`firstclass-haeuser.de`

DNSSEC	⚠️ Not signed
NS	`ns1123.ui-dns.biz` ⭐
		A	2001:8d8:fe:53:0:d9a0:517b:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1123.ui-dns.biz`
		A	217.160.81.123^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1123.ui-dns.biz`
NS	`ns1123.ui-dns.com`
		A	2001:8d8:fe:53:0:d9a0:527b:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1123.ui-dns.com`
		A	217.160.82.123^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1123.ui-dns.com`
NS	`ns1123.ui-dns.de`
		A	2607:f1c0:fe:53:185:132:32:123^{🇺🇸 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	`ns1123.ui-dns.de`
		A	217.160.80.123^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1123.ui-dns.de`
NS	`ns1123.ui-dns.org`
		A	2001:8d8:fe:53:0:d9a0:537b:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1123.ui-dns.org`
		A	217.160.83.123^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1123.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.perfora.net include:_spf-eu.ionos.com include:_spf.kunden...`
SOA	`ns1123.ui-dns.biz`hostmaster@1und1.de 2017-04-20 #24

`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

DNS History

13 records (6 active, 7 former)

●NSns1123.ui-dns.biz2020-02-20 → 2026-03-17 · 3 obs

○ 2017-01-05 17:35:28
● 2020-02-20 03:38:22
● 2026-03-17 20:17:32

●NSns1123.ui-dns.com2020-02-20 → 2026-03-17 · 3 obs

○ 2017-01-05 17:35:28
● 2020-02-20 03:38:22
● 2026-03-17 20:17:32

●NSns1123.ui-dns.de2020-02-20 → 2026-03-17 · 3 obs

○ 2017-01-05 17:35:28
● 2020-02-20 03:38:22
● 2026-03-17 20:17:32

●NSns1123.ui-dns.org2020-02-20 → 2026-03-17 · 3 obs

○ 2017-01-05 17:35:28
● 2020-02-20 03:38:22
● 2026-03-17 20:17:32

○NSns65.1und1.de2015-08-14 → 2017-01-05 · 4 obs

● 2015-08-14 18:44:52
● 2017-01-05 17:35:28
○ 2020-02-20 03:38:22
○ 2026-03-17 20:17:32

○NSns66.1und1.de2015-08-14 → 2017-01-05 · 4 obs

● 2015-08-14 18:44:52
● 2017-01-05 17:35:28
○ 2020-02-20 03:38:22
○ 2026-03-17 20:17:32

●MXmx00.ionos.de2026-03-17 → 2026-03-17 · 2 obs

○ 2020-02-20 03:38:22
● 2026-03-17 20:17:32

○MXmx00.kundenserver.de2015-08-14 → 2020-02-20 · 3 obs

● 2015-08-14 18:44:52
● 2020-02-20 03:38:22
○ 2026-03-17 20:17:32

●MXmx01.ionos.de2026-03-17 → 2026-03-17 · 2 obs

○ 2020-02-20 03:38:22
● 2026-03-17 20:17:32

○MXmx01.kundenserver.de2015-08-14 → 2020-02-20 · 3 obs

● 2015-08-14 18:44:52
● 2020-02-20 03:38:22
○ 2026-03-17 20:17:32

○A217.160.0.62020-02-20 → 2020-02-20 · 3 obs

○ 2017-01-05 17:35:28
● 2020-02-20 03:38:22
○ 2026-03-17 20:17:32

○A217.160.117.1522015-08-14 → 2016-03-25 · 4 obs

● 2015-08-14 18:44:52
● 2016-03-25 23:29:38
○ 2017-01-05 17:35:28
○ 2026-03-17 20:17:32

○A217.160.233.2312017-01-05 → 2017-01-05 · 4 obs

○ 2016-03-25 23:29:38
● 2017-01-05 17:35:28
○ 2020-02-20 03:38:22
○ 2026-03-17 20:17:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
firstclass-haeuser.de	ns1123.ui-dns.biz, ns1123.ui-dns.de, ns1123.ui-dns.org, ns1123.ui-dns.com	-

✅ Authoritative Response

Server: 217.160.81.123

NS records: ns1123.ui-dns.biz, ns1123.ui-dns.de, ns1123.ui-dns.org, ns1123.ui-dns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for firstclass-haeuser.de (unsigned zone)

⏱️ Timing

Total: 824ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	4	`ns1123.ui-dns.org, ns1123.ui-dns.de...`
MX	2	`mx00.ionos.de (pri: 10), mx01.ionos.de (pri: 10)`
TXT	1	`v=spf1 include:_spf.perfora.net include:`
SOA	1	`ns1123.ui-dns.biz hostmaster.1und1.de`

Analysis

Name Servers

firstclass-haeuser.de is delegated to four name servers: ns1123.ui-dns.biz, ns1123.ui-dns.com, ns1123.ui-dns.de and ns1123.ui-dns.org.

firstclass-haeuser.de shares name servers with other domains at least partially, for example wrehde.eu, mulberryschool.net, remax-md.de, azeno.de and sofimatic.com.

these name servers are commonly paired with ns1059.ui-dns.org, ns1066.ui-dns.com, ns1034.ui-dns.de, ns1113.ui-dns.org, ns1052.ui-dns.org, ns1070.ui-dns.biz and ns1065.ui-dns.de.

Host names with two IP numbers:

ns1123.ui-dns.biz points to: 2001:8d8:fe:53:0:d9a0:517b:100 and 217.160.81.123

ns1123.ui-dns.com points to: 2001:8d8:fe:53:0:d9a0:527b:100 and 217.160.82.123

ns1123.ui-dns.de points to: 2607:f1c0:fe:53:185:132:32:123 and 217.160.80.123

ns1123.ui-dns.org points to: 2001:8d8:fe:53:0:d9a0:537b:100 and 217.160.83.123

Mail Servers

Two mail servers mx00.ionos.de and mx01.ionos.de handle firstclass-haeuser.de.

firstclass-haeuser.de shares the same mail server setup as other domains, for instance summa.de, parzifal.de, powervac.eu, fotomac.de and mail.rebaro.net.

Host names with one IP number:

mx00.ionos.de points to: 212.227.15.41.

mx01.ionos.de points to: 217.72.192.67.

firstclass-haeuser.de - robtex.com