sys1.de - dns.ninja

`sys1.de`

DNSSEC	⚠️ Not signed
A	91.213.21.45^{🇩🇪 UUU-TELECOM-AS91.213.21.0/24 HOSTHOUSING-NET via 3U}
		PTR	`server1.sslsecurity.net`
NS	`dns.hoh-dns.de` ⭐
		A	91.213.21.3^{🇩🇪 UUU-TELECOM-AS91.213.21.0/24 HOSTHOUSING-NET via 3U}
			PTR	`3.21.213.91.net.6dc.de`
NS	`dns.hoh-dns.com`
		A	194.13.82.188^{🇩🇪 netcup-AS194.13.80.0/22}
			PTR	`dns.hoh-dns.com`
NS	`dns.hoh-dns.eu`
		A	159.69.121.95^{🇩🇪 Hetzner159.69.0.0/16 HETZNER-DC}
			PTR	`dns.hoh-dns.eu`
MX	`mail.sys1.de` ⭐
		A	91.213.21.45^{🇩🇪 UUU-TELECOM-AS91.213.21.0/24 HOSTHOUSING-NET via 3U}
			PTR	`server1.sslsecurity.net`
TXT	`v=spf1 a mx ~all`
SOA	`dns.hoh-dns.de`dns@hoh-dns.de serial=0

`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=1781072955

Subdomains

mail.sys1.de

Same first word

sys1.com.br

sys1.us

sys1.top

sys1.info

sys1.ovh

sys1.fr

sys1.de

Similar names

1sys.by

1sys.ru

ys1s.net

1sys.net

DNS History

7 records (5 active, 2 former)

●NSdns.hoh-dns.com2026-03-18 → 2026-06-10 · 3 obs

○ 2016-07-20 20:29:10
● 2026-03-18 09:05:40
● 2026-06-10 06:34:18

●NSdns.hoh-dns.de2026-03-18 → 2026-06-10 · 3 obs

○ 2016-07-20 20:29:10
● 2026-03-18 09:05:40
● 2026-06-10 06:34:18

●NSdns.hoh-dns.eu2026-03-18 → 2026-06-10 · 3 obs

○ 2016-07-20 20:29:10
● 2026-03-18 09:05:40
● 2026-06-10 06:34:18

○NSns1.s-dns.de2015-05-20 → 2016-07-20 · 4 obs

● 2015-05-20 15:25:58
● 2016-07-20 20:29:10
○ 2026-03-18 09:05:40
○ 2026-06-10 06:34:18

○NSns2.s-dns.de2015-05-20 → 2016-07-20 · 4 obs

● 2015-05-20 15:25:58
● 2016-07-20 20:29:10
○ 2026-03-18 09:05:40
○ 2026-06-10 06:34:18

●MXmail.sys1.de2015-05-20 → 2026-06-10 · 2 obs

● 2015-05-20 15:25:58
● 2026-06-10 06:34:18

●A91.213.21.452015-05-20 → 2026-06-10 · 2 obs

● 2015-05-20 15:25:58
● 2026-06-10 06:34:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	f.nic.de, z.nic.de, a.nic.de	-
sys1.de	dns.hoh-dns.de, dns.hoh-dns.eu, dns.hoh-dns.com	1 record

✅ Authoritative Response

Server:91.213.21.3

NS records: dns.hoh-dns.de, dns.hoh-dns.eu, dns.hoh-dns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sys1.de (unsigned zone)

⏱️ Timing

Total: 2917ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`91.213.21.45`
NS	3	`dns.hoh-dns.eu, dns.hoh-dns.de...`
MX	1	`mail.sys1.de (pri: 10)`
TXT	1	`v=spf1 a mx ~all`
SOA	1	`dns.hoh-dns.de dns.hoh-dns.de`

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (dns.hoh-dns.de)

Analysis

Hierarchy

mail.sys1.de is a subdomain of sys1.de.

IP Addresses

sys1.de has exactly one IP address — 91.213.21.45.

mail.wd4.de, www.yesfeet.com, mail.mieterinfo.tv plus two other host names have IP numbers in common with sys1.de.

Name Servers

DNS for sys1.de is handled by three authoritative name servers: dns.hoh-dns.com, dns.hoh-dns.de and dns.hoh-dns.eu.

The name servers of sys1.de overlap at least partially with those of other domains — among them atemmeta.com, knabe-it-service.com, buyreg.de and two more.

These name servers commonly appear in combination with the name servers ns1.dnes.de.

dns.hoh-dns.com, dns.hoh-dns.de and dns.hoh-dns.eu all have one IP address each — dns.hoh-dns.com directs to 194.13.82.188, dns.hoh-dns.de directs to 91.213.21.3 and dns.hoh-dns.eu directs to 159.69.121.95.

Mail Servers

sys1.de uses one mail server — mail.sys1.de.

mail.sys1.de has exactly one IP number: 91.213.21.45.