onlinemarketing.de

Checked 21 October 2026, 23:41 UTC · via 8.8.8.8
✗Problems found
18 passed 3 warnings 3 failed 4 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.dntrust.com, ns2.dntrust.com, ns3.dntrust.com, ns4.dntrust.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.dntrust.com, ns2.dntrust.com, ns3.dntrust.com, ns4.dntrust.com
NS in the zone
ns1.dntrust.com, ns2.dntrust.com, ns3.dntrust.com, ns4.dntrust.com
NameserverAddressesNetwork (AS)Glue
ns1.dntrust.com95.130.16.246AS13246 INETWIRE-AS - Key-Systems GmbH, DE-
ns2.dntrust.com95.130.17.218AS13246 INETWIRE-AS - Key-Systems GmbH, DE-
ns3.dntrust.com217.146.22.194AS42473 AS-ANEXIA - Anexia Cloud Solutions GmbH, AT-
ns4.dntrust.com144.76.91.137AS24940 HETZNER-AS - Hetzner Online GmbH, DE-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1.dntrust.com, ns2.dntrust.com, ns3.dntrust.com, ns4.dntrust.com.
  • ✓ 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 0 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS13246 (INETWIRE-AS - Key-Systems GmbH, DE): 2 addresses; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 1 address; AS42473 (AS-ANEXIA - Anexia Cloud Solutions GmbH, AT): 1 address.
  • 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

fail

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.dntrust.com 95.130.16.246NOERROR, 10 ms, authoritativeOPENyes / norefused-
ns2.dntrust.com 95.130.17.218NOERROR, 17 ms, authoritativenoyes / yesrefused-
ns3.dntrust.com 217.146.22.194NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns4.dntrust.com 144.76.91.137NOERROR, 3 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 4 nameserver addresses answered.
  • ✗
    Lame delegation
    These nameservers don't answer authoritatively for the zone, so resolvers ignore them: ns1.dntrust.com (95.130.16.246): NOERROR, authoritative=true.
    #15
  • ✗
    Open recursion
    These nameservers resolve names for anyone, which makes them usable for DNS amplification attacks and cache poisoning: ns1.dntrust.com (95.130.16.246). Disable recursion on authoritative servers.
    #16
  • ✓ 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.
  • !
    No EDNS
    These nameservers don't support EDNS(0), needed for DNSSEC and answers larger than 512 bytes: ns1.dntrust.com (95.130.16.246).
    #20
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2026080701 · primary ns1.dntrust.com

Found

Primary (MNAME)
ns1.dntrust.com
Contact (RNAME)
info.adfire.de
Serial
2026080701
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns2.dntrust.com (95.130.17.218)2026080701
ns3.dntrust.com (217.146.22.194)2026080701
ns4.dntrust.com (144.76.91.137)2026080701

Checks

  • ✓ Serial 2026080701 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 ns1.dntrust.com is one of the listed nameservers.
  • ✓ Contact info@adfire.de #25
    The SOA RNAME info.adfire.de means info@adfire.de.
  • ✓ Date-based serial #26
    The serial 2026080701 follows the YYYYMMDDnn convention (2026-08-07).

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

fail

0 records at the apex

Found

Read from
95.130.16.246:53

Checks

  • ✗
    CNAME at the apex
    The zone apex is a CNAME to ohlnglnglfcbieNn1.onlinemarketing.de. A CNAME can't coexist with the SOA and NS records (RFC 1034); use your provider's ALIAS/flattening feature instead.
    #33
  • ✓ 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