IPLIST.NET - sys.cogentco.com

Search for IP or hostnames:

sys.cogentco.com checked at 2025-10-04T19:01:39.454Z 179ms 56/56/56 100% R:12

`sys.cogentco.com`

NS	`auth1.dns.cogentco.com`
		A	2001:550:1:a::d ^{🇺🇸 Cogent Communications, Inc.}
			PTR	`auth1.dns.cogentco.com`
		A	66.28.0.14^{🇺🇸 Cogent Communications, Inc.}
			PTR	`auth1.dns.cogentco.com`
NS	`auth2.dns.cogentco.com`
		A	2001:550:1:b::d ^{🇺🇸 Cogent Communications, Inc.}
			PTR	`auth2.dns.cogentco.com`
		A	66.28.0.30^{🇺🇸 Cogent Communications, Inc.}
			PTR	`auth2.dns.cogentco.com`

`cogentco.com`

	NS	`auth1.dns.cogentco.com`
	NS	`auth2.dns.cogentco.com`
	MX	`cogentco-com.mail.protection.outlook.com`
	A	2001:550:1::cc01 ^{🇺🇸 Cogent Communications, Inc.}
	A	38.100.128.10^{🇩🇪 Cogent Communications, Inc.}

rank #84499 globally
rank #42356 in the tld

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AI analysis

sys.cogentco.com is a parent of custtools.sys.cogentco.com, la-cust-mx.sys.cogentco.com, littleb.sys.cogentco.com, ntpmaster1.sys.cogentco.com, res1-la.sys.cogentco.com and a few other host names.

Two name servers auth1.dns.cogentco.com and auth2.dns.cogentco.com handle the delegation for sys.cogentco.com.

sys.cogentco.com shares the same name server setup as other domains, for example 68.198.in-addr.arpa, em.aspca.org, stuckynet.com, sbgremote.com and 94.103.38.in-addr.arpa.

sys.cogentco.com at least partially shares name servers with other domains, for example columbia.edu, ceramicsonline.org, infowaycertification.com, the-berlin-wall.com and 76.115.209.in-addr.arpa.

these name servers are commonly used with the following name servers: nsa.ups.com, nsb.ups.com, cbru.br.ns.els-gms.att.net, cmtu.mt.ns.els-gms.att.net, ns1.fnsi.net, ns2.fnsi.net, ns3.fnsi.net, ns1.vodafone-ip.de, ns2.vodafone-ip.de and ext-ns1.columbia.edu.

Host names with two IP numbers:

auth1.dns.cogentco.com points to 2001:550:1:a::d and 66.28.0.14.

auth2.dns.cogentco.com points to 2001:550:1:b::d and 66.28.0.30.

dbq