AS3491 PCCW Global, Inc.
220.127.116.11/21 - PCCW-SIN010-1
NetHandle: NET-63-216-197-0-1 OrgID: C02185114 Parent: NET-63-216-0-0-1 NetName: PCCW-SIN010-1 NetRange: 18.104.22.168 - 22.214.171.124 NetType: reassignment OriginAS: 3491 RegDate: 2009-03-13 Updated: 2009-03-13 Source: ARIN OrgID: C02185114 OrgName: Tanzia Limited CanAllocate: Street: MCPO Box 2601, 1257 Makati City, Philippines City: Makati City State/Prov: METRO MANILA Country: PH PostalCode: 1257 RegDate: 2009-03-13 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.