AS22255 Allegheny Health Network
184.108.40.206/16 - AHERF
NetHandle: NET-165-232-0-0-1 OrgID: AHERF Parent: NET-165-0-0-0-0 NetName: AHERF NetRange: 220.127.116.11 - 18.104.22.168 NetType: assignment RegDate: 1993-09-27 Updated: 2001-08-28 TechHandle: PK81-ARIN Source: ARIN OrgID: AHERF OrgName: Allegheny Health Education and Research Foundation CanAllocate: Street: 320 East North Avenue City: Pittsburgh State/Prov: PA Country: US PostalCode: 15212 RegDate: 1993-09-27 Updated: 2011-09-24 OrgTechHandle: PK81-ARIN OrgAbuseHandle: PK81-ARIN OrgAdminHandle: PK81-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.