4sys.net - dns.ninja

`4sys.net`

DNSSEC	⚠️ Not signed
A	217.160.231.143^{🇩🇪 IONOS-AS217.160.0.0/16 IONOS-PA-3}
		PTR	`clienthosting.eu`
NS	`ns1090.ui-dns.com` ⭐
		A	2001:8d8:fe:53:0:d9a0:525a:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1090.ui-dns.com`
		A	217.160.82.90^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1090.ui-dns.com`
NS	`ns1090.ui-dns.biz`
		A	2001:8d8:fe:53:0:d9a0:515a:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1090.ui-dns.biz`
		A	217.160.81.90^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1090.ui-dns.biz`
NS	`ns1090.ui-dns.de`
		A	2607:f1c0:fe:53:185:132:32:90^{🇺🇸 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	`ns1090.ui-dns.de`
		A	185.132.32.90^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`ns1090.ui-dns.de`
NS	`ns1090.ui-dns.org`
		A	2001:8d8:fe:53:0:d9a0:535a:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1090.ui-dns.org`
		A	217.160.83.90^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1090.ui-dns.org`
MX	`mx00.ionos.de` ⭐
		A	212.227.15.41^{🇩🇪 IONOS-AS212.227.0.0/16 IONOS-PA-2}
			PTR	`mx00.kundenserver.de`
MX	`mx01.ionos.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	`ns1090.ui-dns.com`hostmaster@schlund.de 2016-04-19 #3

`net`

	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=1783988022

Same first word

4sys.ru

4sys.de

4sys.fr

4sys.at

4sys.com.br

4sys.org

4sys.net

4sys.nl

4sys.eu

4sys.biz

Similar names

sys4.farm

s4ys.com

ssy4.com

sys4.fr

sys4.org

ss4y.com

sys4.ch

sy4s.com

sys4.cn

4yss.com

4ssy.net

s4ys.de

sys4.ru

yss4.com

sys4.email

sys4.net

sys4.com

4ssy.com

sys4.eu

sys4.de

DNS History

12 records (7 active, 5 former)

○NSns10.schlund.de2015-08-03 → 2016-07-21 · 4 obs

● 2015-08-03 19:42:42
● 2016-07-21 05:01:42
○ 2020-02-12 15:58:46
○ 2026-07-14 00:42:12

●NSns1090.ui-dns.biz2020-02-12 → 2026-07-14 · 3 obs

○ 2016-07-21 05:01:42
● 2020-02-12 15:58:46
● 2026-07-14 00:42:12

●NSns1090.ui-dns.com2020-02-12 → 2026-07-14 · 3 obs

○ 2016-07-21 05:01:42
● 2020-02-12 15:58:46
● 2026-07-14 00:42:12

●NSns1090.ui-dns.de2020-02-12 → 2026-07-14 · 3 obs

○ 2016-07-21 05:01:42
● 2020-02-12 15:58:46
● 2026-07-14 00:42:12

●NSns1090.ui-dns.org2020-02-12 → 2026-07-14 · 3 obs

○ 2016-07-21 05:01:42
● 2020-02-12 15:58:46
● 2026-07-14 00:42:12

○NSns9.schlund.de2015-08-03 → 2016-07-21 · 4 obs

● 2015-08-03 19:42:42
● 2016-07-21 05:01:42
○ 2020-02-12 15:58:46
○ 2026-07-14 00:42:12

●MXmx00.ionos.de2026-02-16 → 2026-07-14 · 3 obs

○ 2020-02-12 15:58:46
● 2026-02-16 21:20:28
● 2026-07-14 00:42:12

○MXmx00.schlund.de2015-08-03 → 2020-02-12 · 4 obs

● 2015-08-03 19:42:42
● 2020-02-12 15:58:46
○ 2026-02-16 21:20:28
○ 2026-07-14 00:42:12

●MXmx01.ionos.de2026-02-16 → 2026-07-14 · 3 obs

○ 2020-02-12 15:58:46
● 2026-02-16 21:20:28
● 2026-07-14 00:42:12

○MXmx01.schlund.de2015-08-03 → 2020-02-12 · 4 obs

● 2015-08-03 19:42:42
● 2020-02-12 15:58:46
○ 2026-02-16 21:20:28
○ 2026-07-14 00:42:12

●A217.160.231.1432016-07-21 → 2026-07-14 · 3 obs

○ 2016-03-19 20:28:28
● 2016-07-21 05:01:42
● 2026-07-14 00:42:12

○A82.165.91.1982015-08-03 → 2016-03-19 · 4 obs

● 2015-08-03 19:42:42
● 2016-03-19 20:28:28
○ 2016-07-21 05:01:42
○ 2026-07-14 00:42:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
4sys.net	ns1090.ui-dns.de, ns1090.ui-dns.biz, ns1090.ui-dns.org, ns1090.ui-dns.com	-

✅ Authoritative Response

Server:217.160.82.90

NS records: ns1090.ui-dns.de, ns1090.ui-dns.biz, ns1090.ui-dns.org, ns1090.ui-dns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 610ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`217.160.231.143`
NS	4	`ns1090.ui-dns.de, ns1090.ui-dns.com...`
MX	2	`mx00.ionos.de (pri: 10), mx01.ionos.de (pri: 10)`
TXT	1	`v=spf1 include:_spf-eu.ionos.com ~all`
SOA	1	`ns1090.ui-dns.com hostmaster.schlund.de`

Analysis

IP Addresses

4sys.net points to a single IP number: 217.160.231.143.

Additional host names — xxim.de, optit.de, dc-star.de and two others — share IP numbers with 4sys.net.

Name Servers

4sys.net has four authoritative name servers: ns1090.ui-dns.biz, ns1090.ui-dns.com, ns1090.ui-dns.de and ns1090.ui-dns.org.

4sys.net has at least partial name server overlap with other domains, such as web-site-optimierung.de, foureme.com, worldtriathlonstore.com and two others.

It is common to find these name servers paired with the name servers ns1125.ui-dns.biz, ns1104.ui-dns.biz, ns1035.ui-dns.de and ns1065.ui-dns.org.

ns1090.ui-dns.biz, ns1090.ui-dns.com, ns1090.ui-dns.de and ns1090.ui-dns.org all point to exactly two IP numbers each: ns1090.ui-dns.biz → 217.160.81.90 and 2001:8d8:fe:53:0:d9a0:515a:100; ns1090.ui-dns.com → 217.160.82.90 and 2001:8d8:fe:53:0:d9a0:525a:100; ns1090.ui-dns.de → 185.132.32.90 and 2607:f1c0:fe:53:185:132:32:90; ns1090.ui-dns.org → 217.160.83.90 and 2001:8d8:fe:53:0:d9a0:535a:100.

Mail Servers

4sys.net has two mail servers: mx00.ionos.de and mx01.ionos.de.

4sys.net shares the same mail server setup as other domains, including nexto.de, devco.de, ralfchristophkaiser.com and two others.

mx00.ionos.de directs to 212.227.15.41 and mx01.ionos.de directs to 217.72.192.67; each host name points to exactly one IP number.