akkreditierungsrat.de

Checked 21 October 2026, 21:28 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

info

ns01.taenzer.hosting, ns02.taenzer.hosting, ns03.taenzer.hosting, ns04.taenzer.hosting

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns01.taenzer.hosting, ns02.taenzer.hosting, ns03.taenzer.hosting, ns04.taenzer.hosting
NS in the zone
ns01.taenzer.hosting, ns02.taenzer.hosting, ns03.taenzer.hosting, ns04.taenzer.hosting
NameserverAddressesNetwork (AS)Glue
ns01.taenzer.hosting217.160.80.161 2001:8d8:fe:53:217:160:80:161AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
ns02.taenzer.hosting217.160.81.161 2001:8d8:fe:53:217:160:81:161AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
ns03.taenzer.hosting185.132.35.161 2607:f1c0:fe:53:185:132:35:161AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
ns04.taenzer.hosting185.132.34.161 2607:f1c0:fe:53:185:132:34:161AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns01.taenzer.hosting, ns02.taenzer.hosting, ns03.taenzer.hosting, ns04.taenzer.hosting.
  • ✓ 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 4 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 4 addresses; AS8560 (IONOS-AS - IONOS SE, DE): 4 addresses.
  • i
    All nameserver names under .hosting
    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

info

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns01.taenzer.hosting 217.160.80.161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns01.taenzer.hosting 2001:8d8:fe:53:217:160:80:161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns02.taenzer.hosting 217.160.81.161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns02.taenzer.hosting 2001:8d8:fe:53:217:160:81:161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns03.taenzer.hosting 185.132.35.161NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns03.taenzer.hosting 2607:f1c0:fe:53:185:132:35:161NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns04.taenzer.hosting 185.132.34.161NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns04.taenzer.hosting 2607:f1c0:fe:53:185:132:34:161NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/

Checks

  • ✓ All respond #14
    All 8 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.taenzer.hosting: "Served by PowerDNS - https://www.powerdns.com/"; ns02.taenzer.hosting: "Served by PowerDNS - https://www.powerdns.com/"; ns03.taenzer.hosting: "Served by PowerDNS - https://www.powerdns.com/"; ns04.taenzer.hosting: "Served by PowerDNS - https://www.powerdns.com/".
    #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 2025112411 · primary ns01.taenzer.hosting

Found

Primary (MNAME)
ns01.taenzer.hosting
Contact (RNAME)
st.taenzer.me
Serial
2025112411
Refresh / retry
43200 s / 7200 s
Expire
1209600 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns01.taenzer.hosting (217.160.80.161)2025112411
ns01.taenzer.hosting (2001:8d8:fe:53:217:160:80:161)2025112411
ns02.taenzer.hosting (217.160.81.161)2025112411
ns02.taenzer.hosting (2001:8d8:fe:53:217:160:81:161)2025112411
ns03.taenzer.hosting (185.132.35.161)2025112411
ns03.taenzer.hosting (2607:f1c0:fe:53:185:132:35:161)2025112411
ns04.taenzer.hosting (185.132.34.161)2025112411
ns04.taenzer.hosting (2607:f1c0:fe:53:185:132:34:161)2025112411

Checks

  • ✓ Serial 2025112411 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 2h, expire 14d, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns01.taenzer.hosting is one of the listed nameservers.
  • ✓ Contact st@taenzer.me #25
    The SOA RNAME st.taenzer.me means st@taenzer.me.
  • ✓ Date-based serial #26
    The serial 2025112411 follows the YYYYMMDDnn convention (2025-11-24).

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

warn

13 records at the apex

Found

Read from
217.160.80.161:53
TypeValueTTL
SOAns01.taenzer.hosting. st.taenzer.me. 2025112411 43200 7200 1209600 600600
NSns01.taenzer.hosting.600
NSns02.taenzer.hosting.600
NSns04.taenzer.hosting.600
NSns03.taenzer.hosting.600
A178.104.181.10160
MX20 mx02.hornetsecurity.com.3600
MX10 mx01.hornetsecurity.com.3600
MX30 mx03.hornetsecurity.com.3600
MX40 mx04.hornetsecurity.com.3600
TXT"MS=ms69209279"60
TXT"v=spf1 redirect=akkreditierungsrat.de.spf.hornetdmarc.com"60
TXT"brevo-code:bc2dd93a6137e2d4ea79dc01081d24c6"60

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 10m; resolvers may use either.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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