216.104.48.0/21

NetHandle:      NET-216-104-48-0-1
OrgID:          VMC-11
Parent:         NET-216-0-0-0-0
NetName:        VALLEYMED-ORG
NetRange:       216.104.48.0 - 216.104.63.255
NetType:        assignment
RegDate:        2000-12-07
Updated:        2012-03-02
TechHandle:     TRC14-ARIN
Source:         ARIN


OrgID:          VMC-11
OrgName:        Valley Medical Center
CanAllocate:    
Street:         400 S 43rd Street
City:           Renton
State/Prov:     WA
Country:        US
PostalCode:     98055
RegDate:        2000-12-07
Updated:        2011-09-24
OrgAbuseHandle: TRC14-ARIN
OrgAdminHandle: TRC14-ARIN
OrgTechHandle:  TRC14-ARIN
Source:         ARIN


POCHandle:      TRC14-ARIN
IsRole:         N
LastName:       COLLINS
FirstName:      TAWNY
Street:         400 S 43rd Street
City:           Renton
State/Prov:     WA
Country:        US
PostalCode:     98055
RegDate:        2005-10-04
Updated:        2017-12-15
FaxPhone:       +1-425-656-5362
OfficePhone:    +1-425-228-3440
MobilePhone:    +1-425-208-2662
Mailbox:        tawny@valleymed.org
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.