NetHandle: NET-63-251-55-0-1 OrgID: C04900627 Parent: NET-63-251-0-0-1 NetName: INAP-SFO-CONFIRMIT-63-251-55-0 NetRange: 184.108.40.206 - 220.127.116.11 NetType: reassignment Comment: rirCallout v1.07, Mon Mar 17 23:19:52 -0400 2014 RegDate: 2014-03-17 Updated: 2014-03-17 Source: ARIN OrgID: C04900627 OrgName: Confirmit Inc CanAllocate: Street: 150 Spear Street #1350 City: San Francisco State/Prov: CA Country: US PostalCode: 94105 Comment: created by rirCallout v1.07 for NET-63-251-0-0-1 RegDate: 2014-03-17 Updated: 2014-03-17 Source: ARIN
IP Addresses in this 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.