WWW.RTSAK.COM - c4.is

Search for IP or hostnames:

c4.is checked at 2025-10-25T02:17:15.308Z 563ms 90/90/90 100% R:14

`c4.is`

NS	`ns3.core-networks.com`
		A	2001:1bc0:d::ffff ^{🇩🇪 Probe Networks}
			PTR	`ns3.core-networks.com`
		A	82.96.73.254^{🇩🇪 Probe Networks}
			PTR	`ns3.core-networks.com`
NS	`ns1.core-networks.de`
		A	2001:1bc0:d::fffe ^{🇩🇪 Probe Networks}
			PTR	`ns1.core-networks.de`
		A	194.213.5.254^{🇩🇪 Probe Networks}
			PTR	`ns1.core-networks.de`
MX	`nc1.mailkuh.de`
		A	2a03:4000:20:28:ba9b:6ab2:7d93:e989 ^{🇩🇪 netcup GmbH}
			PTR	`nc1.mailkuh.de`
		A	46.38.230.166^{🇩🇪 netcup GmbH}
			PTR	`nc1.mailkuh.de`
NS	`ns2.core-networks.eu`
		A	2a02:f98:0:22::ffff ^{🇩🇪 SURFPLANET-AS}
			PTR	`ns2.core-networks.eu`
		A	78.111.72.98^{🇩🇪 SURFPLANET-AS}
			PTR	`ns2.core-networks.eu`
A	2a03:4000:30:17a3::10:6130 ^{🇩🇪 netcup GmbH}
A	188.68.47.24^{🇩🇪 netcup GmbH}
		PTR	`a2f18.netcup.net`

`is`

	NS	`a.nic.is`
	NS	`b.nic.is`
	NS	`c.nic.is`
	NS	`d.nic.is`
	NS	`e.nic.is`

Up

klettur-3.c4.is

Starts with same word

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c4.de

AI analysis

c4.is is a parent of klettur-3.c4.is.

c4.is points to two IP numbers: 2a03:4000:30:17a3::10:6130 and 188.68.47.24.

Other host names such as lydiagerzen.de, mediaplusplus.net, p0rn.ch, scheider.net and tim-e.de share IP numbers with c4.is.

c4.is is delegated to three name servers: ns3.core-networks.com, ns1.core-networks.de and ns2.core-networks.eu.

At least part of the name servers for c4.is are shared with other domains, for instance dannhauer.de, nissens.de, marcel-keil.de, jbhs.eu and isp-1.de.

Host names with two IP numbers:

ns3.core-networks.com points to 2001:1bc0:d::ffff and 82.96.73.254

ns1.core-networks.de points to 2001:1bc0:d::fffe and 194.213.5.254

ns2.core-networks.eu points to 2a02:f98:0:22::ffff and 78.111.72.98

The mail server for c4.is is nc1.mailkuh.de.

c4.is uses the same mail server setup as other domains, for instance ptr.li, grillkunst.com, nf0.de, mailkuh.de and fridgeboxx.de.

Hostname nc1.mailkuh.de resolves to two IPs: 2a03:4000:20:28:ba9b:6ab2:7d93:e989 and 46.38.230.166.

dbq