IL Country: US PostalCode: 60611 RegDate: 1993-03-31 Updated: 2017-05-04 OrgAdminHandle: WILLI2120-ARIN OrgTechHandle: SYSAD36-ARIN OrgAbuseHandle: SYSAD36-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.