digitalcourage.de

Checked 21 October 2026, 22:14 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

ns.digitalcourage.de, nsb4.schlundtech.de, nsc4.schlundtech.de, nsd4.schlundtech.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.digitalcourage.de, nsb4.schlundtech.de, nsc4.schlundtech.de, nsd4.schlundtech.de
NS in the zone
ns.digitalcourage.de, nsb4.schlundtech.de, nsc4.schlundtech.de, nsd4.schlundtech.de
NameserverAddressesNetwork (AS)Glue
ns.digitalcourage.de212.8.198.131AS8925 TEUTONET-AS - teuto.net Netzdienste GmbH, DE212.8.198.131
nsb4.schlundtech.de185.132.35.227 2607:f1c0:fe:53:185:132:35:227AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
nsc4.schlundtech.de217.160.80.227 2001:8d8:fe:53:217:160:80:227AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
nsd4.schlundtech.de217.160.81.227 2001:8d8:fe:53:217:160:81:227AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns.digitalcourage.de, nsb4.schlundtech.de, nsc4.schlundtech.de, nsd4.schlundtech.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: ns.digitalcourage.de.
  • ✓ 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.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 2 addresses; AS8560 (IONOS-AS - IONOS SE, DE): 4 addresses; AS8925 (TEUTONET-AS - teuto.net Netzdienste GmbH, DE): 1 address.
  • 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: ns.digitalcourage.de.
    #13

Nameservers

info

7 of 7 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.digitalcourage.de 212.8.198.131NOERROR, 20 ms, authoritativenoyes / yesrefused-
nsb4.schlundtech.de 185.132.35.227NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsb4.schlundtech.de 2607:f1c0:fe:53:185:132:35:227NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsc4.schlundtech.de 217.160.80.227NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsc4.schlundtech.de 2001:8d8:fe:53:217:160:80:227NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsd4.schlundtech.de 217.160.81.227NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsd4.schlundtech.de 2001:8d8:fe:53:217:160:81:227NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/

Checks

  • ✓ All respond #14
    All 7 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: nsb4.schlundtech.de: "Served by PowerDNS - https://www.powerdns.com/"; nsc4.schlundtech.de: "Served by PowerDNS - https://www.powerdns.com/"; nsd4.schlundtech.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 2026102102 · primary ns.digitalcourage.de

Found

Primary (MNAME)
ns.digitalcourage.de
Contact (RNAME)
domains.digitalcourage.de
Serial
2026102102
Refresh / retry
7200 s / 1800 s
Expire
1209600 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns.digitalcourage.de (212.8.198.131)2026102102
nsb4.schlundtech.de (185.132.35.227)2026102102
nsb4.schlundtech.de (2607:f1c0:fe:53:185:132:35:227)2026102102
nsc4.schlundtech.de (217.160.80.227)2026102102
nsc4.schlundtech.de (2001:8d8:fe:53:217:160:80:227)2026102102
nsd4.schlundtech.de (217.160.81.227)2026102102
nsd4.schlundtech.de (2001:8d8:fe:53:217:160:81:227)2026102102

Checks

  • ✓ Serial 2026102102 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 30m, expire 14d, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.digitalcourage.de is one of the listed nameservers.
  • ✓ Contact domains@digitalcourage.de #25
    The SOA RNAME domains.digitalcourage.de means domains@digitalcourage.de.
  • ✓ Date-based serial #26
    The serial 2026102102 follows the YYYYMMDDnn convention (2026-10-21).

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

9 records at the apex

Found

Read from
212.8.198.131:53
TypeValueTTL
SOAns.digitalcourage.de. domains.digitalcourage.de. 2026102102 7200 1800 1209600 600600
NSnsb4.schlundtech.de.600
NSnsd4.schlundtech.de.600
NSns.digitalcourage.de.600
NSnsc4.schlundtech.de.600
A94.130.145.107600
MX0 mail.digitalcourage.de.600
TXT"v=spf1 ip4:212.8.198.0/26 ip4:212.8.198.128/26 ip4:212.8.200.192/29 ip4:148.251.208.235 ip4:144.76.134.221 ip4:88.198.81.194 ip4:46.4.203.238 ip4:188.40.174.29 ip4:78.47.226.50 ip4:178.63.215.231 ip4:152.53.197.0 ~all"600
TXT"google-site-verification=huEuc19DqF9kl9rv68jbSA3NRHbCL3ZGjBbeN1JRetQ"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 10m, NS 10m. The NS TTL at the parent is 1d and in the zone 10m; 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