`mailserver1.ist-sysadmin.de`

DNSSEC	⚠️ Not signed
A	2a01:4f8:13b:1c02:188:40:188:150^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
		PTR	`mailserver1.ist-sysadmin.de`
A	188.40.188.150^{🇩🇪 Hetzner188.40.0.0/16 HETZNER-RZ-FKS-BLK1}

`ist-sysadmin.de`

	DNSSEC	⚠️ Not signed
	A	62.75.208.102
	NS	`ns1.ist-sysadmin.de` ⭐
	NS	`ns2.ist-sysadmin.de`
	MX	`mailserver1.ist-sysadmin.de` ⭐
	TXT	`v=spf1 mx -all`
	SOA	`ns1.ist-sysadmin.de`hostmaster@gerbig.info 2025-07-04 #1

PTR for

0.5.1.0.8.8.1.0.0.4.0.0.8.8.1.0.2.0.c.1.b.3.1.0.8.f.4.0.1.0.a.2.ip6.arpa

MX for

gerbig.info

ist-webmaster.de

bot-reagenz.de

ist-sysadmin.de

tierarzt-koeddingen.de

gerbig.mobi

ist-kult.de

istkult.de

Previously MX for

gerbig-musik.de

Same first word

mailserver1.de

mailserver1.com

mailserver1.eu

mailserver1.at

Similar names

mail1server.com

DNS History

4 records (2 active, 2 former)

●A188.40.188.1502021-06-15 → 2026-07-22 · 3 obs

○ 2016-12-27 21:37:02
● 2021-06-15 06:32:24
● 2026-07-22 03:17:28

○A2a01:4f8:100:9ff7:78:47:151:862015-08-05 → 2016-12-27 · 4 obs

● 2015-08-05 14:57:02
● 2016-12-27 21:37:02
○ 2021-06-15 06:32:24
○ 2026-07-22 03:17:28

●A2a01:4f8:13b:1c02:188:40:188:1502021-06-15 → 2026-07-22 · 3 obs

○ 2016-12-27 21:37:02
● 2021-06-15 06:32:24
● 2026-07-22 03:17:28

○A78.47.151.862015-08-05 → 2016-12-27 · 4 obs

● 2015-08-05 14:57:02
● 2016-12-27 21:37:02
○ 2021-06-15 06:32:24
○ 2026-07-22 03:17:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	f.nic.de, a.nic.de, z.nic.de	-
ist-sysadmin.de	ns1.ist-sysadmin.de, ns2.ist-sysadmin.de	2 records

✅ Authoritative Response

Server:78.47.90.50

NS records: ns1.ist-sysadmin.de, ns2.ist-sysadmin.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ist-sysadmin.de (unsigned zone)

⏱️ Timing

Total: 1729ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`188.40.188.150`
AAAA	1	`2a01:4f8:13b:1c02:188:40:188:150`

📌 Glue Records Collected

Total: 2

In-bailiwick: 2 (ns1.ist-sysadmin.de, ns2.ist-sysadmin.de)

Analysis

Mail Server Role

mailserver1.ist-sysadmin.de is an MX host for gerbig.info, ist-webmaster.de, bot-reagenz.de, ist-sysadmin.de, tierarzt-koeddingen.de and a few other domains.

mailserver2.ist-sysadmin.de frequently appears as a mail server alongside mailserver1.ist-sysadmin.de.

IP Addresses

mailserver1.ist-sysadmin.de points to the IP addresses 188.40.188.150 and 2a01:4f8:13b:1c02:188:40:188:150

mailserver1.ist-sysadmin.de - robtex.com