costakreuzfahrten.de

Checked 21 October 2026, 22:11 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 warnings 0 failed 5 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.markmonitor.com, ns3.markmonitor.com, ns4.markmonitor.com, ns5.markmonitor.com, ns6.markmonitor.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.markmonitor.com, ns3.markmonitor.com, ns4.markmonitor.com, ns5.markmonitor.com, ns6.markmonitor.com
NS in the zone
ns1.markmonitor.com, ns3.markmonitor.com, ns4.markmonitor.com
NameserverAddressesNetwork (AS)Glue
ns1.markmonitor.com149.112.160.1 2620:10a:80a8::1AS55195 CIRA-CLOUD1 - CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet, CA AS55195 CIRA-CLOUD1 - CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet, CA-
ns3.markmonitor.com149.112.161.1 2620:10a:80a9::1AS394354 CIRA-CLOUD2 - CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet, CA AS394354 CIRA-CLOUD2 - CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet, CA-
ns4.markmonitor.com192.174.68.1 2001:67c:1bc::1AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT-
ns5.markmonitor.com (parent only)149.112.160.2 2620:10a:80a8::2AS55195 CIRA-CLOUD1 - CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet, CA AS55195 CIRA-CLOUD1 - CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet, CA-
ns6.markmonitor.com (parent only)176.97.158.3 2001:67c:10b8::3AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT-

Checks

  • ✓ 5 nameservers #6
    Delegated to ns1.markmonitor.com, ns3.markmonitor.com, ns4.markmonitor.com, ns5.markmonitor.com, ns6.markmonitor.com.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns5.markmonitor.com, ns6.markmonitor.com. ns1.markmonitor.com, ns3.markmonitor.com, ns4.markmonitor.com, ns5.markmonitor.com, ns6.markmonitor.com report NS ns1.markmonitor.com ns3.markmonitor.com ns4.markmonitor.com.
    #7
  • ✓ 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 4 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS1921 (RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT): 4 addresses; AS394354 (CIRA-CLOUD2 - CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet, CA): 2 addresses; AS55195 (CIRA-CLOUD1 - CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet, CA): 4 addresses.
  • 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

info

10 of 10 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.markmonitor.com 149.112.160.1NOERROR, 14 ms, authoritativenoyes / yesrefusedCIRA Server
ns1.markmonitor.com 2620:10a:80a8::1NOERROR, 14 ms, authoritativenoyes / yesrefusedCIRA Server
ns3.markmonitor.com 149.112.161.1NOERROR, 4 ms, authoritativenoyes / yesrefusedCIRA Server
ns3.markmonitor.com 2620:10a:80a9::1NOERROR, 4 ms, authoritativenoyes / yesrefusedCIRA Server
ns4.markmonitor.com 192.174.68.1NOERROR, 5 ms, authoritativenoyes / yesrefusedRcodeZero DNS
ns4.markmonitor.com 2001:67c:1bc::1NOERROR, 4 ms, authoritativenoyes / yesrefusedRcodeZero DNS
ns5.markmonitor.com 149.112.160.2NOERROR, 13 ms, authoritativenoyes / yesrefusedCIRA Server
ns5.markmonitor.com 2620:10a:80a8::2NOERROR, 15 ms, authoritativenoyes / yesrefusedCDG D-ZONE nameserver
ns6.markmonitor.com 176.97.158.3NOERROR, 12 ms, authoritativenoyes / yesrefusedRcodeZero DNS
ns6.markmonitor.com 2001:67c:10b8::3NOERROR, 12 ms, authoritativenoyes / yesrefusedRcodeZero DNS

Checks

  • ✓ All respond #14
    All 10 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: ns1.markmonitor.com: "CIRA Server"; ns3.markmonitor.com: "CIRA Server"; ns4.markmonitor.com: "RcodeZero DNS"; ns5.markmonitor.com: "CIRA Server"; ns5.markmonitor.com: "CDG D-ZONE nameserver"; ns6.markmonitor.com: "RcodeZero DNS".
    #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 2026102101 · primary ns1.markmonitor.com

Found

Primary (MNAME)
ns1.markmonitor.com
Contact (RNAME)
hostmaster.markmonitor.com
Serial
2026102101
Refresh / retry
86400 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.markmonitor.com (149.112.160.1)2026102101
ns1.markmonitor.com (2620:10a:80a8::1)2026102101
ns3.markmonitor.com (149.112.161.1)2026102101
ns3.markmonitor.com (2620:10a:80a9::1)2026102101
ns4.markmonitor.com (192.174.68.1)2026102101
ns4.markmonitor.com (2001:67c:1bc::1)2026102101
ns5.markmonitor.com (149.112.160.2)2026102101
ns5.markmonitor.com (2620:10a:80a8::2)2026102101
ns6.markmonitor.com (176.97.158.3)2026102101
ns6.markmonitor.com (2001:67c:10b8::3)2026102101

Checks

  • ✓ Serial 2026102101 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 2h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.markmonitor.com is one of the listed nameservers.
  • ✓ Contact hostmaster@markmonitor.com #25
    The SOA RNAME hostmaster.markmonitor.com means hostmaster@markmonitor.com.
  • ✓ Date-based serial #26
    The serial 2026102101 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

15 records at the apex

Found

Read from
149.112.160.1:53
TypeValueTTL
SOAns1.markmonitor.com. hostmaster.markmonitor.com. 2026102101 86400 7200 604800 8640086400
NSns1.markmonitor.com.86400
NSns3.markmonitor.com.86400
NSns4.markmonitor.com.86400
A194.40.209.2086400
MX200 213.215.231.12.86400
MX50 costawm.costa.it.86400
TXT"3jzdgpmfytlp8cy441sn7k0zcvghq6t2"86400
TXT"_y4bapihsije3d6qahqcefa68p43py4i"86400
TXT"g9ky2g6lbrtt0rynznfzfqqj0x9l4s2b"86400
TXT"zfwqwl5twyyl7xh103ncqh1sn0t5bp7w"86400
TXT"facebook-domain-verification=8qufwjcw3he5jssn1asg9z5voud1ke"86400
TXT"v=spf1 mx a:mx.aida.de a:mx-out.aida.de a:mx-out2.aida.de ~all"86400
TXT"google-site-verification=j5JZzp3L9SoJiBjpoOzMcl8Y0uhb-weOwvpuQC0_xTU"86400
TXT"trustpilot-one-time-verification-id=ab1d989d-8236-4044-b568-967f4cfd10d3"86400

Checks

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