blick.de

Checked 21 October 2026, 21:48 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 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

brit.ns.cloudflare.com, leonard.ns.cloudflare.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
brit.ns.cloudflare.com, leonard.ns.cloudflare.com
NS in the zone
brit.ns.cloudflare.com, leonard.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
brit.ns.cloudflare.com173.245.58.78 108.162.192.78 172.64.32.78 2803:f800:50::6ca2:c04e 2606:4700:50::adf5:3a4e 2a06:98c1:50::ac40:204eAS13335 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-
leonard.ns.cloudflare.com108.162.195.54 172.64.35.54 162.159.44.54 2606:4700:58::a29f:2c36 2a06:98c1:50::ac40:2336 2803:f800:50::6ca2:c336AS13335 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: brit.ns.cloudflare.com, leonard.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
brit.ns.cloudflare.com 173.245.58.78NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
brit.ns.cloudflare.com 108.162.192.78NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
brit.ns.cloudflare.com 172.64.32.78NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
brit.ns.cloudflare.com 2803:f800:50::6ca2:c04eNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
brit.ns.cloudflare.com 2606:4700:50::adf5:3a4eNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
brit.ns.cloudflare.com 2a06:98c1:50::ac40:204eNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
leonard.ns.cloudflare.com 108.162.195.54NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
leonard.ns.cloudflare.com 172.64.35.54NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
leonard.ns.cloudflare.com 162.159.44.54NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
leonard.ns.cloudflare.com 2606:4700:58::a29f:2c36NOERROR, 20 ms, authoritativenoyes / yesrefused2026.10.2
leonard.ns.cloudflare.com 2a06:98c1:50::ac40:2336NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
leonard.ns.cloudflare.com 2803:f800:50::6ca2:c336NOERROR, 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: brit.ns.cloudflare.com: "2026.10.2"; leonard.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 2417534831 · primary brit.ns.cloudflare.com

Found

Primary (MNAME)
brit.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417534831
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
brit.ns.cloudflare.com (173.245.58.78)2417534831
brit.ns.cloudflare.com (108.162.192.78)2417534831
brit.ns.cloudflare.com (172.64.32.78)2417534831
brit.ns.cloudflare.com (2803:f800:50::6ca2:c04e)2417534831
brit.ns.cloudflare.com (2606:4700:50::adf5:3a4e)2417534831
brit.ns.cloudflare.com (2a06:98c1:50::ac40:204e)2417534831
leonard.ns.cloudflare.com (108.162.195.54)2417534831
leonard.ns.cloudflare.com (172.64.35.54)2417534831
leonard.ns.cloudflare.com (162.159.44.54)2417534831
leonard.ns.cloudflare.com (2606:4700:58::a29f:2c36)2417534831
leonard.ns.cloudflare.com (2a06:98c1:50::ac40:2336)2417534831
leonard.ns.cloudflare.com (2803:f800:50::6ca2:c336)2417534831

Checks

  • ✓ Serial 2417534831 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 brit.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 2417534831 is a Unix timestamp (2046-08-10 17:27 UTC).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
22 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
2371ECDSAP256SHA256 (13)SHA256 314926F2FB095789…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 20:48 UTC and expires at 2026-10-22 22:48 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

12 records at the apex

Found

Read from
173.245.58.78:53
TypeValueTTL
SOAbrit.ns.cloudflare.com. dns.cloudflare.com. 2417534831 10000 2400 604800 18001800
NSbrit.ns.cloudflare.com.86400
NSleonard.ns.cloudflare.com.86400
A194.25.232.75180
MX5 blick-de.mail.protection.outlook.com.180
TXT"IrVGprJg1alszLHD7XSfCKnnXWl9yq7sqzHyyEh6ZA0ewdEPa2eNGXE8MBz5gDWLiOSkE6tXIszBjRl+VDvwyg=="180
TXT"MS=ms88911663"180
TXT"_telesec-domain-validation=354671_2025-11-04_rujwV16JeVIDKUGu7ajoidxghwmdv38YQw22hFSjf8W6BeWUoO"180
TXT"google-site-verification=uHe5_JFxi2a2aB9XcQ4lPcWyiNxhb0wFCPpZPlr8DgE"180
TXT"hibp-verify=dweb_4u06q4kwta1u5p6ctvzughg4"180
TXT"swisssign-check=ciRDqYw-eRIh0yM0d6er_l8CbkY"180
TXT"v=spf1 a mx include:spf.protection.outlook.com ip4:18.196.115.44/32 ip4:85.25.144.72/32 ip4:194.25.232.109/32 ip4:194.25.232.110/32 include:spf.mxg.cloud ~all"180

Checks

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