Domain report: herzmedizin.de

Registration

info

.de country-code

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.
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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

info

ns1.hk-net.de, ns2.hk-net.de

Nameserver	Addresses	Network (AS)	Glue
ns1.hk-net.de	95.129.210.42 2a02:17f8:2000:300::2	AS44700 HAENDLEKORTE-AS - Haendle & Korte GmbH, DE AS44700 HAENDLEKORTE-AS - Haendle & Korte GmbH, DE	95.129.210.42 2a02:17f8:2000:300::2
ns2.hk-net.de	88.151.70.154 2a02:17f8:1000:300::2	AS44700 HAENDLEKORTE-AS - Haendle & Korte GmbH, DE AS44700 HAENDLEKORTE-AS - Haendle & Korte GmbH, DE	88.151.70.154 2a02:17f8:1000:300::2

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2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.hk-net.de, ns2.hk-net.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 2 IPv6 /48s.
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS44700 (HAENDLEKORTE-AS - Haendle & Korte GmbH, DE): 4 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

#11
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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.

warn

4 of 4 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.hk-net.de 95.129.210.42	NOERROR, 8 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 5.1.4 (built Aug 5 2026 13:21:02 by root@localhost)
ns1.hk-net.de 2a02:17f8:2000:300::2	NOERROR, 8 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 5.1.4 (built Aug 5 2026 13:21:02 by root@localhost)
ns2.hk-net.de 88.151.70.154	NOERROR, 8 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 5.1.4 (built Aug 5 2026 13:21:02 by root@localhost)
ns2.hk-net.de 2a02:17f8:1000:300::2	NOERROR, 8 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 5.1.4 (built Aug 5 2026 13:21:02 by root@localhost)

✓ All respond #14

All 4 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: ns1.hk-net.de: "PowerDNS Authoritative Server 5.1.4 (built Aug 5 2026 13:21:02 by root@localhost)"; ns2.hk-net.de: "PowerDNS Authoritative Server 5.1.4 (built Aug 5 2026 13:21:02 by root@localhost)". 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.

pass

serial 2026082704 · primary ns1.hk-net.de

✓ Serial 2026082704 everywhere #22

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

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

The primary nameserver ns1.hk-net.de is one of the listed nameservers.
✓ Contact monitoring@dgk.org #25

The SOA RNAME monitoring.dgk.org means monitoring@dgk.org.
✓ Date-based serial #26

The serial 2026082704 follows the YYYYMMDDnn convention (2026-08-27).

warn

Not signed

info

11 records at the apex

Type	Value	TTL
SOA	ns1.hk-net.de. monitoring.dgk.org. 2026082704 10800 3600 604800 10800	86400
NS	ns2.hk-net.de.	86400
NS	ns1.hk-net.de.	86400
A	88.151.70.209	86400
AAAA	2a02:17f8:9000:1500::209	86400
MX	10 mx1.hk-net.de.	86400
MX	10 mx3.hk-net.de.	86400
MX	10 mx2.hk-net.de.	86400
TXT	"google-site-verification=siIjJQdOOKQo9E956ZyDrNqvZ4DcM09XIiX5Ic0YRtE"	86400
TXT	"v=spf1 a mx ip4:95.129.215.131 ip4:88.151.70.36 ip4:88.151.70.34 ip4:95.129.209.253 include:spf.crsend.com ~all"	86400
TXT	"globalsign-domain-verification=9k56sMCCL-Bn6WvASbeIaUxDRyz5Iv4ALLv7TWEXz4"	86400