`4--u.de`

DNSSEC	⚠️ Not signed
A	88.217.225.148^{🇩🇪 MNET-AS88.217.0.0/16 DE-MNET-20051123 Germany}
		PTR	`mail.ktsgmbh.de`
NS	`ns1.first-ns.de` ⭐
		A	2a01:4f8:0:a101::a:1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`ns1.first-ns.de`
		A	213.239.242.238^{🇩🇪 Hetzner213.239.192.0/18 HETZNER-RZ-NBG-BLK2}
			PTR	`ns1.first-ns.de`
NS	`robotns2.second-ns.de`
		A	2a01:4f8:0:1::5ddc:2^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`robotns2.second-ns.de`
		A	213.133.100.103^{🇩🇪 Hetzner213.133.96.0/19 HETZNER-RZ-NBG-BLK1}
			PTR	`robotns2.second-ns.de`
NS	`robotns3.second-ns.com`
		A	2001:67c:192c::add:a3^{🇩🇪 NORIS-NETWORK2001:67c:192c::/48}
			PTR	`robotns3.second-ns.com`
		A	193.47.99.3^{🇩🇪 NORIS-NETWORK193.47.99.0/24}
			PTR	`robotns3.second-ns.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c0b::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bj-in-f27.1e100.net`
		A	172.253.115.26^{🇺🇸 Google172.253.115.0/24}
			PTR	`bg-in-f26.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.27^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f27.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:4013:c1e::1a^{🇳🇱 Google2a00:1450:4013::/48}
			PTR	`yugrqzs-in-f26.1e100.net`
		A	192.178.213.27^{🇺🇸 Google192.178.213.0/24}
			PTR	`yugrqzs-in-f27.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1a^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f26.1e100.net`
		A	192.178.223.27^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f27.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4025:c01::1a^{🇵🇱 Google2a00:1450:4025::/48}
			PTR	`rd-in-f26.1e100.net`
		A	142.250.147.27^{🇺🇸 Google142.250.147.0/24}
			PTR	`rd-in-f27.1e100.net`
TXT	`google-site-verification=iZcfGN1CuUM5EMk-uNR_FoNiKRvM72qexTHk7IBbl2Q`
SOA	`ns1.first-ns.de`dns@hetzner.com 2026-03-05 #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=1776077666

Same first word

4--u.de

DNS History

11 records (9 active, 2 former)

●NSns1.first-ns.de2015-08-27 → 2026-04-13 · 2 obs

● 2015-08-27 13:13:34
● 2026-04-13 11:24:40

●NSrobotns2.second-ns.de2015-08-27 → 2026-04-13 · 2 obs

● 2015-08-27 13:13:34
● 2026-04-13 11:24:40

●NSrobotns3.second-ns.com2015-08-27 → 2026-04-13 · 2 obs

● 2015-08-27 13:13:34
● 2026-04-13 11:24:40

●MXalt1.aspmx.l.google.com2026-04-13 → 2026-04-13 · 2 obs

○ 2017-06-28 11:10:50
● 2026-04-13 11:24:40

●MXalt2.aspmx.l.google.com2026-04-13 → 2026-04-13 · 2 obs

○ 2017-06-28 11:10:50
● 2026-04-13 11:24:40

●MXalt3.aspmx.l.google.com2026-04-13 → 2026-04-13 · 2 obs

○ 2017-06-28 11:10:50
● 2026-04-13 11:24:40

●MXalt4.aspmx.l.google.com2026-04-13 → 2026-04-13 · 2 obs

○ 2017-06-28 11:10:50
● 2026-04-13 11:24:40

●MXaspmx.l.google.com2026-04-13 → 2026-04-13 · 2 obs

○ 2017-06-28 11:10:50
● 2026-04-13 11:24:40

○MXmail.4--u.de2015-08-27 → 2017-06-28 · 3 obs

● 2015-08-27 13:13:34
● 2017-06-28 11:10:50
○ 2026-04-13 11:24:40

○A88.198.196.702015-08-27 → 2016-03-18 · 4 obs

● 2015-08-27 13:13:34
● 2016-03-18 17:31:12
○ 2016-06-25 10:44:50
○ 2026-04-13 11:24:40

●A88.217.225.1482016-06-25 → 2026-04-13 · 3 obs

○ 2016-03-18 17:31:12
● 2016-06-25 10:44:50
● 2026-04-13 11:24:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	f.nic.de, z.nic.de, a.nic.de	-
4--u.de	robotns3.second-ns.com, ns1.first-ns.de, robotns2.second-ns.de	-

✅ Authoritative Response

Server:193.47.99.3

NS records: robotns3.second-ns.com, ns1.first-ns.de, robotns2.second-ns.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 4--u.de (unsigned zone)

⏱️ Timing

Total: 1035ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`88.217.225.148`
NS	3	`ns1.first-ns.de, robotns2.second-ns.de...`
MX	5	`alt3.aspmx.l.google.com (pri: 10), alt4.aspmx.l.google.com (pri: 10)...`
TXT	1	`google-site-verification=iZcfGN1CuUM5EMk`
SOA	1	`ns1.first-ns.de dns.hetzner.com`

Analysis

IP Addresses

4--u.de resolves to a single IP: 88.217.225.148.

Other host names including carfactory.de, mail.ktsgmbh.de and mail.carfactory.de share IP numbers with 4--u.de.

Name Servers

4--u.de delegates to three name servers: robotns3.second-ns.com, ns1.first-ns.de and robotns2.second-ns.de.

4--u.de shares some name servers with other domains, for example daniel-raps.de, stockmann-und-partner.de, aejf.de, orsuisse.de and skinnypov.com.

These name servers are often used together with hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com and helium.ns.hetzner.de.

Host names with two IP numbers:

robotns3.second-ns.com: 2001:67c:192c::add:a3 and 193.47.99.3

ns1.first-ns.de: 2a01:4f8:0:a101::a:1 and 213.239.242.238

robotns2.second-ns.de: 2a01:4f8:0:1::5ddc:2 and 213.133.100.103

Mail Servers

4--u.de is handled by five mail servers: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and alt4.aspmx.l.google.com.

4--u.de shares some mail servers with other domains, at least partially; for instance sectre.com, modog.ro, nesivos.com, tokachip.com and vvg.me.