`linux-cologne.com`

DNSSEC	⚠️ Not signed
A	85.215.44.184^{🇩🇪 IONOS-AS85.215.32.0/19}
		PTR	`mx.linux-cologne.com`
NS	`ns1.first-ns.de` ⭐
		A	2a01:4f8:0:a101::a:1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`ns1.first-ns.de`
		A	213.239.242.238^{🇩🇪 Hetzner213.239.192.0/18 HETZNER-RZ-NBG-BLK2}
			PTR	`ns1.first-ns.de`
NS	`robotns2.second-ns.de`
		A	2a01:4f8:0:1::5ddc:2^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`robotns2.second-ns.de`
		A	213.133.100.103^{🇩🇪 Hetzner213.133.96.0/19 HETZNER-RZ-NBG-BLK1}
			PTR	`robotns2.second-ns.de`
NS	`robotns3.second-ns.com` ⚠️ Not in parent delegation
		A	2001:67c:192c::add:a3^{🇩🇪 NORIS-NETWORK2001:67c:192c::/48}
			PTR	`robotns3.second-ns.com`
		A	193.47.99.3^{🇩🇪 NORIS-NETWORK193.47.99.0/24}
			PTR	`robotns3.second-ns.com`
MX	`mx.linux-cologne.com` ⭐
		A	2a02:2479:4e:ee00::1^{🇩🇪 IONOS-AS2a02:2478::/29 IONOS SE}
			PTR	`mx.linux-cologne.com`
		A	85.215.44.184^{🇩🇪 IONOS-AS85.215.32.0/19}
			PTR	`mx.linux-cologne.com`
TXT	`v=spf1 mx ip4:ip4:85.215.44.184 ip6:2a02:247a:241:8f00:1::1 -all`
SOA	`ns1.first-ns.de`dns@hetzner.com 2026-02-14 #1

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1774413007

Subdomains

domu00.linux-cologne.com

domu05.linux-cologne.com

mx.linux-cologne.com

hoth.linux-cologne.com

Same first word

linux-cologne.com

linux-cologne.de

DNS History

9 records (5 active, 4 former)

●NSns1.first-ns.de2015-06-09 → 2026-03-25 · 2 obs

● 2015-06-09 14:36:56
● 2026-03-25 04:40:04

●NSrobotns2.second-ns.de2015-06-09 → 2026-03-25 · 2 obs

● 2015-06-09 14:36:56
● 2026-03-25 04:40:04

●NSrobotns3.second-ns.com2026-02-15 → 2026-03-25 · 3 obs

○ 2015-06-09 14:36:56
● 2026-02-15 03:54:14
● 2026-03-25 04:40:04

○MXdomu05.linux-cologne.com2026-02-15 → 2026-03-25 · 2 obs

○ 2026-02-15 03:54:14
○ 2026-03-25 04:40:04

○MXmail.blunicorn.com2015-06-09 → 2019-04-11 · 4 obs

● 2015-06-09 14:36:56
● 2019-04-11 13:12:48
○ 2026-02-15 03:54:14
○ 2026-03-25 04:40:04

●MXmx.linux-cologne.com2026-02-15 → 2026-03-25 · 3 obs

○ 2019-04-11 13:12:48
● 2026-02-15 03:54:14
● 2026-03-25 04:40:04

○A138.201.54.1882026-02-15 → 2026-03-25 · 2 obs

○ 2026-02-15 03:54:14
○ 2026-03-25 04:40:04

○A144.76.219.1502015-06-09 → 2019-04-11 · 4 obs

● 2015-06-09 14:36:56
● 2019-04-11 13:12:48
○ 2026-02-15 03:54:14
○ 2026-03-25 04:40:04

●A85.215.44.1842026-02-15 → 2026-03-25 · 3 obs

○ 2019-04-11 13:12:48
● 2026-02-15 03:54:14
● 2026-03-25 04:40:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	j.gtld-servers.net, g.gtld-servers.net, i.gtld-servers.net, k.gtld-servers.net...	-
linux-cologne.com	ns1.first-ns.de, robotns2.second-ns.de	-

✅ Authoritative Response

Server:213.239.242.238

NS records: ns1.first-ns.de, robotns2.second-ns.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for linux-cologne.com (unsigned zone)

⏱️ Timing

Total: 3540ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`85.215.44.184`
NS	3	`ns1.first-ns.de, robotns2.second-ns.de...`
MX	1	`mx.linux-cologne.com (pri: 10)`
TXT	1	`v=spf1 mx ip4:ip4:85.215.44.184 ip6:2a02`
SOA	1	`ns1.first-ns.de dns.hetzner.com`

Analysis

Hierarchy

linux-cologne.com is a parent of domu00.linux-cologne.com, domu05.linux-cologne.com, mx.linux-cologne.com and hoth.linux-cologne.com.

IP Addresses

linux-cologne.com points to a single IP number: 85.215.44.184.

Other host names, for instance ip85-215-44-184.pbiaas.com, hoth.linux-cologne.com, bluefrogs.de, weinkun.de and linuxcologne.de share IP numbers with linux-cologne.com.

Name Servers

The delegation for linux-cologne.com is handled by three name servers: robotns3.second-ns.com, ns1.first-ns.de and robotns2.second-ns.de.

linux-cologne.com at least partially shares name servers with other domains, for instance argamasilla.com, vianovis.info, vablo.de, renegrau.com and domiterra.info.

These name servers are commonly used with the name servers hydrogen.ns.hetzner.com.

Two IP numbers per host:

robotns3.second-ns.com points to 2001:67c:192c::add:a3 and 193.47.99.3.

ns1.first-ns.de points to 2a01:4f8:0:a101::a:1 and 213.239.242.238.

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

Mail Servers

linux-cologne.com is handled by a single mail server, mx.linux-cologne.com.

linux-cologne.com shares its mail server setup with other domains, including bluefrogs.de, linuxcologne.de, 3amigos.de and web-cologne.net.

mx.linux-cologne.com resolves to two IP numbers: 2a02:2479:4e:ee00::1 and 85.215.44.184.

linux-cologne.com - robtex.com