median-kliniken.de

Checked 21 October 2026, 23:21 UTC · via 8.8.8.8
!Passed with warnings
21 passed 2 warnings 0 failed 6 info

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

warn

ns01.median-kliniken.de, ns3.twl-kom.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns01.median-kliniken.de, ns3.twl-kom.de
NS in the zone
ns01.median-kliniken.de, ns3.twl-kom.de
NameserverAddressesNetwork (AS)Glue
ns01.median-kliniken.de188.94.99.87AS9022 TWL-KOM-AS - TWL-KOM GmbH, DE188.94.99.87
ns3.twl-kom.de85.115.3.98AS12843 TELEMAXX - TelemaxX Telekommunikation GmbH, DE85.115.3.98

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns01.median-kliniken.de, ns3.twl-kom.de.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns01.median-kliniken.de.
  • ✓ 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 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS12843 (TELEMAXX - TelemaxX Telekommunikation GmbH, DE): 1 address; AS9022 (TWL-KOM-AS - TWL-KOM GmbH, DE): 1 address.
  • 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

info

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns01.median-kliniken.de 188.94.99.87NOERROR, 7 ms, authoritativenoyes / yesrefusedDNS server
ns3.twl-kom.de 85.115.3.98NOERROR, 10 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 2 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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns01.median-kliniken.de: "DNS server".
    #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 2026100601 · primary ns01.median-kliniken.de

Found

Primary (MNAME)
ns01.median-kliniken.de
Contact (RNAME)
admin.ad.healthcare-enterprise.de
Serial
2026100601
Refresh / retry
10800 s / 3600 s
Expire
2592000 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns01.median-kliniken.de (188.94.99.87)2026100601
ns3.twl-kom.de (85.115.3.98)2026100601

Checks

  • ✓ Serial 2026100601 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 30d, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns01.median-kliniken.de is one of the listed nameservers.
  • ✓ Contact admin@ad.healthcare-enterprise.de #25
    The SOA RNAME admin.ad.healthcare-enterprise.de means admin@ad.healthcare-enterprise.de.
  • ✓ Date-based serial #26
    The serial 2026100601 follows the YYYYMMDDnn convention (2026-10-06).

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

19 records at the apex

Found

Read from
188.94.99.87:53
TypeValueTTL
SOAns01.median-kliniken.de. admin.ad.healthcare-enterprise.de. 2026100601 10800 3600 2592000 600600
NSns3.twl-kom.de.600
NSns01.median-kliniken.de.600
A131.189.14.171300
MX10 de-smtp-inbound-1.mimecast.com.300
MX10 de-smtp-inbound-2.mimecast.com.300
TXT"twilio-domain-verification=1516af1b97977d2d2ed135fa497447d9"600
TXT"anthropic-domain-verification-8ncdv0=0IuUmxJ9BPLeUXhSJPS9FUI12"600
TXT"r+A/8IhEl7ckslIKGBM8jazY6djCmTQeinjFZ7ZT2poXxjp4HnuX3a/wxn2Aqg8YJJvbcClCNy/cmOL2GvYu/w=="600
TXT"_globalsign-domain-verification=K80igqJwDQBIIV7I69AJuCgFAaGihffD5owOcO9Oz_"600
TXT"_globalsign-domain-verification=sVrFEOaniWRhIS7endIj7sXfeO2tljEHCM09NjZgRQ"600
TXT"/qSfG6JfPHQGf821/40FRtqxf22uwZu9dbiLPuQyv2AQtdQhqTC+kExsMsurZybXz6zUmTB6UT3hwsPOKyNNiQ=="600
TXT"atlassian-domain-verification=iTXqrrCUTCqUQkjgNBI9qjH3eeOEScF4mH9tiEaRx4Mv8zzE4KsoHzEcc1bXwEqU"600
TXT"protonmail-verification=ae721cc6d15a9c188cc61e04097cc71e33784046"600
TXT"v=spf1 mx include:eu._netblocks.mimecast.com ip4:5.61.115.80/28 ip4:62.12.135.192/26 ip4:62.12.156.65/26 ip4:213.203.220.31/32 ip4:81.173.209.69 ip4:85.215.119.13 ip4:157.90.247.133 include:spf.twl-kom.de include:_spf.rexx-suite.com " "include:spf.protection.outlook.com include:de._netblocks.mimecast.com -all"600
TXT"brevo-code:d17bb3da3cb6849dfdb2db610bdb3787"600
TXT"ms-domain-verification=3336df64-58a2-4bdd-9628-50b44eff4b52"600
TXT"bw=iWqRywpO7MDAqyN1SvLIAuKuTsqMTvgLdeaqo2Jptni4"600
TXT"MS=01AA72A0CFE6F73FF52902198FCF5253B7D237C7"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, NS 10m. The NS TTL at the parent is 1d and in the zone 10m; 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.
  • 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