businessbike.de

Checked 21 October 2026, 22:00 UTC · via 8.8.8.8
!Passed with warnings
25 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

dora.ns.cloudflare.com, tosana.ns.cloudflare.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dora.ns.cloudflare.com, tosana.ns.cloudflare.com
NS in the zone
dora.ns.cloudflare.com, tosana.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
dora.ns.cloudflare.com173.245.58.108 172.64.32.108 108.162.192.108 2803:f800:50::6ca2:c06c 2a06:98c1:50::ac40:206c 2606:4700:50::adf5:3a6cAS13335 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-
tosana.ns.cloudflare.com108.162.195.43 172.64.35.43 162.159.44.43 2803:f800:50::6ca2:c32b 2a06:98c1:50::ac40:232b 2606:4700:58::a29f:2c2bAS13335 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: dora.ns.cloudflare.com, tosana.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
dora.ns.cloudflare.com 173.245.58.108NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
dora.ns.cloudflare.com 172.64.32.108NOERROR, 18 ms, authoritativenoyes / yesrefused2026.10.2
dora.ns.cloudflare.com 108.162.192.108NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
dora.ns.cloudflare.com 2803:f800:50::6ca2:c06cNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
dora.ns.cloudflare.com 2a06:98c1:50::ac40:206cNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
dora.ns.cloudflare.com 2606:4700:50::adf5:3a6cNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
tosana.ns.cloudflare.com 108.162.195.43NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
tosana.ns.cloudflare.com 172.64.35.43NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
tosana.ns.cloudflare.com 162.159.44.43NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
tosana.ns.cloudflare.com 2803:f800:50::6ca2:c32bNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
tosana.ns.cloudflare.com 2a06:98c1:50::ac40:232bNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
tosana.ns.cloudflare.com 2606:4700:58::a29f:2c2bNOERROR, 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: dora.ns.cloudflare.com: "2026.10.2"; tosana.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 2417682217 · primary dora.ns.cloudflare.com

Found

Primary (MNAME)
dora.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417682217
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
dora.ns.cloudflare.com (173.245.58.108)2417682217
dora.ns.cloudflare.com (172.64.32.108)2417682217
dora.ns.cloudflare.com (108.162.192.108)2417682217
dora.ns.cloudflare.com (2803:f800:50::6ca2:c06c)2417682217
dora.ns.cloudflare.com (2a06:98c1:50::ac40:206c)2417682217
dora.ns.cloudflare.com (2606:4700:50::adf5:3a6c)2417682217
tosana.ns.cloudflare.com (108.162.195.43)2417682217
tosana.ns.cloudflare.com (172.64.35.43)2417682217
tosana.ns.cloudflare.com (162.159.44.43)2417682217
tosana.ns.cloudflare.com (2803:f800:50::6ca2:c32b)2417682217
tosana.ns.cloudflare.com (2a06:98c1:50::ac40:232b)2417682217
tosana.ns.cloudflare.com (2606:4700:58::a29f:2c2b)2417682217

Checks

  • ✓ Serial 2417682217 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 dora.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 2417682217 is a Unix timestamp (2046-08-12 10:23 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 E63BBF33AAA77607…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 21:00 UTC and expires at 2026-10-22 23:00 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

info

22 records at the apex

Found

Read from
173.245.58.108:53
TypeValueTTL
SOAdora.ns.cloudflare.com. dns.cloudflare.com. 2417682217 10000 2400 604800 18001800
NSdora.ns.cloudflare.com.86400
NStosana.ns.cloudflare.com.86400
A141.101.90.104300
A141.101.90.106300
A141.101.90.107300
A141.101.90.105300
AAAA2a06:98c1:3200::90:81300
AAAA2a06:98c1:3200::90:80300
AAAA2a06:98c1:3200::90:83300
AAAA2a06:98c1:3200::90:82300
MX1 aspmx.l.google.com.300
MX10 alt3.aspmx.l.google.com.300
MX10 alt4.aspmx.l.google.com.300
MX5 alt1.aspmx.l.google.com.300
MX5 alt2.aspmx.l.google.com.300
TXT"MS=ms27047816"300
TXT"asv=6737b68f3e9ce5d95a6c48769075b354"300
TXT"atlassian-domain-verification=O7oy7hA43zGjao8ARPFPn9YsCCJP8/oX1jpa5gpeL0lS9jhZTDB2pSq3RBKrBNTc"300
TXT"facebook-domain-verification=ejmwhfvmz3g5iajbyr4g5tzcurkklz"300
TXT"google-site-verification=Qa2HV6qn_YqgnGgohme1x1l2o3Ab5NVuWzlEIOekDXk"300
TXT"v=spf1 mx include:amazonses.com include:_spf.zimpel.de include:_spf.google.com include:_spf.rexx-systems.com include:5127382.spf05.hubspotemail.net include:mail.zendesk.com -all"300

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.
  • ✓ 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