Domain report: tha.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

deneb.dfn.de, dns1.hs-augsburg.de, dns2.hs-augsburg.de

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: deneb.dfn.de, dns1.hs-augsburg.de, dns2.hs-augsburg.de
NS in the zone: deneb.dfn.de, dns1.hs-augsburg.de, dns2.hs-augsburg.de

Nameserver	Addresses	Network (AS)	Glue
deneb.dfn.de	192.76.176.9 2001:638:800:1::9	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	-
dns1.hs-augsburg.de	141.82.217.100 2001:638:102:2::217:100	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	-
dns2.hs-augsburg.de	141.82.217.101 2001:638:102:2::217:101	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	-

Checks

✓ 3 nameservers #6

Delegated to deneb.dfn.de, dns1.hs-augsburg.de, dns2.hs-augsburg.de.
✓ 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 2 IPv6 /48s.
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS680 (DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE): 6 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
✓ 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
deneb.dfn.de 192.76.176.9	NOERROR, 14 ms, authoritative	no	yes / yes	refused	0
deneb.dfn.de 2001:638:800:1::9	NOERROR, 14 ms, authoritative	no	yes / yes	refused	0
dns1.hs-augsburg.de 141.82.217.100	NOERROR, 12 ms, authoritative	no	yes / yes	refused	9.18.49-1~deb12u1-Debian
dns1.hs-augsburg.de 2001:638:102:2::217:100	NOERROR, 13 ms, authoritative	no	yes / yes	refused	9.18.49-1~deb12u1-Debian
dns2.hs-augsburg.de 141.82.217.101	NOERROR, 12 ms, authoritative	no	yes / yes	refused	9.18.49-1~deb12u1-Debian
dns2.hs-augsburg.de 2001:638:102:2::217:101	NOERROR, 13 ms, authoritative	no	yes / yes	refused	9.18.49-1~deb12u1-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.hs-augsburg.de: "9.18.49-1~deb12u1-Debian"; dns2.hs-augsburg.de: "9.18.49-1~deb12u1-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 2026101305 · primary dns1.hs-augsburg.de

Found

Primary (MNAME): dns1.hs-augsburg.de
Contact (RNAME): root.dns1.hs-augsburg.de
Serial: 2026101305
Refresh / retry: 10800 s / 7200 s
Expire: 604800 s
Negative TTL: 86400 s

Serial per nameserver

Nameserver	Serial
deneb.dfn.de (192.76.176.9)	2026101305
deneb.dfn.de (2001:638:800:1::9)	2026101305
dns1.hs-augsburg.de (141.82.217.100)	2026101305
dns1.hs-augsburg.de (2001:638:102:2::217:100)	2026101305
dns2.hs-augsburg.de (141.82.217.101)	2026101305
dns2.hs-augsburg.de (2001:638:102:2::217:101)	2026101305

Checks

✓ Serial 2026101305 everywhere #22

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

SOA refresh 3h, retry 2h, expire 7d, negative TTL 1d.
✓ Primary is a public nameserver #24

The primary nameserver dns1.hs-augsburg.de is one of the listed nameservers.
✓ Contact root@dns1.hs-augsburg.de #25

The SOA RNAME root.dns1.hs-augsburg.de means root@dns1.hs-augsburg.de.
✓ Date-based serial #26

The serial 2026101305 follows the YYYYMMDDnn convention (2026-10-13).

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: 1 November 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
58234	RSASHA256 (8)	SHA256 6E56FA0512362222…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
11941	ZSK (256)	RSASHA256 (8)
58234	KSK (257)	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 58234 (SHA256).
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ Signatures valid until 2026-11-01 #30

The earliest DNSKEY/SOA signature expires at 2026-11-01 02:11 UTC.
✓ NSEC3 as recommended #31

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

Records

pass

20 records at the apex

Found

Read from: 192.76.176.9:53

Type	Value	TTL
SOA	dns1.hs-augsburg.de. root.dns1.hs-augsburg.de. 2026101305 10800 7200 604800 86400	3600
NS	dns1.hs-augsburg.de.	3600
NS	deneb.dfn.de.	3600
NS	dns2.hs-augsburg.de.	3600
A	141.82.11.30	3600
AAAA	2001:638:102:201::11:30	3600
MX	30 postfix2-out.RZ.HS-Augsburg.DE.	3600
MX	30 postfix1-out.RZ.HS-Augsburg.DE.	3600
TXT	"ZOOM_verify_jjkfIHv3IWbQV29bUWa66h"	3600
TXT	"MS=ms10988624"	3600
TXT	"anthropic-domain-verification-q08zvr=1AGpcTx8HYOuCXXFvUAzU4bPQ"	3600
TXT	"HARICA-q5ns4Lwdbrxuc40zfPy"	3600
TXT	"v=spf1 ip4:141.82.11.25/24 ip4:141.82.217.130/24 ip6:2001:638:102:2::217:131/80 ip6:2001:638:102:201::11:25/80 include:_spf.rexx-suite.com a:bvbvxmail.bib-bvb.de include:spf.protection.outlook.com include:customer.securityeducation.com -all"	3600
TXT	"HARICA-UqdWcXDOgO5ppqGnvsS"	3600
TXT	"apple-domain-verification=2hLJp036YAdR5PqM"	3600
TXT	"google-site-verification=fEQH5Sh9UsFHCIoxemvo9YrpCfeOkS0rNTS0JsrQMbY"	3600
CAA	0 issue "letsencrypt.org"	3600
CAA	0 issue "sectigo.com"	3600
CAA	0 issue "harica.gr"	3600
CAA	0 issue "pki.dfn.de"	3600

Checks

✓ TTLs within range #32

TTLs: A 1h, AAAA 1h, MX 1h, NS 1h. The NS TTL at the parent is 1d and in the zone 1h; resolvers may use either.
✓ 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: letsencrypt.org, sectigo.com, harica.gr, pki.dfn.de.