flaschenpost.de

Checked 21 October 2026, 22:30 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

matt.ns.cloudflare.com, roxy.ns.cloudflare.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
matt.ns.cloudflare.com, roxy.ns.cloudflare.com
NS in the zone
matt.ns.cloudflare.com, roxy.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
matt.ns.cloudflare.com108.162.193.131 173.245.59.131 172.64.33.131 2a06:98c1:50::ac40:2183 2803:f800:50::6ca2:c183 2606:4700:58::adf5:3b83AS13335 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.com173.245.58.142 172.64.32.142 108.162.192.142 2803:f800:50::6ca2:c08e 2606:4700:50::adf5:3a8e 2a06:98c1:50::ac40:208eAS13335 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: matt.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
matt.ns.cloudflare.com 108.162.193.131NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
matt.ns.cloudflare.com 173.245.59.131NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
matt.ns.cloudflare.com 172.64.33.131NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
matt.ns.cloudflare.com 2a06:98c1:50::ac40:2183NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
matt.ns.cloudflare.com 2803:f800:50::6ca2:c183NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
matt.ns.cloudflare.com 2606:4700:58::adf5:3b83NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
roxy.ns.cloudflare.com 173.245.58.142NOERROR, 14 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, 14 ms, authoritativenoyes / yesrefused2026.10.2
roxy.ns.cloudflare.com 2803:f800:50::6ca2:c08eNOERROR, 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, 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: matt.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 2417993808 · primary matt.ns.cloudflare.com

Found

Primary (MNAME)
matt.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417993808
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
matt.ns.cloudflare.com (108.162.193.131)2417993808
matt.ns.cloudflare.com (173.245.59.131)2417993808
matt.ns.cloudflare.com (172.64.33.131)2417993808
matt.ns.cloudflare.com (2a06:98c1:50::ac40:2183)2417993808
matt.ns.cloudflare.com (2803:f800:50::6ca2:c183)2417993808
matt.ns.cloudflare.com (2606:4700:58::adf5:3b83)2417993808
roxy.ns.cloudflare.com (173.245.58.142)2417993808
roxy.ns.cloudflare.com (172.64.32.142)2417993808
roxy.ns.cloudflare.com (108.162.192.142)2417993808
roxy.ns.cloudflare.com (2803:f800:50::6ca2:c08e)2417993808
roxy.ns.cloudflare.com (2606:4700:50::adf5:3a8e)2417993808
roxy.ns.cloudflare.com (2a06:98c1:50::ac40:208e)2417993808

Checks

  • ✓ Serial 2417993808 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 matt.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 2417993808 is a Unix timestamp (2046-08-16 00:56 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
108.162.193.131:53
TypeValueTTL
SOAmatt.ns.cloudflare.com. dns.cloudflare.com. 2417993808 10000 2400 604800 18001800
NSmatt.ns.cloudflare.com.86400
NSroxy.ns.cloudflare.com.86400
A104.18.6.147300
A104.18.7.147300
AAAA2606:4700::6812:793300
AAAA2606:4700::6812:693300
MX0 flaschenpost-de.mail.protection.outlook.com.3600
TXT"1n8r4hbjgvvkhv2ln6i4bt7q9d"30
TXT"962acee25188nr49v7rp0s6ajs"30
TXT"MS=ms46789748"30
TXT"apple-domain-verification=o0Qdwc8RscuFL39Y"30
TXT"atlassian-domain-verification=9j49WDBEwTtYTqSKQTVWU8kI35RfM5T3yEdTavnRSR6mwoVPIVQ8CoF5Wnf3zhjG"30
TXT"b03gk77qbt24g2pojf5dtans22"30
TXT"e8480f2dnj4uugvi5rk4mmo74g"30
TXT"facebook-domain-verification=zn6v8iyfbrtqbzds9hp1cjpsrymd57"30
TXT"google-site-verification=TP5JmNjFUZ7L9KAksOuj-1CGbJAN_WzYzEyK7e8uQ7w"30
TXT"heritage=external-dns,external-dns/owner=prod-fp-aks-we-1,external-dns/resource=ingress/webshop/webshop-k8s-migration"30
TXT"jetbrains-domain-verification=9uic0ttuhvxhwy59vyzso4k24"30
TXT"livefpwebshop.azurewebsites.net"30
TXT"mDW4uOrihF4JK8vPLmBS7UtA3jiRt0+r5NrbeLXlq8/3Fdkl4MkpZhNqQkgNY/yn+38G/ZDrbSvyvv2xdWwkVw=="30
TXT"mgverify=e2083e02c63d472388a9ec0d2090f7a4a1be65aafcab24d0eb3d94fd25d96729"30
TXT"miro-verification=4574537efe516e744b8f8e1d59851f462ff13378"30
TXT"ms-domain-verification=8e90f015-b102-43e4-8d97-c396d1962715"30
TXT"paloaltonetworks-site-verification=72464fb4b0a80a303b9c902808ffa75eb081735ad6e8fadf9522d23637be44a5"30
TXT"v=spf1 mx a ip4:23.97.162.202 ip4:40.68.201.58 ip4:40.68.201.65 ip4:40.68.195.137 ip4:40.68.204.18 ip4:40.68.201.211 ip4:40.68.201.206 ip4:40.115.37.106 ip4:80.155.184.148/28 ip4:212.101.211.122 ip4:167.89.98.167 ip4:213.95.132.52 include:tenant.euvino.sp" "f.martrexodns.com include:spf.mailjet.com include:_spf.salesforce.com include:mail.zendesk.com include:spf.protection.outlook.com include:_spf.psm.knowbe4.com include:spf.codepiraten.com -all"30

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 1h, NS 1d.
  • ✓ 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