72.13.170.0/23

NetHandle:      NET-72-13-170-0-1
OrgID:          C01029970
Parent:         NET-72-13-160-0-1
NetName:        NETBLOCK-WIBAND-EDM--RALWET1
NetRange:       72.13.170.0 - 72.13.170.255
NetType:        reassignment
RegDate:        2005-03-02
Updated:        2005-03-02
Source:         ARIN


OrgID:          C01029970
OrgName:        Ralcomm Wetaskiwin
CanAllocate:    
Street:         Private Residence - Wiband Communications
City:           Wetaskiwin
State/Prov:     AB
Country:        CA
PostalCode:     T6E-4Y1
RegDate:        2005-03-02
Updated:        2011-03-19
Source:         ARIN

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.