knauf.de

Checked 21 October 2026, 23:10 UTC · via 8.8.8.8
!Passed with warnings
20 passed 3 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

aaron.ns.cloudflare.com, virginia.ns.cloudflare.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
aaron.ns.cloudflare.com, virginia.ns.cloudflare.com
NS in the zone
aaron.ns.cloudflare.com, virginia.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
aaron.ns.cloudflare.com162.159.44.150 108.162.195.150 172.64.35.150 2803:f800:50::6ca2:c396 2a06:98c1:50::ac40:2396 2606:4700:58::a29f:2c96AS13335 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-
virginia.ns.cloudflare.com172.64.34.37 108.162.194.37 162.159.38.37 2606:4700:50::a29f:2625 2a06:98c1:50::ac40:2225 2803:f800:50::6ca2:c225AS13335 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: aaron.ns.cloudflare.com, virginia.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
aaron.ns.cloudflare.com 162.159.44.150NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
aaron.ns.cloudflare.com 108.162.195.150NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
aaron.ns.cloudflare.com 172.64.35.150NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
aaron.ns.cloudflare.com 2803:f800:50::6ca2:c396NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
aaron.ns.cloudflare.com 2a06:98c1:50::ac40:2396NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
aaron.ns.cloudflare.com 2606:4700:58::a29f:2c96NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
virginia.ns.cloudflare.com 172.64.34.37NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
virginia.ns.cloudflare.com 108.162.194.37NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
virginia.ns.cloudflare.com 162.159.38.37NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
virginia.ns.cloudflare.com 2606:4700:50::a29f:2625NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
virginia.ns.cloudflare.com 2a06:98c1:50::ac40:2225NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
virginia.ns.cloudflare.com 2803:f800:50::6ca2:c225NOERROR, 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: aaron.ns.cloudflare.com: "2026.10.2"; virginia.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 2417898034 · primary aaron.ns.cloudflare.com

Found

Primary (MNAME)
aaron.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417898034
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
aaron.ns.cloudflare.com (162.159.44.150)2417898034
aaron.ns.cloudflare.com (108.162.195.150)2417898034
aaron.ns.cloudflare.com (172.64.35.150)2417898034
aaron.ns.cloudflare.com (2803:f800:50::6ca2:c396)2417898034
aaron.ns.cloudflare.com (2a06:98c1:50::ac40:2396)2417898034
aaron.ns.cloudflare.com (2606:4700:58::a29f:2c96)2417898034
virginia.ns.cloudflare.com (172.64.34.37)2417898034
virginia.ns.cloudflare.com (108.162.194.37)2417898034
virginia.ns.cloudflare.com (162.159.38.37)2417898034
virginia.ns.cloudflare.com (2606:4700:50::a29f:2625)2417898034
virginia.ns.cloudflare.com (2a06:98c1:50::ac40:2225)2417898034
virginia.ns.cloudflare.com (2803:f800:50::6ca2:c225)2417898034

Checks

  • ✓ Serial 2417898034 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 aaron.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 2417898034 is a Unix timestamp (2046-08-14 22:20 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

warn

27 records at the apex

Found

Read from
162.159.44.150:53
TypeValueTTL
SOAaaron.ns.cloudflare.com. dns.cloudflare.com. 2417898034 10000 2400 604800 18001800
NSaaron.ns.cloudflare.com.86400
NSvirginia.ns.cloudflare.com.86400
A104.18.32.19300
A172.64.155.237300
AAAA2606:4700:4402::ac40:9bed300
AAAA2606:4700:4409::6812:2013300
MX10 mailstream-eu1.mxrecord.io.30
TXT"00D0X000000tBFD=1TBTy00000000rN"30
TXT"1756be649d51b48a69b958b3d8a3921b"30
TXT"MS=ms26527196"30
TXT"MS=ms55661727"30
TXT"_globalsign-domain-verification=EU_1TyV1uM2UV_00U5z2i31lLWsPxGD5cdihmjEx9F"30
TXT"_globalsign-domain-verification=Hhf1p8CzeUlS5Gw2fD_lWBsQbZfmP09yVlip1m0HVA"30
TXT"_globalsign-domain-verification=ZqLjyj60vuUiJfNzR78cwSeKi43PlvJVx3vEoyakZH"30
TXT"_globalsign-domain-verification=s8Y6QiQ5UMKJyW_HfNJ8jr4RBdYy06tVD85Q78uOsx"30
TXT"adobe-idp-site-verification=d04a867d1bf7208af1d94176eb8572b5bc02de0f7f2788cf27fbba2467f69ef2"30
TXT"apple-domain-verification=kJ2l9Pkiqeuy5cFC"30
TXT"atlassian-domain-verification=70GqHrluIKB0DlW53dSuqFSbFlhlfZlApKbP2E3g3PR8EoOJNkl/coLmRJK97vOn"30
TXT"gNVb5qYdFQrJWGkY6OzDgs5owJqO0xMr+q2EM0FbBO+wUX1yu/35+4KX3ac0umd93VahbaB+TN8xrM6srlSULA=="30
TXT"google-site-verification=j7tDzJIGBACWfkO9KMULLoUQhgnXkfMKYE5ylC8WQwg"30
TXT"miro-verification=72ff53054bd883f89f1694fea716d84ce0e88228"30
TXT"pardot874711=0cfae5dc7f63eba370027c894d887fb1503577667633224836fd99f3b689d17b"30
TXT"pardot874711=7c5c63465505a0113ddb300a4753d51a28c4ba5b3f77385042afd7a0aafe27be"30
TXT"teamtailor=1756be649d51b48a69b958b3d8a3921b"30
TXT"teamtailor=abeeb36fa98b955edefc9b9bedfe746f"30
TXT"v=spf1 a:mail.bechtlecloud.com a:c.spf.service-now.com include:spf.protection.outlook.com include:sendgrid.net include:_spf.salesforce.com include:spf-mailer-knauf.aufwind-solutions.de include:et._spf.pardot.com include:amazonses.com ip4:31.220.120.101 ip" "4:18.192.112.255 ip4:82.210.238.38 ip4:82.210.238.39 ip4:212.2.66.147 ip4:157.90.94.187 ip4:185.183.157.187 ip6:2a01:488:67:1000:5bfa:511a::1 -all"30

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: MX (30s). 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