DNSWHOIS.INFO - smtp.cogentco.com

Search for IP or hostnames:

smtp.cogentco.com checked at 2025-10-24T13:46:28.533Z 407ms 56/56/56 100% R:13

`smtp.cogentco.com`

NS	`auth1.dns.cogentco.com`
		A	2001:550:1:a::d ^{🇺🇸 COGENT}
			PTR	`auth1.dns.cogentco.com`
		A	66.28.0.14^{🇺🇸 COGENT}
			PTR	`auth1.dns.cogentco.com`
NS	`auth2.dns.cogentco.com`
		A	2001:550:1:b::d ^{🇺🇸 COGENT}
			PTR	`auth2.dns.cogentco.com`
		A	66.28.0.30^{🇺🇸 COGENT}
			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}
	A	38.100.128.10^{🇩🇪 COGENT}

rank #84499 globally
rank #42356 in the tld

Up

relay.smtp.cogentco.com

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AI analysis

relay.smtp.cogentco.com is a child of smtp.cogentco.com.

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

smtp.cogentco.com uses the same name server setup as other domains, such as 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 nsa.ups.com, nsb.ups.com, cbru.br.ns.els-gms.att.net, cmtu.mt.ns.els-gms.att.net, ns1.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