hellabrunn.de

Checked 21 October 2026, 22:50 UTC · via 8.8.8.8
!Passed with warnings
23 passed 3 warnings 0 failed 3 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

warn

ns1.cowic.com, ns1.cowic.de, ns2.cowic.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.cowic.com, ns1.cowic.de, ns2.cowic.de
NS in the zone
ns1.cowic.com, ns1.cowic.de, ns2.cowic.de
NameserverAddressesNetwork (AS)Glue
ns1.cowic.com116.202.94.171AS24940 HETZNER-AS - Hetzner Online GmbH, DE-
ns1.cowic.de116.202.94.171AS24940 HETZNER-AS - Hetzner Online GmbH, DE116.202.94.171
ns2.cowic.de82.165.20.230AS8560 IONOS-AS - IONOS SE, DE82.165.20.230

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.cowic.com, ns1.cowic.de, ns2.cowic.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 2 IPv4 /24s and 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 2 addresses; AS8560 (IONOS-AS - IONOS SE, DE): 1 address.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .de.
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

warn

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.cowic.com 116.202.94.171NOERROR, 2 ms, authoritativenoyes / yesrefused9.20.29-1~deb13u1-Debian
ns1.cowic.de 116.202.94.171NOERROR, 2 ms, authoritativenoyes / yesrefused9.20.29-1~deb13u1-Debian
ns2.cowic.de 82.165.20.230NOERROR, 12 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian

Checks

  • ✓ All respond #14
    All 3 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: ns1.cowic.com: "9.20.29-1~deb13u1-Debian"; ns1.cowic.de: "9.20.29-1~deb13u1-Debian"; ns2.cowic.de: "9.18.49-1~deb12u2-Debian". 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 2026090700 · primary ns1.cowic.de

Found

Primary (MNAME)
ns1.cowic.de
Contact (RNAME)
dnsadmin.cowic.de
Serial
2026090700
Refresh / retry
10800 s / 1800 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns1.cowic.com (116.202.94.171)2026090700
ns1.cowic.de (116.202.94.171)2026090700
ns2.cowic.de (82.165.20.230)2026090700

Checks

  • ✓ Serial 2026090700 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 30m, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.cowic.de is one of the listed nameservers.
  • ✓ Contact dnsadmin@cowic.de #25
    The SOA RNAME dnsadmin.cowic.de means dnsadmin@cowic.de.
  • ✓ Date-based serial #26
    The serial 2026090700 follows the YYYYMMDDnn convention (2026-09-07).

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
116.202.94.171:53
TypeValueTTL
SOAns1.cowic.de. dnsadmin.cowic.de. 2026090700 10800 1800 604800 36003600
NSns2.cowic.de.3600
NSns1.cowic.de.3600
NSns1.cowic.com.3600
A88.198.52.2093600
MX10 mx.tierpark-hellabrunn.de.3600
TXT"v=spf1 a mx ip4:62.54.110.146 ip4:62.54.110.147 " "ip4:62.54.110.148 ip4:116.202.94.168 ip4:5.7.202.82 " "ip4:5.7.202.83 ip4:5.7.202.84 ip4:5.7.204.106 " "ip4:5.7.204.107 ip4:5.7.204.108 ip4:88.198.52.209 " "ip4:116.202.94.184 ip4:116.202.94.134 ip4:116.202.94.135 " "ip4:5.7.212.186 ip4:5.7.212.187 ip4:5.7.212.188 ip4:49.12.220.167 ip4:116.202.94.168 include:spf.crsend.com ~all"10
TXT"google-site-verification=bH6EHAGhNXU9oARutGudlaAMNnbaDr0GbbM4AfoL-aw"10
TXT"google-site-verification=RqEaZZxqe9Lr1XvIUYXj_40bt-jhKapczjuhFEiwg9E"10

Checks

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