bad-homburg.de

Checked 21 October 2026, 21:34 UTC · via 8.8.8.8
!Passed with warnings
19 passed 3 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

patrick.ns.cloudflare.com, surina.ns.cloudflare.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
patrick.ns.cloudflare.com, surina.ns.cloudflare.com
NS in the zone
patrick.ns.cloudflare.com, surina.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
patrick.ns.cloudflare.com162.159.44.200 172.64.35.200 108.162.195.200 2606:4700:58::a29f:2cc8 2a06:98c1:50::ac40:23c8 2803:f800:50::6ca2:c3c8AS13335 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-
surina.ns.cloudflare.com108.162.194.19 172.64.34.19 162.159.38.19 2a06:98c1:50::ac40:2213 2803:f800:50::6ca2:c213 2606:4700:50::a29f:2613AS13335 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: patrick.ns.cloudflare.com, surina.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
patrick.ns.cloudflare.com 162.159.44.200NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
patrick.ns.cloudflare.com 172.64.35.200NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
patrick.ns.cloudflare.com 108.162.195.200NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
patrick.ns.cloudflare.com 2606:4700:58::a29f:2cc8NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
patrick.ns.cloudflare.com 2a06:98c1:50::ac40:23c8NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
patrick.ns.cloudflare.com 2803:f800:50::6ca2:c3c8NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
surina.ns.cloudflare.com 108.162.194.19NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
surina.ns.cloudflare.com 172.64.34.19NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
surina.ns.cloudflare.com 162.159.38.19NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
surina.ns.cloudflare.com 2a06:98c1:50::ac40:2213NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
surina.ns.cloudflare.com 2803:f800:50::6ca2:c213NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
surina.ns.cloudflare.com 2606:4700:50::a29f:2613NOERROR, 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: patrick.ns.cloudflare.com: "2026.10.2"; surina.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 2416779476 · primary patrick.ns.cloudflare.com

Found

Primary (MNAME)
patrick.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2416779476
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
patrick.ns.cloudflare.com (162.159.44.200)2416779476
patrick.ns.cloudflare.com (172.64.35.200)2416779476
patrick.ns.cloudflare.com (108.162.195.200)2416779476
patrick.ns.cloudflare.com (2606:4700:58::a29f:2cc8)2416779476
patrick.ns.cloudflare.com (2a06:98c1:50::ac40:23c8)2416779476
patrick.ns.cloudflare.com (2803:f800:50::6ca2:c3c8)2416779476
surina.ns.cloudflare.com (108.162.194.19)2416779476
surina.ns.cloudflare.com (172.64.34.19)2416779476
surina.ns.cloudflare.com (162.159.38.19)2416779476
surina.ns.cloudflare.com (2a06:98c1:50::ac40:2213)2416779476
surina.ns.cloudflare.com (2803:f800:50::6ca2:c213)2416779476
surina.ns.cloudflare.com (2606:4700:50::a29f:2613)2416779476

Checks

  • ✓ Serial 2416779476 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 patrick.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 2416779476 is a Unix timestamp (2046-08-01 23:37 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

16 records at the apex

Found

Read from
162.159.44.200:53
TypeValueTTL
SOApatrick.ns.cloudflare.com. dns.cloudflare.com. 2416779476 10000 2400 604800 18001800
NSpatrick.ns.cloudflare.com.86400
NSsurina.ns.cloudflare.com.86400
A5.75.247.65300
MX10 badhomburg-de0i.mail.protection.outlook.com.60
TXT"2ack8umm_20210311"300
TXT"MS=5393842AE4D6381060ADED3381002FD8DAD4383C"300
TXT"MS=B60CCA9B3E2767A6DDB9D4932200C751599BA3B3"300
TXT"MS=ms11171474"300
TXT"Pj1kosi8Iq+C3ZFvVdJS5EoJtwJHaEox11Hn+pmAC3cssSH6ZThEAJhefaB6Nkk+IJ9Cxpz/PYL0tFpw3XHRRw=="300
TXT"_r2buqwfl1wnlyvyg9ahhv1qmid6p2qh"300
TXT"apple-domain-verification=94rr82EtknI4Z6mg"300
TXT"ibpezaxxuvEZSBgXbkMKNnMhGo7JXrqE5nocJCrO2U7mH+hGzLmXr+FpnCmRmvKK5Na/t8yiiNhucc6Rhvv4iw=="300
TXT"sophos-domain-verification=458beb828bb86ddfe27471d501318c032110edb52f9cfa995734232a1a3564f7"300
TXT"swisssign-check=fXNSYH-q7VPfQfXTTBdHc5157pQ"300
TXT"v=spf1 a ip4:195.243.242.147 ip4:195.243.242.195 a:mail01.fb37bhg.de a:mail02.fb37bhg.de ip4:5.75.247.65 ip4:62.214.70.173 ip4:195.243.242.165 ip4:195.243.242.158 ip4:52.157.149.216 include:ekom21.de include:spf.protection.outlook.com include:spf.eu.excla" "imer.net include:spf-de.emailsignatures365.com a:otc-de-spf.mms.t-systems-service.com include:spf.info-online.org ~all"300

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.
  • 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
  • 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