IPLIST.NET - smtp.cogentco.com

Search for IP or hostnames:

smtp.cogentco.com checked at 2025-10-19T18:11:57.481Z 100ms 56/56/56 100% R:14

`smtp.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

Up

relay.smtp.cogentco.com

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AI analysis

smtp.cogentco.com is the parent of relay.smtp.cogentco.com.

smtp.cogentco.com's delegation uses two name servers, auth1.dns.cogentco.com and auth2.dns.cogentco.com.

smtp.cogentco.com shares the same name server setup as other domains, for example comtradedistribution.com, stewartlaw.com, 100.38.in-addr.arpa, mooncapital.com and 10.100.149.in-addr.arpa.

smtp.cogentco.com at least partially shares name servers with other domains, including inforadio.de, ard-sendezentrum.de, 194.45.45.in-addr.arpa, ard-sternpunkt.de and sandmaennchen.de.

These name servers are commonly used with the name servers nsa.ups.comnsb.ups.comcbru.br.ns.els-gms.att.netcmtu.mt.ns.els-gms.att.netns1.vodafone-ip.de and ns2.vodafone-ip.de.

Host names with two IPs:

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