zdh.de

Checked 22 October 2026, 01:10 UTC · via 8.8.8.8
!Passed with warnings
23 passed 1 warning 0 failed 5 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

ns1.odav.de, ns2.odav.de, ns3.odav.de, ns4.odav.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.odav.de, ns2.odav.de, ns3.odav.de, ns4.odav.de
NS in the zone
ns1.odav.de, ns2.odav.de, ns3.odav.de, ns4.odav.de
NameserverAddressesNetwork (AS)Glue
ns1.odav.de217.160.80.161 2001:8d8:fe:53:217:160:80:161AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE217.160.80.161 2001:8d8:fe:53:217:160:80:161
ns2.odav.de217.160.81.161 2001:8d8:fe:53:217:160:81:161AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE217.160.81.161 2001:8d8:fe:53:217:160:81:161
ns3.odav.de185.132.35.161 2607:f1c0:fe:53:185:132:35:161AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB185.132.35.161 2607:f1c0:fe:53:185:132:35:161
ns4.odav.de185.132.34.161 2607:f1c0:fe:53:185:132:34:161AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB185.132.34.161 2607:f1c0:fe:53:185:132:34:161

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1.odav.de, ns2.odav.de, ns3.odav.de, ns4.odav.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 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 .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

info

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.odav.de 217.160.80.161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1.odav.de 2001:8d8:fe:53:217:160:80:161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns2.odav.de 217.160.81.161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns2.odav.de 2001:8d8:fe:53:217:160:81:161NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns3.odav.de 185.132.35.161NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns3.odav.de 2607:f1c0:fe:53:185:132:35:161NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns4.odav.de 185.132.34.161NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns4.odav.de 2607:f1c0:fe:53:185:132:34:161NOERROR, 6 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: ns1.odav.de: "Served by PowerDNS - https://www.powerdns.com/"; ns2.odav.de: "Served by PowerDNS - https://www.powerdns.com/"; ns3.odav.de: "Served by PowerDNS - https://www.powerdns.com/"; ns4.odav.de: "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 2025111912 · primary ns1.odav.de

Found

Primary (MNAME)
ns1.odav.de
Contact (RNAME)
webservices.odav.de
Serial
2025111912
Refresh / retry
43200 s / 7200 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.odav.de (217.160.80.161)2025111912
ns1.odav.de (2001:8d8:fe:53:217:160:80:161)2025111912
ns2.odav.de (217.160.81.161)2025111912
ns2.odav.de (2001:8d8:fe:53:217:160:81:161)2025111912
ns3.odav.de (185.132.35.161)2025111912
ns3.odav.de (2607:f1c0:fe:53:185:132:35:161)2025111912
ns4.odav.de (185.132.34.161)2025111912
ns4.odav.de (2607:f1c0:fe:53:185:132:34:161)2025111912

Checks

  • ✓ Serial 2025111912 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 2h, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.odav.de is one of the listed nameservers.
  • ✓ Contact webservices@odav.de #25
    The SOA RNAME webservices.odav.de means webservices@odav.de.
  • ✓ Date-based serial #26
    The serial 2025111912 follows the YYYYMMDDnn convention (2025-11-19).

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

11 records at the apex

Found

Read from
217.160.80.161:53
TypeValueTTL
SOAns1.odav.de. webservices.odav.de. 2025111912 43200 7200 1209600 8640086400
NSns3.odav.de.86400
NSns4.odav.de.86400
NSns1.odav.de.86400
NSns2.odav.de.86400
A83.246.62.993600
MX5 zdh-de.mail.protection.outlook.com.3600
TXT"MS=ms67525045"300
TXT"v=spf1 a mx ip4:80.150.176.66 include:spf.protection.outlook.com include:spf.smtp.net include:rm01.zdh.de ~all"300
TXT"openai-domain-verification=dv-lmb65h3v6Hrrtvh8OxwgtxHS"300
TXT"MS=D42030866404EA938A4989F732154012F5323E2D"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 1d.
  • ✓ 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