147.103.0.0/16

NetHandle:      NET-147-103-0-0-1
OrgID:          HEADQU-3
Parent:         NET-147-0-0-0-0
NetName:        SDCW-NET
NetRange:       147.103.0.0 - 147.103.255.255
NetType:        assignment
RegDate:        1991-03-13
Updated:        2008-06-20
Source:         ARIN


OrgID:          HEADQU-3
OrgName:        Headquarters, USAISC
CanAllocate:    
Street:         NETC-ANC CONUS TNOSC
City:           Fort Huachuca
State/Prov:     AZ
Country:        US
PostalCode:     85613
RegDate:        1990-03-26
Updated:        2011-08-17
OrgAbuseHandle: REGIS10-ARIN
OrgAdminHandle: REGIS10-ARIN
OrgTechHandle:  REGIS10-ARIN
Source:         ARIN


POCHandle:      REGIS10-ARIN
IsRole:         Y
LastName:       Registration
FirstName:      
Street:         3990 E. Broad Street
City:           Columbus
State/Prov:     OH
Country:        US
PostalCode:     43218
RegDate:        2009-06-24
Updated:        2020-01-24
OfficePhone:    +1-844-347-2457
Mailbox:        disa.columbus.ns.mbx.arin-registrations@mail.mil
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.