NetHandle: NET-206-251-128-0-2 OrgID: CONCE-23 Parent: NET-206-251-128-0-1 NetName: XOXO-206-251-128-0-1 NetRange: 184.108.40.206 - 220.127.116.11 NetType: reallocation OriginAS: 4908 RegDate: 2008-06-25 Updated: 2008-06-25 Source: ARIN OrgID: CONCE-23 OrgName: Concentric CanAllocate: Street: 55 Almaden Blvd, Ste 700 City: San Jose State/Prov: CA Country: US PostalCode: 95113 RegDate: 2007-06-21 Updated: 2007-07-12 OrgAdminHandle: IPADM364-ARIN OrgAbuseHandle: NETWO1900-ARIN OrgTechHandle: IPADM364-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.