WWW.RTSAK.COM - ct.de

Search for IP or hostnames:

ct.de checked at 2025-11-22T12:35:23.468Z 456ms 100/100/100 100% R:19 allDone:true timedOut:false

`ct.de`

MX	`mx01.hornetsecurity.com`
		A	94.100.132.8^{🇩🇪 MK-NETZDIENSTE-AS}
			PTR	`mx01.hornetsecurity.com`
MX	`mx02.hornetsecurity.com`
		A	94.100.136.8^{🇩🇪 kyberio GmbH}
			PTR	`mx02.hornetsecurity.com`
MX	`mx03.hornetsecurity.com`
		A	94.100.134.8^{🇩🇪 HKN GmbH}
			PTR	`mx03.hornetsecurity.com`
MX	`mx04.hornetsecurity.com`
		A	94.100.136.7^{🇩🇪 kyberio GmbH}
			PTR	`mx04.hornetsecurity.com`
NS	`ns.heise.de`
		A	2a00:e68:14:800::d1ce ^{🇩🇪 net.DE AG}
			PTR	`ns.heise.de`
		A	193.99.145.37^{🇩🇪 net.DE AG}
			PTR	`ns.heise.de`
NS	`robotns2.second-ns.de`
		A	2a01:4f8:0:1::5ddc:2 ^{🇩🇪 Hetzner}
			PTR	`robotns2.second-ns.de`
		A	213.133.100.103^{🇩🇪 Hetzner}
			PTR	`robotns2.second-ns.de`
A	2a02:2e0:3fe:1001:302:: ^{🇩🇪 PLUSLINE}
		PTR	`redirector.heise.de`
A	193.99.144.80^{🇩🇪 PLUSLINE}
		PTR	`redirector.heise.de`

`de`

	NS	`a.nic.de`
	NS	`f.nic.de`
	NS	`z.nic.de`
	NS	`l.de.net`
	NS	`n.de.net`
	NS	`s.de.net`

rank #37703 globally
rank #922 in the tld

Up

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AI analysis

ct.de is the parent of www.ct.de.

ct.de points to two IPs: 2a02:2e0:3fe:1001:302:: and 193.99.144.80.

Other host names including heise-itsearch.de, www.ixlab.de, ct-verlag.de, heise-consulter.de and redirector.heise.de share IP numbers with ct.de.

ct.de's delegation uses two name servers, ns.heise.de and robotns2.second-ns.de.

ct.de shares the same name server setup as other domains, for example hinstorff.com, heise-korrekturen.de, ct-wissen.de, makerfaireberlin.com and open-source-meets-business.com.

ct.de at least partially shares name servers with other domains, including schneider-reinhard.de, osttelcom.de, 9612.de, sebschu.com and brandner.de.

These name servers are commonly used with the name servers ns1.first-ns.derobotns3.second-ns.comns.pop-hannover.dens2.pop-hannover.netns.plusline.de and ns.s.plusline.de.

Host names with two IPs:

ns.heise.de points to: 2a00:e68:14:800::d1ce and 193.99.145.37

robotns2.second-ns.de points to: 2a01:4f8:0:1::5ddc:2 and 213.133.100.103

ct.de is served by four mail servers: mx01.hornetsecurity.com, mx02.hornetsecurity.com, mx03.hornetsecurity.com and mx04.hornetsecurity.com.

The mail servers for ct.de are shared with other domains, for instance charlys-checkpoint.de, vlb-beton.at, pkv-institut.de, cyp.es and klinikum-konstanz.de.

Hostnames with a single IP:

mx01.hornetsecurity.com points to 94.100.132.8

mx02.hornetsecurity.com points to 94.100.136.8

mx03.hornetsecurity.com points to 94.100.134.8

mx04.hornetsecurity.com points to 94.100.136.7

dbq