luebeck-tourismus.de

Checked 21 October 2026, 23:20 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

alla.ns.cloudflare.com, amir.ns.cloudflare.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
alla.ns.cloudflare.com, amir.ns.cloudflare.com
NS in the zone
alla.ns.cloudflare.com, amir.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
alla.ns.cloudflare.com172.64.32.62 173.245.58.62 108.162.192.62 2803:f800:50::6ca2:c03e 2a06:98c1:50::ac40:203e 2606:4700:50::adf5:3a3eAS13335 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-
amir.ns.cloudflare.com108.162.193.62 173.245.59.62 172.64.33.62 2a06:98c1:50::ac40:213e 2803:f800:50::6ca2:c13e 2606:4700:58::adf5:3b3eAS13335 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: alla.ns.cloudflare.com, amir.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
alla.ns.cloudflare.com 172.64.32.62NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
alla.ns.cloudflare.com 173.245.58.62NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
alla.ns.cloudflare.com 108.162.192.62NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
alla.ns.cloudflare.com 2803:f800:50::6ca2:c03eNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
alla.ns.cloudflare.com 2a06:98c1:50::ac40:203eNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
alla.ns.cloudflare.com 2606:4700:50::adf5:3a3eNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
amir.ns.cloudflare.com 108.162.193.62NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
amir.ns.cloudflare.com 173.245.59.62NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
amir.ns.cloudflare.com 172.64.33.62NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
amir.ns.cloudflare.com 2a06:98c1:50::ac40:213eNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
amir.ns.cloudflare.com 2803:f800:50::6ca2:c13eNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
amir.ns.cloudflare.com 2606:4700:58::adf5:3b3eNOERROR, 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: alla.ns.cloudflare.com: "2026.10.2"; amir.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 2418029946 · primary alla.ns.cloudflare.com

Found

Primary (MNAME)
alla.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2418029946
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
alla.ns.cloudflare.com (172.64.32.62)2418029946
alla.ns.cloudflare.com (173.245.58.62)2418029946
alla.ns.cloudflare.com (108.162.192.62)2418029946
alla.ns.cloudflare.com (2803:f800:50::6ca2:c03e)2418029946
alla.ns.cloudflare.com (2a06:98c1:50::ac40:203e)2418029946
alla.ns.cloudflare.com (2606:4700:50::adf5:3a3e)2418029946
amir.ns.cloudflare.com (108.162.193.62)2418029946
amir.ns.cloudflare.com (173.245.59.62)2418029946
amir.ns.cloudflare.com (172.64.33.62)2418029946
amir.ns.cloudflare.com (2a06:98c1:50::ac40:213e)2418029946
amir.ns.cloudflare.com (2803:f800:50::6ca2:c13e)2418029946
amir.ns.cloudflare.com (2606:4700:58::adf5:3b3e)2418029946

Checks

  • ✓ Serial 2418029946 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 alla.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 2418029946 is a Unix timestamp (2046-08-16 10:59 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

12 records at the apex

Found

Read from
172.64.32.62:53
TypeValueTTL
SOAalla.ns.cloudflare.com. dns.cloudflare.com. 2418029946 10000 2400 604800 18001800
NSalla.ns.cloudflare.com.86400
NSamir.ns.cloudflare.com.86400
A23.88.106.2260
AAAA2a01:4f8:1c1b:6a8e::160
MX10 mx01.antispammaus.com.300
MX30 mx02.antispammaus.com.300
MX40 mx03.antispammaus.com.300
TXT"MS=ms13598296"300
TXT"hetzner-verify-2024-10-23-4h7EbG+r/J37=BbC"300
TXT"v=DKIM1; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDEVLdj+jwWoZD+Dmum7Qt34VvcCpwHKvhnpaQ0I3u9mi8Ha6nWUa6WILuB6BsXYRXdgcFjUkSDyhvsJGY0iap8bszXRLzxWjhKGuKZmXMTANGro77jN0xsRhuKoTFmfJ7UDxNTvCdcItcS9ZTBvInwBK+utdwUav2kk4OogS9dDwIDAQAB"300
TXT"v=spf1 a:smtpout.luebeck-tourismus.de ip4:62.116.174.151 ip4:85.214.56.99 ip4:23.88.106.22 ip6:2a01:4f8:1c1b:6a8e::1 include:spf.mailjet.com ~all"300

Checks

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