Domain report: hochschule-trier.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

info

dns.fh-trier.de, ns.umwelt-campus.de

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: dns.fh-trier.de, ns.umwelt-campus.de
NS in the zone: dns.fh-trier.de, ns.umwelt-campus.de

Nameserver	Addresses	Network (AS)	Glue
dns.fh-trier.de	143.93.54.7 2001:4c80:64:360::7:0	AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE	143.93.54.7 2001:4c80:64:360::7:0
ns.umwelt-campus.de	143.93.32.2	AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE	143.93.32.2

Checks

i

2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns.fh-trier.de, ns.umwelt-campus.de.

#6
✓ 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 2 IPv4 /24s and 1 IPv6 /48.
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS2857 (RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE): 3 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

#11
i

All nameserver names under .de

All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.

#12
i

Partly IPv6

These nameservers have no IPv6 address: ns.umwelt-campus.de.

#13

Nameservers

warn

3 of 3 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
dns.fh-trier.de 143.93.54.7	NOERROR, 7 ms, authoritative	no	yes / yes	refused	0.0.0
dns.fh-trier.de 2001:4c80:64:360::7:0	NOERROR, 8 ms, authoritative	no	yes / yes	refused	0.0.0
ns.umwelt-campus.de 143.93.32.2	NOERROR, 6 ms, authoritative	no	yes / yes	refused	-

Checks

✓ All respond #14

All 3 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: dns.fh-trier.de: "0.0.0". 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

warn

serial 2026102333 · primary dns.fh-trier.de

Found

Primary (MNAME): dns.fh-trier.de
Contact (RNAME): ip-admin.hochschule-trier.de
Serial: 2026102333
Refresh / retry: 28800 s / 7200 s
Expire: 1209600 s
Negative TTL: 86400 s

Serial per nameserver

Nameserver	Serial
dns.fh-trier.de (143.93.54.7)	2026102333
dns.fh-trier.de (2001:4c80:64:360::7:0)	2026102333
ns.umwelt-campus.de (143.93.32.2)	2026102333

Checks

✓ Serial 2026102333 everywhere #22

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

SOA refresh 8h, retry 2h, expire 14d, negative TTL 1d.
✓ Primary is a public nameserver #24

The primary nameserver dns.fh-trier.de is one of the listed nameservers.
✓ Contact ip-admin@hochschule-trier.de #25

The SOA RNAME ip-admin.hochschule-trier.de means ip-admin@hochschule-trier.de.
!

Serial date in the future

The serial 2026102333 looks like a date (YYYYMMDDnn) in the future (2026-10-23). It can only grow, so a wrong date can't be undone without a serial wrap-around.

#26

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: 29 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
36562	RSASHA256 (8)	SHA256 65AC77B3518CC31F…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
36562	KSK (257)	RSASHA256 (8)
45381	ZSK (256)	RSASHA256 (8)

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 36562 (SHA256).
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ Signatures valid until 2026-10-29 #30

The earliest DNSKEY/SOA signature expires at 2026-10-29 08:40 UTC.
✓ NSEC3 as recommended #31

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

Records

pass

21 records at the apex

Found

Read from: 143.93.54.7:53

Type	Value	TTL
SOA	dns.fh-trier.de. ip-admin.hochschule-trier.de. 2026102333 28800 7200 1209600 86400	3600
NS	dns.fh-trier.de.	86400
NS	ns.umwelt-campus.de.	86400
A	143.93.48.114	86400
MX	10 gateway-a.fh-trier.de.	86400
MX	10 gateway-b.fh-trier.de.	86400
TXT	"adobe-idp-site-verification=8cc468706573fef8835ec3676ae8782a924548b58562d24b1ca78a720ed7b0c6"	86400
TXT	"ZA=vH4jCtzf5ASM4Rr0oVllJ7/UDjyZGtcmSR3nnBacntk="	86400
TXT	"MS=ED0AD3F7596F416D40372B292FB7676180F25954"	86400
TXT	"v=spf1 redirect=_spf.hochschule-trier.de"	86400
TXT	"adobe-idp-site-verification=c012db4a9a2361f6dab6dfecc883fb20d44b9d192e97b2e473808df36801d8f2"	86400
TXT	"apple-domain-verification=PjEUcGuYNrw7WgSp"	86400
TXT	"google-site-verification=9ygjq05RMzuM1W_Bc_tZPiNvzdIHJcX6Or2QP_Zoup0"	86400
CAA	0 issue "telesec.de"	86400
CAA	0 issue "letsencrypt.org"	86400
CAA	0 issue "pki.dfn.de"	86400
CAA	0 issue "dfn.de"	86400
CAA	0 iodef "mailto:ip-admin@hochschule-trier.de"	86400
CAA	0 issuewild ";"	86400
CAA	0 issue "harica.gr"	86400
CAA	0 issue "sectigo.com"	86400

Checks

✓ TTLs within range #32

TTLs: A 1d, MX 1d, 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.
✓ CAA restricts issuance #35

Certificates may be issued by: telesec.de, letsencrypt.org, pki.dfn.de, dfn.de, none (issuance forbidden), harica.gr, sectigo.com.