Domain report: mhn.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, 11 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 2026091323 · primary dns1.lrz.de

Found

Primary (MNAME): dns1.lrz.de
Contact (RNAME): hostmaster.lrz.de
Serial: 2026091323
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)	2026091323
dns1.lrz.de (2001:4ca0:0:100:0:53:1:1)	2026091323
dns2.lrz.bayern (141.40.9.211)	2026091323
dns2.lrz.bayern (2001:4ca0:0:100:0:53:1:2)	2026091323
dns3.lrz.eu (78.128.211.180)	2026091323
dns3.lrz.eu (2001:718:1:1f:50:56ff:feee:180)	2026091323

Checks

✓ Serial 2026091323 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 2026091323 follows the YYYYMMDDnn convention (2026-09-13).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 0 iterations, 0-byte salt
Signatures valid until: 10 December 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
4926	ECDSAP256SHA256 (13)	SHA256 79F559530B3D80BA…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
4767	ZSK (256)	ECDSAP256SHA256 (13)
4926	KSK (257)	ECDSAP256SHA256 (13)

Checks

✓ Signed and validated #27

The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
✓ DS matches a key #28

The DS record at the parent matches a key in the zone: key tag 4926 (SHA256).
✓ Modern algorithms #29

Key algorithms: ECDSAP256SHA256 (13).
✓ Signatures valid until 2026-12-10 #30

The earliest DNSKEY/SOA signature expires at 2026-12-10 14:02 UTC.
✓ NSEC3 as recommended #31

The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

info

8 records at the apex

Found

Read from: 129.187.19.183:53

Type	Value	TTL
SOA	dns1.lrz.de. hostmaster.lrz.de. 2026091323 21600 1800 3600000 86400	86400
NS	dns3.lrz.eu.	86400
NS	dns2.lrz.bayern.	86400
NS	dns1.lrz.de.	86400
TXT	"HARICA-zvXTQsuK2g9pQyrfU0T"	86400
TXT	"HARICA-wlPG7vhbeVXt4AmogD9"	86400
TXT	"HARICA-9X0ZTvyp3RVjyEN1Ow7"	86400
TXT	"HARICA-nnyNWBR1g0VBPIr3bWD"	86400

Checks

✓ TTLs within range #32

TTLs: 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