Domain report: unternehmertum.de

Registration

info

.de country-code

Found

TLD: .de (country-code)
ICANN policies apply: no

Checks

i

.de is a country-code TLD (ccTLD)

Country-code TLD: governed by its local registry under national policy, not by an ICANN contract. Registrar accreditation, dispute resolution and RDAP/WHOIS rules are set by the registry.

#1
✓ TLD delegated and signed #2

.de is delegated in the root zone and DNSSEC-signed.
i

Registration data not available

No registration data via RDAP: the registry of .de offers no RDAP service. Many ccTLD registries don't offer RDAP; check the registry's WHOIS instead.

#3

Delegation

pass

dns1.lrz.de, dns2.lrz.bayern, dns3.lrz.eu

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: dns1.lrz.de, dns2.lrz.bayern, dns3.lrz.eu
NS in the zone: dns1.lrz.de, dns2.lrz.bayern, dns3.lrz.eu

Nameserver	Addresses	Network (AS)	Glue
dns1.lrz.de	129.187.19.183 2001:4ca0:0:100:0:53:1:1	AS12816 MWN-AS - Leibniz-Rechenzentrum, DE AS12816 MWN-AS - Leibniz-Rechenzentrum, DE	129.187.19.183 2001:4ca0:0:100:0:53:1:1
dns2.lrz.bayern	141.40.9.211 2001:4ca0:0:100:0:53:1:2	AS12816 MWN-AS - Leibniz-Rechenzentrum, DE AS12816 MWN-AS - Leibniz-Rechenzentrum, DE	-
dns3.lrz.eu	78.128.211.180 2001:718:1:1f:50:56ff:feee:180	AS2852 CESNET2 - CESNET z.s.p.o., CZ AS2852 CESNET2 - CESNET z.s.p.o., CZ	-

Checks

✓ 3 nameservers #6

Delegated to dns1.lrz.de, dns2.lrz.bayern, dns3.lrz.eu.
✓ Parent and zone agree #7

The parent delegation and the zone's NS records list the same nameservers.
✓ No glue needed #8

All nameservers are outside the zone, so no glue records are needed.
✓ All names resolve #9

Every nameserver name has an address and is not an alias.
✓ Nameservers in different networks #10

The nameservers are spread over 3 IPv4 /24s and 2 IPv6 /48s.
✓ 2 autonomous systems #11

The nameservers are spread over: AS12816 (MWN-AS - Leibniz-Rechenzentrum, DE): 4 addresses; AS2852 (CESNET2 - CESNET z.s.p.o., CZ): 2 addresses.
✓ Nameserver names under 3 TLDs #12

Nameserver names use the TLDs .bayern, .de, .eu.
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

Nameservers

warn

6 of 6 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
dns1.lrz.de 129.187.19.183	NOERROR, 12 ms, authoritative	no	yes / yes	refused	9.20.29-1~deb13u1-Debian
dns1.lrz.de 2001:4ca0:0:100:0:53:1:1	NOERROR, 12 ms, authoritative	no	yes / yes	refused	9.20.29-1~deb13u1-Debian
dns2.lrz.bayern 141.40.9.211	NOERROR, 12 ms, authoritative	no	yes / yes	refused	9.20.29-1~deb13u1-Debian
dns2.lrz.bayern 2001:4ca0:0:100:0:53:1:2	NOERROR, 12 ms, authoritative	no	yes / yes	refused	9.20.29-1~deb13u1-Debian
dns3.lrz.eu 78.128.211.180	NOERROR, 8 ms, authoritative	no	yes / yes	refused	9.18.49-1~deb12u2-Debian
dns3.lrz.eu 2001:718:1:1f:50:56ff:feee:180	NOERROR, 8 ms, authoritative	no	yes / yes	refused	9.18.49-1~deb12u2-Debian

Checks

✓ All respond #14

All 6 nameserver addresses answered.
✓ All authoritative #15

Every responding nameserver answers authoritatively for the zone.
✓ No recursion #16

The nameservers do not answer recursive queries for other domains.
!

Software version disclosed

These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: dns1.lrz.de: "9.20.29-1~deb13u1-Debian"; dns2.lrz.bayern: "9.20.29-1~deb13u1-Debian"; dns3.lrz.eu: "9.18.49-1~deb12u2-Debian". Hide or replace the version string.

#17
✓ Zone transfers refused #18

No nameserver allows a zone transfer to the public.
✓ TCP supported #19

All nameservers answer over TCP.
✓ EDNS supported #20

All nameservers support EDNS(0).
✓ Public addresses #21

All nameserver addresses are publicly routable.

SOA

pass

serial 2026092110 · primary dns1.lrz.de

Found

Primary (MNAME): dns1.lrz.de
Contact (RNAME): hostmaster.lrz.de
Serial: 2026092110
Refresh / retry: 21600 s / 1800 s
Expire: 3600000 s
Negative TTL: 86400 s

Serial per nameserver

Nameserver	Serial
dns1.lrz.de (129.187.19.183)	2026092110
dns1.lrz.de (2001:4ca0:0:100:0:53:1:1)	2026092110
dns2.lrz.bayern (141.40.9.211)	2026092110
dns2.lrz.bayern (2001:4ca0:0:100:0:53:1:2)	2026092110
dns3.lrz.eu (78.128.211.180)	2026092110
dns3.lrz.eu (2001:718:1:1f:50:56ff:feee:180)	2026092110

Checks

✓ Serial 2026092110 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 6h, retry 30m, expire 1000h, negative TTL 1d.
✓ Primary is a public nameserver #24

The primary nameserver dns1.lrz.de is one of the listed nameservers.
✓ Contact hostmaster@lrz.de #25

The SOA RNAME hostmaster.lrz.de means hostmaster@lrz.de.
✓ Date-based serial #26

The serial 2026092110 follows the YYYYMMDDnn convention (2026-09-21).

DNSSEC

warn

Not signed

Found

Validated by resolver: no

Checks

!

Not signed

The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.

#27

Records

info

29 records at the apex

Found

Read from: 129.187.19.183:53

Type	Value	TTL
SOA	dns1.lrz.de. hostmaster.lrz.de. 2026092110 21600 1800 3600000 86400	86400
NS	dns2.lrz.bayern.	86400
NS	dns1.lrz.de.	86400
NS	dns3.lrz.eu.	86400
A	64.225.83.76	600
MX	5 ALT1.ASPMX.L.GOOGLE.COM.	3600
MX	10 ALT4.ASPMX.L.GOOGLE.COM.	3600
MX	5 ALT2.ASPMX.L.GOOGLE.COM.	3600
MX	1 ASPMX.L.GOOGLE.COM.	3600
MX	10 ALT3.ASPMX.L.GOOGLE.COM.	3600
TXT	"MS=ms57795170"	3600
TXT	"make-domain-verification=abfd1605-f2de-426b-8e4f-0118aae58675"	3600
TXT	"qk9u3v2d9k48skgci7j3uenpen"	3600
TXT	"airtable-verification=aa9f99137ddc900aa64c67c47a88857c"	3600
TXT	"MS=ms17847041"	3600
TXT	"openai-domain-verification=dv-snmGYWoGQq0V7iyVBh9jxzKU"	3600
TXT	"anthropic-domain-verification-rcgj44=ual3roy4Fx8rgxupj2tCMqVIF"	3600
TXT	"sbg24p05tm0u6lmn8vijfdfgqt"	3600
TXT	"ZOOM_verify_NrUmk7bvSwyfV_08_ydkPw"	3600
TXT	"MS=ms74786293"	3600
TXT	"openai-domain-verification=dv-UI8Tg62C9Zx9dT63Fgr0NyJc"	3600
TXT	"infoblox-domain-mastery=766721d99ed05070e7d6e892493ecb14a2f42f691d821b12367b2feb56e63e6dcf"	3600
TXT	"atlassian-domain-verification=2PHUy61bLfs5Lt1V-quhdQskJjhNkfDxDplxdOlvsrVTnbJCJfIMHwh20zh32T99"	3600
TXT	"v=spf1 ip4:185.197.237.162 include:_spf.elasticemail.com include:_spf.google.com include:_spf.salesforce.com include:servers.mcsv.net include:email.hivebrite.com -all"	3600
TXT	"apple-domain-verification=ZrhOpqWAwnjdUDLS"	3600
TXT	"miro-verification=e2cf7bc1c27cb5fa62eb4d42bfaeb69e13d17255"	3600
TXT	"google-site-verification=HxekdoLnkHDLTAD-KNjIfRydMVT8vemNZ1R7NOOA2yo"	3600
TXT	"notion-domain-verification=4RfcvC4wqi5c7l0ufese2FHeHrelrOeS5XjMqptwZoE"	3600
TXT	"k=rsa;t=s;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCbmGbQMzYeMvxwtNQoXN0waGYaciuKx8mtMh5czguT4EZlJXuCt6V+l56mmt3t68FEX5JJ0q4ijG71BGoFRkl87uJi7LrQt1ZZmZCvrEII0YO4mp8sDLXC8g1aUAoi8TJgxq2MJqCaMyj5kAm3Fdy2tzftPCV/lbdiJqmBnWKjtwIDAQAB"	3600

Checks

✓ TTLs within range #32

TTLs: A 10m, MX 1h, NS 1d.
✓ No CNAME at the apex #33

The zone apex has no CNAME record.
✓ No wildcard #34

Names that don't exist return NXDOMAIN.
i

No CAA records

Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.

#35