AS3491 PCCW Global, Inc.
220.127.116.11/21 - IRONP-209-9-240
NetHandle: NET-209-9-240-0-1 OrgID: C01331612 Parent: NET-209-8-0-0-1 NetName: IRONP-209-9-240 NetRange: 18.104.22.168 - 22.214.171.124 NetType: reassignment Comment: Comment: IRONP-1 RegDate: 2006-04-17 Updated: 2006-04-17 Source: ARIN OrgID: C01331612 OrgName: IronPath Networks CanAllocate: Street: 7969 Brightlight Place City: Ellicott City State/Prov: MD Country: US PostalCode: 21043 RegDate: 2006-04-17 Updated: 2011-03-19 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.