rtk.de - dns.ninja

`rtk.de`

DNSSEC	⚠️ Not signed
A	89.63.27.241^{🇩🇪 WAG89.63.16.0/20 WORTMANN AG Bredenhop 20 32609 Huellhorst Germany}
NS	`ns1.nepustil.net` ⭐
		A	2001:14f8:7::1^{🇩🇪 NEPUSTILNET-AS012001:14f8::/32 Nepustil.net IPv6}
			PTR	`ns.nepustil.eu`
			PTR	`ns1.nepustil.net`
		A	212.71.212.81^{🇩🇪 NEPUSTILNET-AS01212.71.192.0/19 NEPUSTIL-NET-RO-01 Dr.-Ing. Nepustil & Co. GmbH Bempflingen, Germany}
			PTR	`ns.nepustil.eu`
			PTR	`ns1.nepustil.net`
NS	`ns.nepustil.com`
		A	2001:14f8:8::1^{🇩🇪 NEPUSTILNET-AS012001:14f8::/32 Nepustil.net IPv6}
			PTR	`ns.nepustil.com`
			PTR	`ns.nepustil.de`
		A	212.71.200.209^{🇩🇪 NEPUSTILNET-AS01212.71.192.0/19 NEPUSTIL-NET-RO-01 Dr.-Ing. Nepustil & Co. GmbH Bempflingen, Germany}
			PTR	`ns.nepustil.com`
			PTR	`ns.nepustil.de`
MX	`rtk-de.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:c901::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-bl2pr04cu00201.inbound.protection.outlook.com`
		A	2a01:111:f403:c902::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sj2pr05cu00401.inbound.protection.outlook.com`
		A	2a01:111:f403:c931::^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sn1pr02cu00100.inbound.protection.outlook.com`
		A	2a01:111:f403:f90b::^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-bn6pr04cu00100.inbound.protection.outlook.com`
		A	52.101.9.20^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-bl0pr02cu00604.inbound.protection.outlook.com`
		A	52.101.11.13^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sn1pr0501cu00205.inbound.protection.outlook.com`
		A	52.101.40.2^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-cy1pr05cu00402.inbound.protection.outlook.com`
		A	52.101.40.6^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-cy1pr03cu00106.inbound.protection.outlook.com`
TXT	`google-site-verification=KkOYeWNCdvbxRdxQ5HSZlOicSMqBfKo1cYWaylMJAWQ`
TXT	`v=spf1 include:us._netblocks.mimecast.com include:spf.protection.outlook.com ...`
TXT	`MS=ms71617626`
SOA	`ns1.nepustil.net`hostmaster@nepustil.net 2026-07-02 #1

`de`

	DNSSEC	🔒 Signed (DS record present)
	NS	`f.nic.de` ⭐
	NS	`a.nic.de`
	NS	`l.de.net` ⚠️ Not in parent delegation
	NS	`n.de.net` ⚠️ Not in parent delegation
	NS	`s.de.net` ⚠️ Not in parent delegation
	NS	`z.nic.de`
	SOA	`f.nic.de`dns-operations@denic.de serial=1785885174

WOT: SAFE (66/100)

Same first word

rtk.co.uk

rtk.email

rtk.it

rtk.promo

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rtk.lv

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rtk.co.jp

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DNS History

16 records (4 active, 12 former)

○NScustomdns1.interscholz.net2017-01-18 → 2017-08-27 · 5 obs

○ 2016-10-18 04:49:10
● 2017-01-18 09:42:38
● 2017-08-27 09:38:50
○ 2026-03-15 05:13:24
○ 2026-08-04 23:33:50

○NSdns.interscholz.de2017-01-18 → 2017-08-27 · 5 obs

○ 2016-10-18 04:49:10
● 2017-01-18 09:42:38
● 2017-08-27 09:38:50
○ 2026-03-15 05:13:24
○ 2026-08-04 23:33:50

●NSns.nepustil.com2026-03-15 → 2026-08-04 · 3 obs

○ 2017-08-27 09:38:50
● 2026-03-15 05:13:24
● 2026-08-04 23:33:50

●NSns1.nepustil.net2026-03-15 → 2026-08-04 · 3 obs

○ 2017-08-27 09:38:50
● 2026-03-15 05:13:24
● 2026-08-04 23:33:50

○NSns1.s-dns.de2009-07-02 → 2016-10-18 · 4 obs

● 2009-07-02 14:43:18
● 2016-10-18 04:49:10
○ 2017-01-18 09:42:38
○ 2026-08-04 23:33:50

○NSns2.s-dns.de2009-07-02 → 2016-10-18 · 4 obs

● 2009-07-02 14:43:18
● 2016-10-18 04:49:10
○ 2017-01-18 09:42:38
○ 2026-08-04 23:33:50

○MXcluster8.eu.messagelabs.com2015-08-16 → 2017-08-27 · 5 obs

○ 2009-07-02 14:43:18
● 2015-08-16 16:40:26
● 2017-08-27 09:38:50
○ 2026-03-15 05:13:24
○ 2026-08-04 23:33:50

○MXcluster8a.eu.messagelabs.com2015-08-16 → 2017-08-27 · 5 obs

○ 2009-07-02 14:43:18
● 2015-08-16 16:40:26
● 2017-08-27 09:38:50
○ 2026-03-15 05:13:24
○ 2026-08-04 23:33:50

○MXmx.rtk.de2009-07-02 → 2009-07-02 · 3 obs

● 2009-07-02 14:43:18
○ 2015-08-16 16:40:26
○ 2026-08-04 23:33:50

●MXrtk-de.mail.protection.outlook.com2026-07-14 → 2026-08-04 · 3 obs

○ 2026-03-15 05:13:24
● 2026-07-14 23:20:08
● 2026-08-04 23:33:50

○MXus-smtp-inbound-1.mimecast.com2026-03-15 → 2026-03-15 · 4 obs

○ 2017-08-27 09:38:50
● 2026-03-15 05:13:24
○ 2026-07-14 23:20:08
○ 2026-08-04 23:33:50

○MXus-smtp-inbound-2.mimecast.com2026-03-15 → 2026-03-15 · 4 obs

○ 2017-08-27 09:38:50
● 2026-03-15 05:13:24
○ 2026-07-14 23:20:08
○ 2026-08-04 23:33:50

○A188.138.8.772015-08-16 → 2016-10-18 · 5 obs

○ 2009-07-02 14:43:18
● 2015-08-16 16:40:26
● 2016-10-18 04:49:10
○ 2017-01-18 09:42:38
○ 2026-08-04 23:33:50

○A194.30.185.1042017-01-18 → 2017-08-27 · 5 obs

○ 2016-10-18 04:49:10
● 2017-01-18 09:42:38
● 2017-08-27 09:38:50
○ 2026-03-15 05:13:24
○ 2026-08-04 23:33:50

○A62.26.212.1952009-07-02 → 2009-07-02 · 3 obs

● 2009-07-02 14:43:18
○ 2015-08-16 16:40:26
○ 2026-08-04 23:33:50

●A89.63.27.2412026-03-15 → 2026-08-04 · 3 obs

○ 2017-08-27 09:38:50
● 2026-03-15 05:13:24
● 2026-08-04 23:33:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
rtk.de	ns1.nepustil.net, ns.nepustil.com	-

✅ Authoritative Response

Server:212.71.212.81

NS records: ns1.nepustil.net, ns.nepustil.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rtk.de (unsigned zone)

⏱️ Timing

Total: 951ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`89.63.27.241`
NS	2	`ns1.nepustil.net, ns.nepustil.com`
MX	1	`rtk-de.mail.protection.outlook.com (pri:`
TXT	3	`MS=ms71617626, google-site-verification=KkOYeWNCdvbxRdx...`
SOA	1	`ns1.nepustil.net hostmaster.nepustil.net`

Analysis

IP Addresses

rtk.de has exactly one IP address — 89.63.27.241.

ful.de, rtk.in, britta-medeiros.com plus two other host names have IP numbers in common with rtk.de.

Name Servers

rtk.de uses two name servers for its delegation: ns.nepustil.com and ns1.nepustil.net.

The name server configuration of rtk.de is shared with other domains, for instance steffen-huettner.de, damowi.de, bitspirits.de and two others.

There is at least partial name server overlap between rtk.de and other domains — isolid.org, dflib.de, bildungsakademie-tue.de and two more among them.

These name servers tend to appear in combination with the name servers ns.nepustil.net, ns.nepustil.de, ns1.ispeg.eu and ns.opsec.eu.

The two host names ns.nepustil.com and ns1.nepustil.net each have a pair of IP addresses: ns.nepustil.com has 212.71.200.209 and 2001:14f8:8::1, and ns1.nepustil.net has 212.71.212.81 and 2001:14f8:7::1.

Mail Servers

rtk.de uses one mail server — rtk-de.mail.protection.outlook.com.

rtk-de.mail.protection.outlook.com has 8 IP addresses: 52.101.9.20, 52.101.11.13, 52.101.40.2 plus 5 more.