74.203.155.0/24

NetHandle:      NET-74-202-0-0-1
OrgID:          TWTC
Parent:         NET-74-0-0-0-0
NetName:        TWTC-NETBLK-9
NetRange:       74.202.0.0 - 74.203.255.255
NetType:        allocation
RegDate:        2006-11-14
Updated:        2012-02-24
AbuseHandle:    TWTAD-ARIN
NOCHandle:      TDN1-ARIN
TechHandle:     ZT87-ARIN
Source:         ARIN


OrgID:          TWTC
OrgName:        tw telecom holdings, inc.
CanAllocate:    
Street:         10475 Park Meadows Drive
City:           Littleton
State/Prov:     CO
Country:        US
PostalCode:     80124
Comment:        ADDRESSES WITHIN THIS BLOCK ARE NON-PORTABLE ANY ISP ANNOUNCING PORTIONS WITHIN OUR RANGES SHOULD NOT RELY ON PRESENTED LOA'S UNLESS THOSE RANGES ARE ALSO ANNOUNCED TO A CENTURYLINK ASN.
Comment:        All abuse reports MUST include:
Comment:        * src IP
Comment:        * dest IP (your IP)
Comment:        * dest port
Comment:        * Accurate date/timestamp and timezone of activity
Comment:        * Intensity/frequency (short log extracts)
Comment:        * Your contact details (phone and email)
Comment:        Without these we will be unable to identify the correct owner of the IP address at that point in time.
Comment:        For subpoena or court order please fax 844.254.5800 or refer to our Law Enforcement Support page http://www.centurylink.com/static/Pages/AboutUs/Legal/LawEnforcement/
RegDate:        1999-03-17
Updated:        2020-08-11
ReferralServer: rwhois://rwhois.ctl.one:4321
OrgAbuseHandle: TWTAD-ARIN
OrgAdminHandle: ZT87-ARIN
OrgNOCHandle:   TDN1-ARIN
OrgTechHandle:  NST12-ARIN
Source:         ARIN


POCHandle:      TWTAD-ARIN
IsRole:         Y
LastName:       tw telecom Abuse Desk
FirstName:      
Street:         1025 Eldorado Blvd.
City:           Broomfield
State/Prov:     CO
Country:        US
PostalCode:     80021
RegDate:        2002-10-07
Updated:        2019-07-05
OfficePhone:    +1-800-829-0420
Mailbox:        security@level3.com
Mailbox:        abuse@level3.com
Source:         ARIN


POCHandle:      ZT87-ARIN
IsRole:         Y
LastName:       IP Manager
FirstName:      
Street:         700 W Mineral Ave
City:           Littleton
State/Prov:     CO
Country:        US
PostalCode:     80120
RegDate:        2001-08-03
Updated:        2020-03-05
OfficePhone:    +1-800-829-0420
Mailbox:        ipinv@centurylink.com
Mailbox:        ipadmin@centurylink.com
Source:         ARIN


POCHandle:      NST12-ARIN
IsRole:         Y
LastName:       NOC SWIP Team
FirstName:      
Street:         10475 Park Meadows Drive
City:           Littleton
State/Prov:     CO
Country:        US
PostalCode:     80124
RegDate:        2003-05-21
Updated:        2019-07-05
OfficePhone:    +1-800-829-0420
Mailbox:        ipaddressing@level3.com
Source:         ARIN


POCHandle:      TDN1-ARIN
IsRole:         Y
LastName:       TWTC Data NOC
FirstName:      
Street:         10475 Park Meadows Drive
City:           Littleton
State/Prov:     CO
Country:        US
PostalCode:     80124
RegDate:        2003-05-23
Updated:        2019-07-05
OfficePhone:    +1-800-829-0420
Mailbox:        noc.coreip@level3.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.