`t-bu.de`

DNSSEC	⚠️ Not signed
A	2a01:239:242:6e00::1^{🇩🇪 IONOS-AS2a01:239::/32 IONOS SE ber.de}
A	87.106.141.232^{🇩🇪 IONOS-AS87.106.141.0/24 IONOS SE ber.de}
NS	`hydrogen.ns.hetzner.com` ⭐
		A	2a01:4f8:0:1::add:1098^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`hydrogen.ns.hetzner.com`
		A	213.133.100.98^{🇩🇪 Hetzner213.133.96.0/19 HETZNER-RZ-NBG-BLK1}
			PTR	`hydrogen.ns.hetzner.com`
NS	`helium.ns.hetzner.de`
		A	2001:67c:192c::add:5^{🇩🇪 NORIS-NETWORK2001:67c:192c::/48}
			PTR	`helium.ns.hetzner.de`
		A	193.47.99.5^{🇩🇪 NORIS-NETWORK193.47.99.0/24}
			PTR	`helium.ns.hetzner.de`
NS	`oxygen.ns.hetzner.com`
		A	2a01:4f8:0:1::add:2992^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`oxygen.ns.hetzner.com`
		A	88.198.229.192^{🇩🇪 Hetzner88.198.0.0/16 HETZNER-RZ-NBG-BLK4}
			PTR	`oxygen.ns.hetzner.com`
MX	`smtpin.rzone.de` ⭐
		A	2a01:238:20a:202:50f0::1097^{🇩🇪 STRATO2a01:238:20a::/48 Strato AG}
		A	81.169.145.97^{🇩🇪 STRATO81.169.144.0/22 AG}
			PTR	`smtpin.rzone.de`
TXT	`v=spf1 redirect=_spf.strato.com`
SOA	`hydrogen.ns.hetzner.com`dns@hetzner.com 2026-04-18 #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=1778638768

Subdomains

mail.t-bu.de

Same first word

t-bu.blogspot.com

Similar names

u-bt.com

tu-b.com

t-ub.cn

b-ut.de

b-tu.org

tb-u.de

b-tu.com

bu-t.com

bt-u.com

ub-t.com

b-tu.de

bu-t.co.jp

b-tu.info

t-ub.eu

t-ub.info

t-ub.com

t-ub.net

u-bt.ro

b-ut.ir

b-tu.biz

t-ub.de

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
t-bu.de	oxygen.ns.hetzner.com, helium.ns.hetzner.de, hydrogen.ns.hetzner.com	-

✅ Authoritative Response

Server:88.198.229.192

NS records: oxygen.ns.hetzner.com, helium.ns.hetzner.de, hydrogen.ns.hetzner.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for t-bu.de (unsigned zone)

⏱️ Timing

Total: 1064ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`87.106.141.232`
AAAA	1	`2a01:239:242:6e00::1`
NS	3	`oxygen.ns.hetzner.com, helium.ns.hetzner.de...`
MX	1	`smtpin.rzone.de (pri: 20)`
TXT	1	`v=spf1 redirect=_spf.strato.com`
SOA	1	`hydrogen.ns.hetzner.com dns.hetzner.com`

Analysis

Hierarchy

t-bu.de is the parent of mail.t-bu.de.

IP Addresses

t-bu.de points to two IPs: 2a01:239:242:6e00::1 and 87.106.141.232.

Other host names, such as autogio.free2air.net and mail.t-bu.de, share IP numbers with t-bu.de.

Name Servers

t-bu.de is delegated to three name servers: hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com and helium.ns.hetzner.de.

t-bu.de at least partially shares name servers with other domains, including ifage.de, thalgo.dk, preventgroup.com, baumaschinen-mieten.de and spreewaldidyll-raddusch.de.

these name servers are commonly used together with ns1.first-ns.de, robotns3.second-ns.com and robotns2.second-ns.de.

Host names with two IP numbers:

hydrogen.ns.hetzner.com points to: 2a01:4f8:0:1::add:1098 and 213.133.100.98

oxygen.ns.hetzner.com points to: 2a01:4f8:0:1::add:2992 and 88.198.229.192

helium.ns.hetzner.de points to: 2001:67c:192c::add:5 and 193.47.99.5

Mail Servers

t-bu.de is handled by a single mail server, smtpin.rzone.de.

t-bu.de shares its mail server setup with other domains, including walcheren.net, mibant.de, server1.glkh.de, felix-o.de and sttu.de.

smtpin.rzone.de points to two IPs: 2a01:238:20a:202:50f0::1097 and 81.169.145.97.

t-bu.de - robtex.com

t-bu.de

de