NetHandle: NET-151-188-0-0-1 OrgID: FCPS Parent: NET-151-0-0-0-0 NetName: FCPS NetRange: 220.127.116.11 - 18.104.22.168 NetType: assignment OriginAS: 21984 RegDate: 1991-09-23 Updated: 2008-08-13 AbuseHandle: ZF70-ARIN NOCHandle: ZF70-ARIN TechHandle: ZF70-ARIN Source: ARIN OrgID: FCPS OrgName: Fairfax County Public Schools CanAllocate: Street: 3701 Franconia Road City: Alexandria State/Prov: VA Country: US PostalCode: 22310 RegDate: 1991-09-23 Updated: 2007-12-07 OrgAbuseHandle: ZF70-ARIN OrgNOCHandle: ZF70-ARIN OrgAdminHandle: ZF70-ARIN OrgTechHandle: ZF70-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.