gruen-berlin.de

Checked 21 October 2026, 22:41 UTC · via 8.8.8.8
!Passed with warnings
21 passed 2 warnings 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

gannon.ns.cloudflare.com, kate.ns.cloudflare.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
gannon.ns.cloudflare.com, kate.ns.cloudflare.com
NS in the zone
gannon.ns.cloudflare.com, kate.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
gannon.ns.cloudflare.com108.162.195.59 172.64.35.59 162.159.44.59 2803:f800:50::6ca2:c33b 2606:4700:58::a29f:2c3b 2a06:98c1:50::ac40:233bAS13335 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-
kate.ns.cloudflare.com172.64.32.124 108.162.192.124 173.245.58.124 2a06:98c1:50::ac40:207c 2606:4700:50::adf5:3a7c 2803:f800:50::6ca2:c07cAS13335 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: gannon.ns.cloudflare.com, kate.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
gannon.ns.cloudflare.com 108.162.195.59NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
gannon.ns.cloudflare.com 172.64.35.59NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
gannon.ns.cloudflare.com 162.159.44.59NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
gannon.ns.cloudflare.com 2803:f800:50::6ca2:c33bNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
gannon.ns.cloudflare.com 2606:4700:58::a29f:2c3bNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
gannon.ns.cloudflare.com 2a06:98c1:50::ac40:233bNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kate.ns.cloudflare.com 172.64.32.124NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
kate.ns.cloudflare.com 108.162.192.124NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
kate.ns.cloudflare.com 173.245.58.124NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kate.ns.cloudflare.com 2a06:98c1:50::ac40:207cNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kate.ns.cloudflare.com 2606:4700:50::adf5:3a7cNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kate.ns.cloudflare.com 2803:f800:50::6ca2:c07cNOERROR, 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: gannon.ns.cloudflare.com: "2026.10.2"; kate.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 2417983767 · primary gannon.ns.cloudflare.com

Found

Primary (MNAME)
gannon.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417983767
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
gannon.ns.cloudflare.com (108.162.195.59)2417983767
gannon.ns.cloudflare.com (172.64.35.59)2417983767
gannon.ns.cloudflare.com (162.159.44.59)2417983767
gannon.ns.cloudflare.com (2803:f800:50::6ca2:c33b)2417983767
gannon.ns.cloudflare.com (2606:4700:58::a29f:2c3b)2417983767
gannon.ns.cloudflare.com (2a06:98c1:50::ac40:233b)2417983767
kate.ns.cloudflare.com (172.64.32.124)2417983767
kate.ns.cloudflare.com (108.162.192.124)2417983767
kate.ns.cloudflare.com (173.245.58.124)2417983767
kate.ns.cloudflare.com (2a06:98c1:50::ac40:207c)2417983767
kate.ns.cloudflare.com (2606:4700:50::adf5:3a7c)2417983767
kate.ns.cloudflare.com (2803:f800:50::6ca2:c07c)2417983767

Checks

  • ✓ Serial 2417983767 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 gannon.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 2417983767 is a Unix timestamp (2046-08-15 22:09 UTC).

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

info

26 records at the apex

Found

Read from
108.162.195.59:53
TypeValueTTL
SOAgannon.ns.cloudflare.com. dns.cloudflare.com. 2417983767 10000 2400 604800 18001800
NSgannon.ns.cloudflare.com.86400
NSkate.ns.cloudflare.com.86400
A104.26.2.236300
A104.26.3.236300
A172.67.73.61300
AAAA2606:4700:20::681a:2ec300
AAAA2606:4700:20::681a:3ec300
AAAA2606:4700:20::ac43:493d300
MX0 gruenberlin-de01c.mail.protection.outlook.com.300
TXT"atlassian-sending-domain-verification=96511d20-957a-4485-a715-5a2928ae80b0"300
TXT"google-site-verification=8Wyxe3JxjFa-ECUg-s0fflv78M1d5ndQFCyV7n8m1Lc"300
TXT"google-site-verification=PkAdJRGkwzthNJkpGtGKQfX3afLinlMOUmF1-vmES5c"300
TXT"google-site-verification=jcWtn9JWNuA9NiGuXzfOwjpUpGJXcNvYFq2VXG-hiDc"300
TXT"sendinblue-code:8a56a7b92e76de3ef9baa34e5470ec7e"300
TXT"v=spf1 ip4:91.203.200.74/32 include:spf.protection.outlook.com include:spf.sendinblue.com include:email.freshdesk.com -all"300
CAA0 issue "comodoca.com"3600
CAA0 issue "digicert.com; cansignhttpexchanges=yes"3600
CAA0 issue "letsencrypt.org"3600
CAA0 issue "pki.goog; cansignhttpexchanges=yes"3600
CAA0 issue "ssl.com"3600
CAA0 issuewild "comodoca.com"3600
CAA0 issuewild "digicert.com; cansignhttpexchanges=yes"3600
CAA0 issuewild "letsencrypt.org"3600
CAA0 issuewild "pki.goog; cansignhttpexchanges=yes"3600
CAA0 issuewild "ssl.com"3600

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
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com.