4sys.de - dns.ninja

`4sys.de`

DNSSEC	⚠️ Not signed
A	217.160.231.143^{🇩🇪 IONOS-AS217.160.0.0/16 IONOS-PA-3}
		PTR	`clienthosting.eu`
NS	`ns1051.ui-dns.de` ⭐
		A	2607:f1c0:fe:53:185:132:32:51^{🇺🇸 IONOS-ANYCAST2607:f1c0:fe::/47 AS8560 global anycast services (more specific) 1&1 IONOS Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US}
			PTR	`ns1051.ui-dns.de`
		A	185.132.32.51^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`ns1051.ui-dns.de`
NS	`ns1051.ui-dns.biz`
		A	2607:f1c0:fe:53:185:132:33:51^{🇺🇸 IONOS-ANYCAST2607:f1c0:fe::/47 AS8560 global anycast services (more specific) 1&1 IONOS Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US}
			PTR	`ns1051.ui-dns.biz`
		A	185.132.33.51^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`ns1051.ui-dns.biz`
NS	`ns1051.ui-dns.com`
		A	2607:f1c0:fe:53:185:132:34:51^{🇺🇸 IONOS-ANYCAST2607:f1c0:fe::/47 AS8560 global anycast services (more specific) 1&1 IONOS Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US}
			PTR	`ns1051.ui-dns.com`
		A	185.132.34.51^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`ns1051.ui-dns.com`
NS	`ns1051.ui-dns.org`
		A	2607:f1c0:fe:53:185:132:35:51^{🇺🇸 IONOS-ANYCAST2607:f1c0:fe::/47 AS8560 global anycast services (more specific) 1&1 IONOS Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US}
			PTR	`ns1051.ui-dns.org`
		A	185.132.35.51^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
MX	`mx00.ionos.de` ⭐
		A	212.227.15.41^{🇩🇪 IONOS-AS212.227.0.0/16 IONOS-PA-2}
			PTR	`mx00.kundenserver.de`
		A	212.227.15.171^{🇩🇪 IONOS-AS212.227.0.0/16 IONOS-PA-2}
			PTR	`mx00.kundenserver.de`
MX	`mx01.ionos.de` ⭐
		A	212.227.15.188^{🇩🇪 IONOS-AS212.227.0.0/16 IONOS-PA-2}
			PTR	`mx01.kundenserver.de`
		A	217.72.192.67^{🇩🇪 IONOS-AS217.72.192.0/20 Web.de}
			PTR	`mx01.kundenserver.de`
TXT	`v=spf1 include:_spf-eu.ionos.com ~all`
SOA	`ns1051.ui-dns.de`hostmaster@schlund.de 2016-04-19 #3

`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=1785207320

Same first word

4sys.nl

4sys.eu

4sys.biz

4sys.ru

4sys.de

4sys.fr

4sys.at

4sys.com.br

4sys.org

4sys.net

Similar names

4ssy.net

s4ys.de

sys4.ru

yss4.com

sys4.email

sys4.net

sys4.com

4ssy.com

sys4.eu

sys4.de

sys4.farm

s4ys.com

sys4.me

ssy4.com

sys4.fr

sys4.org

ss4y.com

sys4.ch

sy4s.com

sys4.cn

4yss.com

DNS History

12 records (7 active, 5 former)

○NSns10.schlund.de2015-08-11 → 2016-09-11 · 4 obs

● 2015-08-11 01:55:14
● 2016-09-11 02:57:28
○ 2026-02-27 16:15:12
○ 2026-07-28 02:58:12

●NSns1051.ui-dns.biz2026-02-27 → 2026-07-28 · 3 obs

○ 2016-09-11 02:57:28
● 2026-02-27 16:15:12
● 2026-07-28 02:58:12

●NSns1051.ui-dns.com2026-02-27 → 2026-07-28 · 3 obs

○ 2016-09-11 02:57:28
● 2026-02-27 16:15:12
● 2026-07-28 02:58:12

●NSns1051.ui-dns.de2026-02-27 → 2026-07-28 · 3 obs

○ 2016-09-11 02:57:28
● 2026-02-27 16:15:12
● 2026-07-28 02:58:12

●NSns1051.ui-dns.org2026-02-27 → 2026-07-28 · 3 obs

○ 2016-09-11 02:57:28
● 2026-02-27 16:15:12
● 2026-07-28 02:58:12

○NSns9.schlund.de2015-08-11 → 2016-09-11 · 4 obs

● 2015-08-11 01:55:14
● 2016-09-11 02:57:28
○ 2026-02-27 16:15:12
○ 2026-07-28 02:58:12

●MXmx00.ionos.de2026-02-27 → 2026-07-28 · 3 obs

○ 2016-09-11 02:57:28
● 2026-02-27 16:15:12
● 2026-07-28 02:58:12

○MXmx00.schlund.de2015-08-11 → 2016-09-11 · 4 obs

● 2015-08-11 01:55:14
● 2016-09-11 02:57:28
○ 2026-02-27 16:15:12
○ 2026-07-28 02:58:12

●MXmx01.ionos.de2026-02-27 → 2026-07-28 · 3 obs

○ 2016-09-11 02:57:28
● 2026-02-27 16:15:12
● 2026-07-28 02:58:12

○MXmx01.schlund.de2015-08-11 → 2016-09-11 · 4 obs

● 2015-08-11 01:55:14
● 2016-09-11 02:57:28
○ 2026-02-27 16:15:12
○ 2026-07-28 02:58:12

●A217.160.231.1432016-09-11 → 2026-07-28 · 3 obs

○ 2016-03-21 17:37:22
● 2016-09-11 02:57:28
● 2026-07-28 02:58:12

○A82.165.91.1982015-08-11 → 2016-03-21 · 4 obs

● 2015-08-11 01:55:14
● 2016-03-21 17:37:22
○ 2016-09-11 02:57:28
○ 2026-07-28 02:58:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
4sys.de	ns1051.ui-dns.biz, ns1051.ui-dns.org, ns1051.ui-dns.de, ns1051.ui-dns.com	-

✅ Authoritative Response

Server:185.132.32.51

NS records: ns1051.ui-dns.biz, ns1051.ui-dns.org, ns1051.ui-dns.de, ns1051.ui-dns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 4sys.de (unsigned zone)

⏱️ Timing

Total: 844ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`217.160.231.143`
NS	4	`ns1051.ui-dns.de, ns1051.ui-dns.com...`
MX	2	`mx01.ionos.de (pri: 10), mx00.ionos.de (pri: 10)`
TXT	1	`v=spf1 include:_spf-eu.ionos.com ~all`
SOA	1	`ns1051.ui-dns.de hostmaster.schlund.de`

Analysis

IP Addresses

4sys.de resolves to just one IP address, 217.160.231.143.

Two other host names, along with xsus.de, 4blue.net and x-asp.net, also share IP numbers with 4sys.de.

Name Servers

The NS records for 4sys.de point to four name servers: ns1051.ui-dns.biz, ns1051.ui-dns.com, ns1051.ui-dns.de and ns1051.ui-dns.org.

The name servers of 4sys.de overlap at least partially with those of other domains — among them lighthousebcc.org, honestu.com, vivireco.com and two more.

These name servers commonly appear alongside the name servers ns1083.ui-dns.de and ns1052.ui-dns.org.

Each of the four hosts ns1051.ui-dns.biz, ns1051.ui-dns.com, ns1051.ui-dns.de and ns1051.ui-dns.org has two IP addresses. ns1051.ui-dns.biz points to 185.132.33.51 and 2607:f1c0:fe:53:185:132:33:51. ns1051.ui-dns.com points to 185.132.34.51 and 2607:f1c0:fe:53:185:132:34:51. ns1051.ui-dns.de points to 185.132.32.51 and 2607:f1c0:fe:53:185:132:32:51. ns1051.ui-dns.org points to 185.132.35.51 and 2607:f1c0:fe:53:185:132:35:51.

Mail Servers

4sys.de is served by two mail servers, mx00.ionos.de and mx01.ionos.de.

Among the domains sharing a mail server setup with 4sys.de are di-r.de, thomas-ibs.de, wwassong.de and two others.

mx00.ionos.de resolves to 212.227.15.41 and 212.227.15.171. Likewise, mx01.ionos.de resolves to 212.227.15.188 and 217.72.192.67 — two IP addresses apiece.