cad.de

Checked 21 October 2026, 22:05 UTC · via 8.8.8.8
!Passed with warnings
20 passed 2 warnings 0 failed 7 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

ns3.edns.de, ns4.edns.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns3.edns.de, ns4.edns.de
NS in the zone
ns3.edns.de, ns4.edns.de
NameserverAddressesNetwork (AS)Glue
ns3.edns.de154.56.104.3 2001:978:90f::2AS214319 blackpoint - blackpoint GmbH, DE AS214319 blackpoint - blackpoint GmbH, DE154.56.104.3 2001:978:90f::2
ns4.edns.de149.13.77.2 2001:978:90f::1:104AS214319 blackpoint - blackpoint GmbH, DE AS214319 blackpoint - blackpoint GmbH, DE149.13.77.2 2001:978:90f::1:104

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns3.edns.de, ns4.edns.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.
  • i
    One address family in one network
    all IPv6 addresses are in 2001:978:90f::/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 (AS214319 (blackpoint - blackpoint 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
  • 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

warn

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns3.edns.de 154.56.104.3NOERROR, 8 ms, authoritativenoyes / yesrefused-
ns3.edns.de 2001:978:90f::2NOERROR, 6 ms, authoritativenoyes / yesrefused-
ns4.edns.de 149.13.77.2NOERROR, 16 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.8.5 (built Feb 7 2025 09:28:48 by root@localhost)
ns4.edns.de 2001:978:90f::1:104NOERROR, 18 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.8.5 (built Feb 7 2025 09:28:48 by root@localhost)

Checks

  • ✓ 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: ns4.edns.de: "PowerDNS Authoritative Server 4.8.5 (built Feb 7 2025 09:28:48 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.

SOA

pass

serial 2026060810 · primary ns3.edns.de

Found

Primary (MNAME)
ns3.edns.de
Contact (RNAME)
webmaster.cad.de
Serial
2026060810
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns3.edns.de (154.56.104.3)2026060810
ns3.edns.de (2001:978:90f::2)2026060810
ns4.edns.de (149.13.77.2)2026060810
ns4.edns.de (2001:978:90f::1:104)2026060810

Checks

  • ✓ Serial 2026060810 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns3.edns.de is one of the listed nameservers.
  • ✓ Contact webmaster@cad.de #25
    The SOA RNAME webmaster.cad.de means webmaster@cad.de.
  • ✓ Date-based serial #26
    The serial 2026060810 follows the YYYYMMDDnn convention (2026-06-08).

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

6 records at the apex

Found

Read from
154.56.104.3:53
TypeValueTTL
SOAns3.edns.de. webmaster.cad.de. 2026060810 10800 3600 604800 8640033296
NSns3.edns.de.44317
NSns4.edns.de.44317
A149.13.77.2463374
MX10 cad.de.33226
TXT"v=spf1 mx ip4:149.13.77.24 ip4:149.13.77.19 ip4:149.13.77.20 -all"33226

Checks

  • ✓ TTLs within range #32
    TTLs: A 17h36m14s, MX 9h13m46s, NS 12h18m37s. The NS TTL at the parent is 1d and in the zone 12h18m37s; 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