151.155.0.0/16

NetHandle:      NET-151-155-0-0-1
OrgID:          NOVELL-1
Parent:         NET-151-0-0-0-0
NetName:        NOVELL-2
NetRange:       151.155.0.0 - 151.155.255.255
NetType:        assignment
RegDate:        1991-07-30
Updated:        2008-12-31
AbuseHandle:    BWA3-ARIN
NOCHandle:      BWA3-ARIN
TechHandle:     BWA3-ARIN
Source:         ARIN


OrgID:          NOVELL-1
OrgName:        Novell, Inc.
CanAllocate:    
Street:         1800 South Novell Place
City:           Provo
State/Prov:     UT
Country:        US
PostalCode:     84606
RegDate:        1970-01-01
Updated:        2016-04-20
OrgAbuseHandle: INT1-ARIN
OrgAdminHandle: INT1-ARIN
OrgTechHandle:  INT1-ARIN
Source:         ARIN


POCHandle:      BWA3-ARIN
IsRole:         N
LastName:       Wayne
FirstName:      Bruce
Street:         1800 South Novell Place
Street:         MS PRV-H11
City:           Provo
State/Prov:     UT
Country:        US
PostalCode:     84606
RegDate:        2002-10-27
Updated:        2018-10-30
OfficePhone:    +1-801-861-2222
Mailbox:        bwayne@novell.com
Source:         ARIN


POCHandle:      INT1-ARIN
IsRole:         Y
LastName:       IT Network Team
FirstName:      
Street:         515 Post Oak Blvd., 
Street:         Ste. 1200
City:           Houston
State/Prov:     TX
Country:        US
PostalCode:     77027
RegDate:        2007-05-24
Updated:        2020-05-01
OfficePhone:    +1-713-548-1700
Mailbox:        itnetwork@microfocus.com
Mailbox:        itnetwork@attachmate.com
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.