General Info




Cogent Communications


AS11963 PennWell Corporation

United States


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Whois Details

V6NetHandle:    NET6-2001-550-1
OrgID:          COGC
Parent:         NET6-2001-400-0
NetName:        COGC-6NET-0001
NetRange:       2001:550:: - 2001:550:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF
NetType:        allocation
OriginAS:       174
RegDate:        2002-12-17
Updated:        2012-03-02
TechHandle:     ZC108-ARIN
Source:         ARIN

OrgID:          COGC
OrgName:        Cogent Communications
Street:         2450 N Street NW
City:           Washington
State/Prov:     DC
Country:        US
PostalCode:     20037
RegDate:        2000-05-30
Updated:        2017-08-17
ReferralServer: rwhois://
OrgAdminHandle: IPALL-ARIN
OrgTechHandle:  IPALL-ARIN
OrgAbuseHandle: COGEN-ARIN
OrgNOCHandle:   ZC108-ARIN
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.