caseking.de

Checked 21 October 2026, 22:06 UTC · via 8.8.8.8
!Passed with warnings
24 passed 1 warning 0 failed 7 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

sri.ns.cloudflare.com, tina.ns.cloudflare.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
sri.ns.cloudflare.com, tina.ns.cloudflare.com
NS in the zone
sri.ns.cloudflare.com, tina.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
sri.ns.cloudflare.com172.64.33.234 108.162.193.234 173.245.59.234 2606:4700:58::adf5:3bea 2a06:98c1:50::ac40:21ea 2803:f800:50::6ca2:c1eaAS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-
tina.ns.cloudflare.com172.64.32.230 108.162.192.230 173.245.58.230 2606:4700:50::adf5:3ae6 2a06:98c1:50::ac40:20e6 2803:f800:50::6ca2:c0e6AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: sri.ns.cloudflare.com, tina.ns.cloudflare.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 different networks #10
    The nameservers are spread over 6 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 12 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

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
sri.ns.cloudflare.com 172.64.33.234NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
sri.ns.cloudflare.com 108.162.193.234NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
sri.ns.cloudflare.com 173.245.59.234NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
sri.ns.cloudflare.com 2606:4700:58::adf5:3beaNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
sri.ns.cloudflare.com 2a06:98c1:50::ac40:21eaNOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
sri.ns.cloudflare.com 2803:f800:50::6ca2:c1eaNOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
tina.ns.cloudflare.com 172.64.32.230NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
tina.ns.cloudflare.com 108.162.192.230NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
tina.ns.cloudflare.com 173.245.58.230NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
tina.ns.cloudflare.com 2606:4700:50::adf5:3ae6NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
tina.ns.cloudflare.com 2a06:98c1:50::ac40:20e6NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
tina.ns.cloudflare.com 2803:f800:50::6ca2:c0e6NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2

Checks

  • ✓ All respond #14
    All 12 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: sri.ns.cloudflare.com: "2026.10.2"; tina.ns.cloudflare.com: "2026.10.2". 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 2418080333 · primary sri.ns.cloudflare.com

Found

Primary (MNAME)
sri.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2418080333
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
sri.ns.cloudflare.com (172.64.33.234)2418080333
sri.ns.cloudflare.com (108.162.193.234)2418080333
sri.ns.cloudflare.com (173.245.59.234)2418080333
sri.ns.cloudflare.com (2606:4700:58::adf5:3bea)2418080333
sri.ns.cloudflare.com (2a06:98c1:50::ac40:21ea)2418080333
sri.ns.cloudflare.com (2803:f800:50::6ca2:c1ea)2418080333
tina.ns.cloudflare.com (172.64.32.230)2418080333
tina.ns.cloudflare.com (108.162.192.230)2418080333
tina.ns.cloudflare.com (173.245.58.230)2418080333
tina.ns.cloudflare.com (2606:4700:50::adf5:3ae6)2418080333
tina.ns.cloudflare.com (2a06:98c1:50::ac40:20e6)2418080333
tina.ns.cloudflare.com (2803:f800:50::6ca2:c0e6)2418080333

Checks

  • ✓ Serial 2418080333 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h46m40s, retry 40m, expire 7d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver sri.ns.cloudflare.com is one of the listed nameservers.
  • ✓ Contact dns@cloudflare.com #25
    The SOA RNAME dns.cloudflare.com means dns@cloudflare.com.
  • ✓ Timestamp serial #26
    The serial 2418080333 is a Unix timestamp (2046-08-17 00:58 UTC).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Signatures valid until
22 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
2371ECDSAP256SHA256 (13)SHA256 5CC28918A26D1ED3…yes

DNSKEY in the zone

Key tagRoleAlgorithm
2371KSK (257)ECDSAP256SHA256 (13)
34505ZSK (256)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 2371 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 50h0m0s and created on demand; the current one was made at 2026-10-20 21:06 UTC and expires at 2026-10-22 23:06 UTC.

Records

info

22 records at the apex

Found

Read from
172.64.33.234:53
TypeValueTTL
SOAsri.ns.cloudflare.com. dns.cloudflare.com. 2418080333 10000 2400 604800 18001800
NSsri.ns.cloudflare.com.86400
NStina.ns.cloudflare.com.86400
A172.67.69.7300
A104.26.12.180300
A104.26.13.180300
AAAA2606:4700:20::ac43:4507300
AAAA2606:4700:20::681a:db4300
AAAA2606:4700:20::681a:cb4300
MX0 caseking-de.mail.protection.outlook.com.300
TXT"00DMz000000Kmy9=1TBMz00000005Nt"60
TXT"Sendinblue-code:be02f955ce1c613f9fbe7fb2d7331f8d"60
TXT"amazon-business-verification=1006ca7d4de8430707a88e16e0de8a35ea1f06a618095121d8ae8a35b33bc6bc"60
TXT"anthropic-domain-verification-3pa829=jnP5wmZY86C2RwDUcrfUSHsks"60
TXT"apple-domain-verification=3e0UAaf9F3u6mNL8"60
TXT"brevo-code:7767e4c59ea16a7b888dde1bbc37addd"60
TXT"google-site-verification=0f4fJA_aieEblOIbetj3RGthOElK83oEXNS8MKDcUz0"60
TXT"google-site-verification=KS3DeM1UjAhr3QHjvpH-OMU7-O6nqbBeI9Im5u09aF4"60
TXT"google-site-verification=Tss4zuAQRuOv-EIcuvP9C2hQH4oaRBzNI7e0nhcx-2s"60
TXT"prowly-verification=91617f61c911538d1c061375f578dfdc4cd9a13d4f44b5f8456c4b57eab15aac"60
TXT"sfcc_verification_bkrr=d86fd270087d1a4853a8b413acc2ceb4bd8530d5afbe83f66bb7bb4854c069ee"60
TXT"v=spf1 include:_spf.google.com include:spf.protection.outlook.com include:spf.mailjet.com include:spf.srv2.de include:mail.zendesk.com include:spf-es.prowly.com ip4:109.71.72.192 ip6:2a05:cc00::72:192:10 a:production.eu01.progamers.demandware.net -all"60

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 5m, NS 1d.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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