knipex.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

memphis.ns.cloudflare.com, roxy.ns.cloudflare.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
memphis.ns.cloudflare.com, roxy.ns.cloudflare.com
NS in the zone
memphis.ns.cloudflare.com, roxy.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
memphis.ns.cloudflare.com172.64.35.189 162.159.44.189 108.162.195.189 2a06:98c1:50::ac40:23bd 2606:4700:58::a29f:2cbd 2803:f800:50::6ca2:c3bdAS13335 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-
roxy.ns.cloudflare.com172.64.32.142 108.162.192.142 173.245.58.142 2606:4700:50::adf5:3a8e 2a06:98c1:50::ac40:208e 2803:f800:50::6ca2:c08eAS13335 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: memphis.ns.cloudflare.com, roxy.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
memphis.ns.cloudflare.com 172.64.35.189NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
memphis.ns.cloudflare.com 162.159.44.189NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
memphis.ns.cloudflare.com 108.162.195.189NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
memphis.ns.cloudflare.com 2a06:98c1:50::ac40:23bdNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
memphis.ns.cloudflare.com 2606:4700:58::a29f:2cbdNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
memphis.ns.cloudflare.com 2803:f800:50::6ca2:c3bdNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
roxy.ns.cloudflare.com 172.64.32.142NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
roxy.ns.cloudflare.com 108.162.192.142NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
roxy.ns.cloudflare.com 173.245.58.142NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
roxy.ns.cloudflare.com 2606:4700:50::adf5:3a8eNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
roxy.ns.cloudflare.com 2a06:98c1:50::ac40:208eNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
roxy.ns.cloudflare.com 2803:f800:50::6ca2:c08eNOERROR, 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: memphis.ns.cloudflare.com: "2026.10.2"; roxy.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 2418035341 · primary memphis.ns.cloudflare.com

Found

Primary (MNAME)
memphis.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2418035341
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
memphis.ns.cloudflare.com (172.64.35.189)2418035341
memphis.ns.cloudflare.com (162.159.44.189)2418035341
memphis.ns.cloudflare.com (108.162.195.189)2418035341
memphis.ns.cloudflare.com (2a06:98c1:50::ac40:23bd)2418035341
memphis.ns.cloudflare.com (2606:4700:58::a29f:2cbd)2418035341
memphis.ns.cloudflare.com (2803:f800:50::6ca2:c3bd)2418035341
roxy.ns.cloudflare.com (172.64.32.142)2418035341
roxy.ns.cloudflare.com (108.162.192.142)2418035341
roxy.ns.cloudflare.com (173.245.58.142)2418035341
roxy.ns.cloudflare.com (2606:4700:50::adf5:3a8e)2418035341
roxy.ns.cloudflare.com (2a06:98c1:50::ac40:208e)2418035341
roxy.ns.cloudflare.com (2803:f800:50::6ca2:c08e)2418035341

Checks

  • ✓ Serial 2418035341 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 memphis.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 2418035341 is a Unix timestamp (2046-08-16 12:29 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

23 records at the apex

Found

Read from
172.64.35.189:53
TypeValueTTL
SOAmemphis.ns.cloudflare.com. dns.cloudflare.com. 2418035341 10000 2400 604800 18001800
NSmemphis.ns.cloudflare.com.86400
NSroxy.ns.cloudflare.com.86400
A172.67.70.241300
A104.26.2.29300
A104.26.3.29300
AAAA2606:4700:20::ac43:46f1300
AAAA2606:4700:20::681a:21d300
AAAA2606:4700:20::681a:31d300
MX10 mx01.hornetsecurity.com.60
MX20 mx02.hornetsecurity.com.60
MX30 mx03.hornetsecurity.com.60
MX40 mx04.hornetsecurity.com.60
TXT"MS=ms55279255"60
TXT"anthropic-domain-verification-yn2ch0=O6u2KBrJJHiqknhUSQjoDZbjv"60
TXT"apple-domain-verification=iIEffoZe0Sa5bnP7"60
TXT"atlassian-domain-verification=eA1fOKvXe3/TOvgZeCBYZLMgtBdRDgrl42xB6i82MBIdB/2an3YZGnllEMOAn2fE"60
TXT"facebook-domain-verification=vo61dtu1p8mdgkgbb7ufdv4x4udgiy"60
TXT"google-site-verification=avBUWup2w13cATN1vyxyW3K7nfAyzjDg6499YrG78LQ"60
TXT"google-site-verification=fSp6S1FXvOThlUHr2Ih3l8iQeaX_JTszRhSwXiiksnI"60
TXT"nintex.5ee9c66951916a0019242872"60
TXT"nintex.602299d55ea3d600710f5c3f"60
TXT"v=spf1 ip4:91.26.91.232/29 ip4:91.26.102.152/29 ip4:83.135.51.72/29 include:spf.send.knipex.de include:spf.protection.outlook.com include:spf.eu.signature365.net include:_spf.salesforce.com include:amazonses.com include:_spf.cmail.ondemand.com include:spf" ".hornetsecurity.com -all"60

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: MX (1m). 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