dethleffs.de

Checked 21 October 2026, 22:13 UTC · via 8.8.8.8
!Passed with warnings
26 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

ns1.eurodns.com, ns2.eurodns.com, ns3.eurodns.com, ns4.eurodns.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.eurodns.com, ns2.eurodns.com, ns3.eurodns.com, ns4.eurodns.com
NS in the zone
ns1.eurodns.com, ns2.eurodns.com, ns3.eurodns.com, ns4.eurodns.com
NameserverAddressesNetwork (AS)Glue
ns1.eurodns.com199.167.66.107 2610:1c8:b002::107AS23393 NUCDN - NuCDN LLC, US AS23393 NUCDN - NuCDN LLC, US-
ns2.eurodns.com104.37.178.107 2610:1c8:b001::107AS23393 NUCDN - NuCDN LLC, US AS23393 NUCDN - NuCDN LLC, US-
ns3.eurodns.com199.167.66.108 2610:1c8:b002::108AS23393 NUCDN - NuCDN LLC, US AS23393 NUCDN - NuCDN LLC, US-
ns4.eurodns.com104.37.178.108 2610:1c8:b001::108AS23393 NUCDN - NuCDN LLC, US AS23393 NUCDN - NuCDN LLC, US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1.eurodns.com, ns2.eurodns.com, ns3.eurodns.com, ns4.eurodns.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 2 IPv4 /24s and 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS23393 (NUCDN - NuCDN LLC, US): 8 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.eurodns.com 199.167.66.107NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns1.eurodns.com 2610:1c8:b002::107NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns2.eurodns.com 104.37.178.107NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns2.eurodns.com 2610:1c8:b001::107NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns3.eurodns.com 199.167.66.108NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns3.eurodns.com 2610:1c8:b002::108NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns4.eurodns.com 104.37.178.108NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns4.eurodns.com 2610:1c8:b001::108NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 8 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 2026082510 · primary ns1.eurodns.com

Found

Primary (MNAME)
ns1.eurodns.com
Contact (RNAME)
hostmaster.eurodns.com
Serial
2026082510
Refresh / retry
43200 s / 7200 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.eurodns.com (199.167.66.107)2026082510
ns1.eurodns.com (2610:1c8:b002::107)2026082510
ns2.eurodns.com (104.37.178.107)2026082510
ns2.eurodns.com (2610:1c8:b001::107)2026082510
ns3.eurodns.com (199.167.66.108)2026082510
ns3.eurodns.com (2610:1c8:b002::108)2026082510
ns4.eurodns.com (104.37.178.108)2026082510
ns4.eurodns.com (2610:1c8:b001::108)2026082510

Checks

  • ✓ Serial 2026082510 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 2h, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.eurodns.com is one of the listed nameservers.
  • ✓ Contact hostmaster@eurodns.com #25
    The SOA RNAME hostmaster.eurodns.com means hostmaster@eurodns.com.
  • ✓ Date-based serial #26
    The serial 2026082510 follows the YYYYMMDDnn convention (2026-08-25).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
7 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
62028ECDSAP256SHA256 (13)SHA256 7E866EABD1DCAC0F…yes

DNSKEY in the zone

Key tagRoleAlgorithm
41190ZSK (256)ECDSAP256SHA256 (13)
62028KSK (257)ECDSAP256SHA256 (13)

Checks

  • ✓ Signed and validated #27
    The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
  • ✓ DS matches a key #28
    The DS record at the parent matches a key in the zone: key tag 62028 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Signatures valid until 2026-11-07 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-07 04:36 UTC.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

warn

24 records at the apex

Found

Read from
199.167.66.107:53
TypeValueTTL
SOAns1.eurodns.com. hostmaster.eurodns.com. 2026082510 43200 7200 1209600 8640086400
NSns1.eurodns.com.86400
NSns2.eurodns.com.86400
NSns3.eurodns.com.86400
NSns4.eurodns.com.86400
A20.71.10.218188
MX0 dethleffs-de.mail.protection.outlook.com.3600
TXT"wVKHlZPao7v70wjFHEaBZxW/MuNHwQYFJ0g4Db9AzN7QZefd289FuK4Px24NbHfILGyFy/QW3RDpVTfJNYFsWg=="3600
TXT"k8qmflvb9jpim0hfps231qs2oo"3600
TXT"facebook-domain-verification=kyj0w6uvig0fvjg0lp97tn71ke8bar"3600
TXT"webexdomainverification.47eb4f8623646b17e053ab06fc0a1ba0=ff2377ee-60ec-4997-acaf-510ea194e43d"3600
TXT"MS=ms51194629"3600
TXT"google-site-verification=9i7SEDE-0oiuZwZTCAu19CWEGAz96M1n7GfvPhij7AA"3600
TXT"google-site-verification=5QgtPCAzkGl-uafA3GGcGJJH_pfJi0bZXONUlV70Wts"3600
TXT"teamviewer-sso-verification=5601b3aa92fa469b9d566ccc7e4fb05c"3600
TXT"adobe-idp-site-verification=6cc043fa32a00f20d7688fda39ae4ce378257b2c4815212cbc0923aa89be81a2"3600
TXT"sophos-domain-verification=a3e869d2acf6a6927d57a0afb1e2a53c35bd0c87021ba09010bdd88ae8230d81"3600
TXT"wdu6h7nw5a5pym7EWzyuSIGkSMIrTEbCfUPndjQmnSLg2mqB67r5cuC7ohY2s5raBLGGLuu203KXKkI9OeO/QQ=="3600
TXT"mindmanager-verification=6d5171c3ef38d075c464c880ba267cb1b2a269ed1517410f0bde1a54ac1a0713"3600
TXT"v=spf1 ip4:217.237.186.104/29 ip4:80.150.147.40/29 ip4:80.156.209.240/28 ip4:193.158.20.64/26 ip4:193.26.15.211 include:agenturserver.de ip4:87.79.4.16 ip4:93.90.194.123 ip4:93.240.236.160/27 include:spf.protection.outlook.com include:spf-de.emailsignatu" "res365.com include:_spf.salesforce.com -all"3600
TXT"atlassian-domain-verification=BjheHJgLBOfMmUzmDmm3zn6WBtfUEfm2IuA5PYVzKvSoagj9pXHwiPEV3oUxNHhp"3600
TXT"google-site-verification=rnczLwkfFks0WLD4PFU_oV4r53n6hrjudd5zQPgx3LQ"3600
TXT"miro-verification=4513cf0252a56a17d5dfe011bbdddc342eac70c9"3600
TXT"anthropic-domain-verification-09qn9q=x9vms1iaQayBq8MoAhzVmTGhz"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (3m8s). 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.
  • 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