deutscheakademie.de

Checked 21 October 2026, 22:13 UTC · via 8.8.8.8
!Passed with warnings
22 passed 1 warning 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

ns25.domaincontrol.com, ns26.domaincontrol.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns25.domaincontrol.com, ns26.domaincontrol.com
NS in the zone
ns25.domaincontrol.com, ns26.domaincontrol.com
NameserverAddressesNetwork (AS)Glue
ns25.domaincontrol.com97.74.102.13 2603:5:2161::dAS44273 GODADDY-DNS - Host Europe GmbH, DE AS44273 GODADDY-DNS - Host Europe GmbH, DE-
ns26.domaincontrol.com173.201.70.13 2603:5:2261::dAS44273 GODADDY-DNS - Host Europe GmbH, DE AS44273 GODADDY-DNS - Host Europe GmbH, DE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns25.domaincontrol.com, ns26.domaincontrol.com.
    #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.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 2 IPv4 /24s and 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS44273 (GODADDY-DNS - Host Europe 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 .com
    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

pass

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns25.domaincontrol.com 97.74.102.13NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns25.domaincontrol.com 2603:5:2161::dNOERROR, 4 ms, authoritativenoyes / yesrefused-
ns26.domaincontrol.com 173.201.70.13NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns26.domaincontrol.com 2603:5:2261::dNOERROR, 4 ms, authoritativenoyes / yesrefused-

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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 2026082502 · primary ns25.domaincontrol.com

Found

Primary (MNAME)
ns25.domaincontrol.com
Contact (RNAME)
dns.jomax.net
Serial
2026082502
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns25.domaincontrol.com (97.74.102.13)2026082502
ns25.domaincontrol.com (2603:5:2161::d)2026082502
ns26.domaincontrol.com (173.201.70.13)2026082502
ns26.domaincontrol.com (2603:5:2261::d)2026082502

Checks

  • ✓ Serial 2026082502 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns25.domaincontrol.com is one of the listed nameservers.
  • ✓ Contact dns@jomax.net #25
    The SOA RNAME dns.jomax.net means dns@jomax.net.
  • ✓ Date-based serial #26
    The serial 2026082502 follows the YYYYMMDDnn convention (2026-08-25).

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
97.74.102.13:53
TypeValueTTL
SOAns25.domaincontrol.com. dns.jomax.net. 2026082502 28800 7200 604800 6003600
NSns26.domaincontrol.com.3600
NSns25.domaincontrol.com.3600
A83.169.31.1386400
AAAA2a01:488:42:1000:53a9:1f0d:ff56:157a86400
MX10 mx-01-eu-central-1.prod.hydra.sophos.com.86400
MX20 mx-02-eu-central-1.prod.hydra.sophos.com.86400
TXT"sophos-domain-verification=1d23edecfc3fba19a4efbb25909e3531fc81e52f"86400
TXT"v=spf1 include:spf.mailjet.com a mx mx:exchangehosted.deutscheakademie.de ip4:80.237.138.0/24 ip4:83.169.31.13 ip4:213.188.110.0/23 ip6:2a01:488:42::/48 ip6:2a01:488:42:1000:53a9:1f0d:ff56:157a include:_spf.prod.hydra.sophos.com ~all"86400
TXT"google-site-verification=irAfpxEjW2til1tF91QYe_u_Hy265qvgkMvlt2MQNCA"86400
TXT"u5a740l59gos63lnkj5aeffpef"86400

Checks

  • ✓ TTLs within range #32
    TTLs: A 1d, AAAA 1d, MX 1d, 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