`sr-itsysteme.de`

DNSSEC	🔒 Signed (DS record present)
A	2606:4700:3031::6815:33b3^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3033::ac43:b792^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.51.179^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.183.146^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`mark.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b82^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mark.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c182^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`mark.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2182^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`mark.ns.cloudflare.com`
		A	108.162.193.130^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mark.ns.cloudflare.com`
		A	172.64.33.130^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mark.ns.cloudflare.com`
		A	173.245.59.130^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mark.ns.cloudflare.com`
NS	`zelda.ns.cloudflare.com`
		A	2606:4700:50::adf5:3af2^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zelda.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0f2^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`zelda.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20f2^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`zelda.ns.cloudflare.com`
		A	108.162.192.242^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zelda.ns.cloudflare.com`
		A	172.64.32.242^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zelda.ns.cloudflare.com`
		A	173.245.58.242^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zelda.ns.cloudflare.com`
MX	`sritsysteme-de0e.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca27::^{🇩🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-beup281cu00100.inbound.protection.outlook.com`
		A	2a01:111:f403:ca2d::^{🇩🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-fr5p281cu00500.inbound.protection.outlook.com`
		A	2a01:111:f403:ca2d::1^{🇩🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-fr4p281cu03101.inbound.protection.outlook.com`
		A	2a01:111:f403:ca2d::2^{🇩🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-fr6p281cu00202.inbound.protection.outlook.com`
		A	52.101.168.0^{🇩🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-beup281cu00100.inbound.protection.outlook.com`
		A	52.101.170.0^{🇩🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-fr5p281cu00500.inbound.protection.outlook.com`
		A	52.101.170.1^{🇩🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-fr4p281cu03101.inbound.protection.outlook.com`
		A	52.101.170.2^{🇩🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-fr6p281cu00202.inbound.protection.outlook.com`
TXT	`MS=ms46136433`
TXT	`v=spf1 a mx include:spf.protection.outlook.com include:spf-de.emailsignatures...`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.51.179, 172.67.183.146
		IPv6	2606:4700:3031::6815:33b3, 2606:4700:3033::ac43:b792
SOA	`mark.ns.cloudflare.com`dns@cloudflare.com serial=2398815947

`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=1773553752

Previously MX for

sr-itsysteme.de

Same first word

sr-itsysteme.de

DNS History

22 records (7 active, 15 former)

●NSmark.ns.cloudflare.com2026-02-15 → 2026-03-24 · 3 obs

○ 2017-04-19 09:51:38
● 2026-02-15 08:17:54
● 2026-03-24 08:57:00

○NSns1.sr-itsysteme.de2015-07-24 → 2017-04-19 · 5 obs

○ 2008-07-09 11:39:30
● 2015-07-24 13:32:48
● 2017-04-19 09:51:38
○ 2026-02-15 08:17:54
○ 2026-03-24 08:57:00

○NSns1.sr-webservices.de2008-07-09 → 2008-07-09 · 3 obs

● 2008-07-09 11:39:30
○ 2015-07-24 13:32:48
○ 2026-03-24 08:57:00

○NSns2.sr-itsysteme.de2015-07-24 → 2017-04-19 · 5 obs

○ 2008-07-09 11:39:30
● 2015-07-24 13:32:48
● 2017-04-19 09:51:38
○ 2026-02-15 08:17:54
○ 2026-03-24 08:57:00

○NSns2.sr-webservices.de2008-07-09 → 2008-07-09 · 3 obs

● 2008-07-09 11:39:30
○ 2015-07-24 13:32:48
○ 2026-03-24 08:57:00

●NSzelda.ns.cloudflare.com2026-02-15 → 2026-03-24 · 3 obs

○ 2017-04-19 09:51:38
● 2026-02-15 08:17:54
● 2026-03-24 08:57:00

○MXmx.specialcloud.de2015-07-24 → 2017-04-19 · 5 obs

○ 2008-07-09 11:39:30
● 2015-07-24 13:32:48
● 2017-04-19 09:51:38
○ 2026-02-15 08:17:54
○ 2026-03-24 08:57:00

○MXspecialcloud.dyndns.info2015-07-24 → 2017-04-19 · 5 obs

○ 2008-07-09 11:39:30
● 2015-07-24 13:32:48
● 2017-04-19 09:51:38
○ 2026-02-15 08:17:54
○ 2026-03-24 08:57:00

○MXsr-itsysteme.de2008-07-09 → 2008-07-09 · 3 obs

● 2008-07-09 11:39:30
○ 2015-07-24 13:32:48
○ 2026-03-24 08:57:00

●MXsritsysteme-de0e.mail.protection.outlook.com2026-02-15 → 2026-03-24 · 3 obs

○ 2017-04-19 09:51:38
● 2026-02-15 08:17:54
● 2026-03-24 08:57:00

●A104.21.51.1792026-02-15 → 2026-03-24 · 6 obs

○ 2017-04-19 09:51:38
● 2026-02-15 08:17:54
● 2026-02-28 12:33:14
○ 2026-03-03 06:44:00
● 2026-03-23 09:16:24
● 2026-03-24 08:57:00

●A172.67.183.1462026-02-15 → 2026-03-24 · 6 obs

○ 2017-04-19 09:51:38
● 2026-02-15 08:17:54
● 2026-02-28 12:33:14
○ 2026-03-03 06:44:00
● 2026-03-23 09:16:24
● 2026-03-24 08:57:00

○A188.114.96.02026-03-03 → 2026-03-03 · 4 obs

○ 2026-02-28 12:33:14
● 2026-03-03 06:44:00
○ 2026-03-23 09:16:24
○ 2026-03-24 08:57:00

○A188.114.97.02026-03-03 → 2026-03-03 · 4 obs

○ 2026-02-28 12:33:14
● 2026-03-03 06:44:00
○ 2026-03-23 09:16:24
○ 2026-03-24 08:57:00

●A2606:4700:3031::6815:33b32026-02-15 → 2026-03-24 · 6 obs

○ 2017-04-19 09:51:38
● 2026-02-15 08:17:54
● 2026-02-28 12:33:14
○ 2026-03-03 06:44:00
● 2026-03-23 09:16:24
● 2026-03-24 08:57:00

●A2606:4700:3033::ac43:b7922026-02-15 → 2026-03-24 · 6 obs

○ 2017-04-19 09:51:38
● 2026-02-15 08:17:54
● 2026-02-28 12:33:14
○ 2026-03-03 06:44:00
● 2026-03-23 09:16:24
● 2026-03-24 08:57:00

○A2a06:98c1:3120::2026-03-03 → 2026-03-03 · 4 obs

○ 2026-02-28 12:33:14
● 2026-03-03 06:44:00
○ 2026-03-23 09:16:24
○ 2026-03-24 08:57:00

○A2a06:98c1:3121::2026-03-03 → 2026-03-03 · 4 obs

○ 2026-02-28 12:33:14
● 2026-03-03 06:44:00
○ 2026-03-23 09:16:24
○ 2026-03-24 08:57:00

○A62.138.1.1762017-04-19 → 2017-04-19 · 4 obs

○ 2016-09-23 18:01:56
● 2017-04-19 09:51:38
○ 2026-02-15 08:17:54
○ 2026-03-24 08:57:00

○A62.75.166.322015-07-24 → 2016-09-23 · 5 obs

○ 2008-07-09 11:39:30
● 2015-07-24 13:32:48
● 2016-09-23 18:01:56
○ 2017-04-19 09:51:38
○ 2026-03-24 08:57:00

○A67.23.247.1642015-07-24 → 2015-07-24 · 4 obs

○ 2008-07-09 11:39:30
● 2015-07-24 13:32:48
○ 2026-02-15 08:17:54
○ 2026-03-24 08:57:00

○A85.214.46.602008-07-09 → 2008-07-09 · 3 obs

● 2008-07-09 11:39:30
○ 2015-07-24 13:32:48
○ 2026-03-24 08:57:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	f.nic.de, a.nic.de, z.nic.de	-
sr-itsysteme.de	mark.ns.cloudflare.com, zelda.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.130

NS records: mark.ns.cloudflare.com, zelda.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 816ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.51.179, 172.67.183.146`
AAAA	2	`2606:4700:3031::6815:33b3, 2606:4700:3033::ac43:b792`
NS	2	`mark.ns.cloudflare.com, zelda.ns.cloudflare.com`
MX	1	`sritsysteme-de0e.mail.protection.outlook`
TXT	2	`MS=ms46136433, v=spf1 a mx include:spf.protection.outlo`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`mark.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

sr-itsysteme.de refers to four IP numbers: 2606:4700:3031::6815:33b3, 2606:4700:3033::ac43:b792, 104.21.51.179 and 172.67.183.146.

Other host names, for instance vcaz.net, www-multivarka2.top, sneakworks.com, www.limblab.com and pop.gzqnzyz.com share IP numbers with sr-itsysteme.de.

Name Servers

sr-itsysteme.de's delegation uses two name servers: mark.ns.cloudflare.com and zelda.ns.cloudflare.com.

sr-itsysteme.de uses the same name server setup as other domains, such as robertafish.com, swierszczyk.pl, bingel.pl, cindyksproles.com and perfect.is.

sr-itsysteme.de at least partially shares name servers with other domains, including diplomanruss.com, keep-smile.com.cn, xgsdyzx.com, colibrifloraldesign.com and techfleece.com.

These name servers are often used with princess.ns.cloudflare.com and arvind.ns.cloudflare.com.

Host names with six IP numbers:

mark.ns.cloudflare.com points to 2606:4700:58::adf5:3b82, 2803:f800:50::6ca2:c182, 2a06:98c1:50::ac40:2182, 108.162.193.130, 172.64.33.130 and 173.245.59.130.

zelda.ns.cloudflare.com points to 2606:4700:50::adf5:3af2, 2803:f800:50::6ca2:c0f2, 2a06:98c1:50::ac40:20f2, 108.162.192.242, 172.64.32.242 and 173.245.58.242.

Mail Servers

A single mail server handles sr-itsysteme.de, sritsysteme-de0e.mail.protection.outlook.com.

Host sritsysteme-de0e.mail.protection.outlook.com points to eight IPs: 2a01:111:f403:ca27::, 2a01:111:f403:ca2d::, 2a01:111:f403:ca2d::1, 2a01:111:f403:ca2d::2, 52.101.168.0, 52.101.170.0, 52.101.170.1 and 52.101.170.2.

sr-itsysteme.de - robtex.com

sr-itsysteme.de

de

Previously MX for

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`sr-itsysteme.de`

`de`