General Info

ID

TWTC-NETBLK-15

Description

tw telecom holdings, inc.

ASN

AS22218 ITC Global

Country
United States
Registry

arin

Whois Details

NetHandle:      NET-204-57-64-0-1
OrgID:          TWTC
Parent:         NET-204-0-0-0-0
NetName:        TWTC-NETBLK-15
NetRange:       204.57.64.0 - 204.57.127.255
NetType:        allocation
Comment:        ADDRESSES WITHIN THIS BLOCK ARE NON-PORTABLE
RegDate:        1994-09-27
Updated:        2012-02-24
Source:         ARIN


OrgID:          TWTC
OrgName:        tw telecom holdings, inc.
CanAllocate:    
Street:         10475 Park Meadows Drive
City:           Littleton
State/Prov:     CO
Country:        US
PostalCode:     80124
RegDate:        1999-03-17
Updated:        2017-01-28
ReferralServer: rwhois://rwhois.twtelecom.net:4321
OrgAdminHandle: ZT87-ARIN
OrgTechHandle:  NST12-ARIN
OrgNOCHandle:   TDN1-ARIN
OrgAbuseHandle: TWTAD-ARIN
Source:         ARIN

Details

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.