klassik-stiftung.de

Checked 21 October 2026, 23:10 UTC · via 8.8.8.8
!Passed with warnings
20 passed 1 warning 0 failed 8 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

info

dns-1.dfn.de, dns-3.dfn.de, svdmzdns02.klassik-stiftung.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns-1.dfn.de, dns-3.dfn.de, svdmzdns02.klassik-stiftung.de
NS in the zone
dns-1.dfn.de, dns-3.dfn.de, svdmzdns02.klassik-stiftung.de
NameserverAddressesNetwork (AS)Glue
dns-1.dfn.de193.174.75.50 2001:638:d:b101::1AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE-
dns-3.dfn.de193.174.75.58 2001:638:d:b103::1AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE-
svdmzdns02.klassik-stiftung.de194.94.196.32AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE194.94.196.32

Checks

  • ✓ 3 nameservers #6
    Delegated to dns-1.dfn.de, dns-3.dfn.de, svdmzdns02.klassik-stiftung.de.
  • ✓ 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: svdmzdns02.klassik-stiftung.de.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • i
    One address family in one network
    all IPv6 addresses are in 2001:638:d::/48, while the other address family is spread over several networks.
    #10
  • 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): 5 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: svdmzdns02.klassik-stiftung.de.
    #13

Nameservers

info

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns-1.dfn.de 193.174.75.50NOERROR, 14 ms, authoritativenoyes / yesrefused0
dns-1.dfn.de 2001:638:d:b101::1NOERROR, 15 ms, authoritativenoyes / yesrefused0
dns-3.dfn.de 193.174.75.58NOERROR, 10 ms, authoritativenoyes / yesrefused0
dns-3.dfn.de 2001:638:d:b103::1NOERROR, 12 ms, authoritativenoyes / yesrefused0
svdmzdns02.klassik-stiftung.de 194.94.196.32NOERROR, 13 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 5 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: dns-1.dfn.de: "0"; dns-3.dfn.de: "0".
    #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 2011032217 · primary svdmzdns02.klassik-stiftung.de

Found

Primary (MNAME)
svdmzdns02.klassik-stiftung.de
Contact (RNAME)
hostmaster.klassik-stiftung.de
Serial
2011032217
Refresh / retry
28800 s / 7200 s
Expire
3024000 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
dns-1.dfn.de (193.174.75.50)2011032217
dns-1.dfn.de (2001:638:d:b101::1)2011032217
dns-3.dfn.de (193.174.75.58)2011032217
dns-3.dfn.de (2001:638:d:b103::1)2011032217
svdmzdns02.klassik-stiftung.de (194.94.196.32)2011032217

Checks

  • ✓ Serial 2011032217 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 35d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver svdmzdns02.klassik-stiftung.de is one of the listed nameservers.
  • ✓ Contact hostmaster@klassik-stiftung.de #25
    The SOA RNAME hostmaster.klassik-stiftung.de means hostmaster@klassik-stiftung.de.
  • ✓ Date-based serial #26
    The serial 2011032217 follows the YYYYMMDDnn convention (2011-03-22).

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
193.174.75.50:53
TypeValueTTL
SOAsvdmzdns02.klassik-stiftung.de. hostmaster.klassik-stiftung.de. 2011032217 28800 7200 3024000 36003600
NSdns-1.dfn.de.3600
NSdns-3.dfn.de.3600
NSsvdmzdns02.klassik-stiftung.de.3600
A194.94.196.1433600
MX10 klassikstiftung-de01i.mail.protection.outlook.com.3600
TXT"apple-domain-verification=uNJzsh155RCw9xuJxy5pvzmcZiKRuMncs82qkMVun-o"3600
TXT"adobe-idp-site-verification=d40b9b27-0177-492c-94b2-ce6ce5cf3f16"3600
TXT"MS=85ECB8AC776E021145F598A4B55A5146A0D34EF6"3600
TXT"sophos-domain-verification=46e02440cfe733219a5bf8c640b259c5cfc7200af7fbaa5e0b26b144c560229e"3600
TXT"v=spf1 mx include:spf.protection.outlook.com a:lbswei.gbv.de include:spf.mailsupport.dfn.de include:gbv.de include:spf-de.emailsignatures365.com include:newsmailservice.de a:mail.wendweb.de ip4:194.94.196.153 ~all"3600
TXT"apple-domain-verification=69VNwwIGztDoWPS6"3600
TXT"facebook-domain-verification=easifz32tpkbdorur0p2r6pbdyqwhn"3600
TXT"openai-domain-verification=dv-oeDf8GQKtg25QH1JwHJT8eKY"3600
TXT"canva-site-verification=mqeTe99L2g-KdRdQQREkMQ"3600
TXT"mistral-domain-verification=bda74e22059fce91ba5c5ff0b9020ac5ccb1f651"3600
TXT"google-site-verification=96_NZAHZxyccQqlP_59am6F_CtFSI19W8pYSY3WFWmc"3600
TXT"HARICA-uHITiI6MWHxLcAum38P"3600
TXT"cisco-ci-domain-verification=1d94873c6f07bb41e00ed95048a482d1d05acce61cda9721f98a9f5cbf99b682"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 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.
  • 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