dincertco.de

Checked 21 October 2026, 22:14 UTC · via 8.8.8.8
!Passed with warnings
20 passed 4 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

emea-ns1.tuv.com, emea-ns2.tuv.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
emea-ns1.tuv.com, emea-ns2.tuv.com
NS in the zone
emea-ns1.tuv.com, emea-ns2.tuv.com
NameserverAddressesNetwork (AS)Glue
emea-ns1.tuv.com195.20.221.162AS42249 TUEV_RHEINLAND_AS - TUEV Rheinland Service GmbH, DE-
emea-ns2.tuv.com195.20.221.163AS42249 TUEV_RHEINLAND_AS - TUEV Rheinland Service GmbH, DE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: emea-ns1.tuv.com, emea-ns2.tuv.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 one network
    all IPv4 addresses are in 195.20.221.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS42249 (TUEV_RHEINLAND_AS - TUEV Rheinland Service GmbH, DE): 2 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

pass

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
emea-ns1.tuv.com 195.20.221.162NOERROR, 11 ms, authoritativenoyes / yesrefused-
emea-ns2.tuv.com 195.20.221.163NOERROR, 8 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 2 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 2026072701 · primary emea-ns1.tuv.com

Found

Primary (MNAME)
emea-ns1.tuv.com
Contact (RNAME)
dns-admin.tuv.com
Serial
2026072701
Refresh / retry
10800 s / 3600 s
Expire
1209600 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
emea-ns1.tuv.com (195.20.221.162)2026072701
emea-ns2.tuv.com (195.20.221.163)2026072701

Checks

  • ✓ Serial 2026072701 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 14d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver emea-ns1.tuv.com is one of the listed nameservers.
  • ✓ Contact dns-admin@tuv.com #25
    The SOA RNAME dns-admin.tuv.com means dns-admin@tuv.com.
  • ✓ Date-based serial #26
    The serial 2026072701 follows the YYYYMMDDnn convention (2026-07-27).

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

warn

15 records at the apex

Found

Read from
195.20.221.162:53
TypeValueTTL
SOAemea-ns1.tuv.com. dns-admin.tuv.com. 2026072701 10800 3600 1209600 30021600
NSemea-ns2.tuv.com.86400
NSemea-ns1.tuv.com.86400
A52.166.21.24560
MX10 mxa-0058f602.gslb.pphosted.com.1800
MX20 mxb-0058f602.gslb.pphosted.com.1800
TXT"google-site-verification=t_FoLqzxy2kIxY-U2nvjcNSACkeqIRg-igmpB_NRgAA"300
TXT"MS=ms94072531"300
TXT"v=spf1 ip4:195.20.220.192/32 ip4:195.20.220.193/32 ip4:152.186.32.214/32 ip4:103.19.38.105/32 ip4:195.20.220.234/32 include:spf-0058f602.pphosted.com ?all"300
TXT"docusign=ec263716-2a66-4579-9659-64e3b1432bfa"300
TXT"cisco-ci-domain-verification=56fc0e5260cdedf410d3ba3e54bb900729f380d7884f338c73c094f9347d0743"300
CAA0 iodef "mailto:netop@tuv.com"300
CAA0 issuewild "d-trust.de"300
CAA0 issue "d-trust.de"300
CAA0 contactemail "domain-validation@de.tuv.com"300

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m). Low TTLs are useful just before a planned change.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: d-trust.de.