vaillant.de

Checked 22 October 2026, 00:50 UTC · via 8.8.8.8
!Passed with warnings
24 passed 1 warning 0 failed 4 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

a.prim-ns.de, a.sec-ns.net, c.sec-ns.de, m.sec-ns.de, n.sec-ns.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
a.prim-ns.de, a.sec-ns.net, c.sec-ns.de, m.sec-ns.de, n.sec-ns.net
NS in the zone
a.prim-ns.de, a.sec-ns.net, c.sec-ns.de, m.sec-ns.de, n.sec-ns.net
NameserverAddressesNetwork (AS)Glue
a.prim-ns.de194.163.252.5 2a00:74c0:10:203::53:1AS61157 PLUSSERVER-ASN1 - PlusServer GmbH, DE AS61157 PLUSSERVER-ASN1 - PlusServer GmbH, DE194.163.252.5 2a00:74c0:10:203::53:1
a.sec-ns.net195.180.210.17AS61157 PLUSSERVER-ASN1 - PlusServer GmbH, DE-
c.sec-ns.de195.180.210.33 2a00:74c0:10:201::53:1AS61157 PLUSSERVER-ASN1 - PlusServer GmbH, DE AS61157 PLUSSERVER-ASN1 - PlusServer GmbH, DE195.180.210.33 2a00:74c0:10:201::53:1
m.sec-ns.de85.214.111.115AS6724 STRATO - Strato GmbH, DE-
n.sec-ns.net54.37.228.71 2001:41d0:302:2200::45a6AS16276 OVH - OVH SAS, FR AS16276 OVH - OVH SAS, FR-

Checks

  • ✓ 5 nameservers #6
    Delegated to a.prim-ns.de, a.sec-ns.net, c.sec-ns.de, m.sec-ns.de, n.sec-ns.net.
  • ✓ 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 4 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS16276 (OVH - OVH SAS, FR): 2 addresses; AS61157 (PLUSSERVER-ASN1 - PlusServer GmbH, DE): 5 addresses; AS6724 (STRATO - Strato GmbH, DE): 1 address.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: a.sec-ns.net, m.sec-ns.de.
    #13

Nameservers

info

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a.prim-ns.de 194.163.252.5NOERROR, 13 ms, authoritativenoyes / yesrefusedToaster connected to coffee cup
a.prim-ns.de 2a00:74c0:10:203::53:1NOERROR, 13 ms, authoritativenoyes / yesrefusedToaster connected to coffee cup
a.sec-ns.net 195.180.210.17NOERROR, 14 ms, authoritativenoyes / yesrefusedToaster connected to coffee cup
c.sec-ns.de 195.180.210.33NOERROR, 13 ms, authoritativenoyes / yesrefusedToaster connected to coffee cup
c.sec-ns.de 2a00:74c0:10:201::53:1NOERROR, 13 ms, authoritativenoyes / yesrefusedToaster connected to coffee cup
m.sec-ns.de 85.214.111.115NOERROR, 13 ms, authoritativenoyes / yesrefusedToaster connected to coffee cup
n.sec-ns.net 54.37.228.71NOERROR, 16 ms, authoritativenoyes / yesrefusedToaster connected to coffee cup
n.sec-ns.net 2001:41d0:302:2200::45a6NOERROR, 16 ms, authoritativenoyes / yesrefusedToaster connected to coffee cup

Checks

  • ✓ All respond #14
    All 8 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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: a.prim-ns.de: "Toaster connected to coffee cup"; a.sec-ns.net: "Toaster connected to coffee cup"; c.sec-ns.de: "Toaster connected to coffee cup"; m.sec-ns.de: "Toaster connected to coffee cup"; n.sec-ns.net: "Toaster connected to coffee cup".
    #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 2026102002 · primary a.prim-ns.de

Found

Primary (MNAME)
a.prim-ns.de
Contact (RNAME)
hostmaster.nexinto.net
Serial
2026102002
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
1200 s

Serial per nameserver

NameserverSerial
a.prim-ns.de (194.163.252.5)2026102002
a.prim-ns.de (2a00:74c0:10:203::53:1)2026102002
a.sec-ns.net (195.180.210.17)2026102002
c.sec-ns.de (195.180.210.33)2026102002
c.sec-ns.de (2a00:74c0:10:201::53:1)2026102002
m.sec-ns.de (85.214.111.115)2026102002
n.sec-ns.net (54.37.228.71)2026102002
n.sec-ns.net (2001:41d0:302:2200::45a6)2026102002

Checks

  • ✓ Serial 2026102002 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 20m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver a.prim-ns.de is one of the listed nameservers.
  • ✓ Contact hostmaster@nexinto.net #25
    The SOA RNAME hostmaster.nexinto.net means hostmaster@nexinto.net.
  • ✓ Date-based serial #26
    The serial 2026102002 follows the YYYYMMDDnn convention (2026-10-20).

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

pass

24 records at the apex

Found

Read from
194.163.252.5:53
TypeValueTTL
SOAa.prim-ns.de. hostmaster.nexinto.net. 2026102002 28800 7200 604800 120043200
NSm.sec-ns.de.43200
NSa.sec-ns.net.43200
NSc.sec-ns.de.43200
NSn.sec-ns.net.43200
NSa.prim-ns.de.43200
A52.178.106.20643200
MX10 vaillant-de.mail.protection.outlook.com.43200
TXT"eaMGq6NOkX5ryf/esZTPkguNMOrwIJKR+S9vA2ZiNmLHaH35zRh7P/O3xiuKW5Zp+VZq89hq3jchzohcw9+Dtw=="43200
TXT"MS=ms95393925"43200
TXT"brevo-code:2a5849fea4ba4b792e953f69400cd80c"43200
TXT"v=spf1 mx ip4:57.66.132.25 ip4:57.66.132.26 ip4:57.66.132.12 ip4:57.66.211.122 ip4:57.66.211.126 ip4:57.66.211.130 ip4:57.66.211.134 include:spf.protection.outlook.com include:spf.brevo.com include:_spf.salesforce.com -all"43200
TXT"_h7jqiin6cyyrxb5wn74h3qqfic2iiwb"43200
TXT"brevo-code:3f2565fff1b35fc7a4871b4fb62b0fec"43200
TXT"_8jcmbcnwdwe6x86x7nmdlmn2wzqplln"43200
TXT"brevo-code:cb7fc40d2b67d775fc185b4c93b14e06"43200
TXT"brevo-code:ef5ae76c8d7839ed9631ac008d05040b"43200
TXT"_globalsign-domain-verification=2YK4lTZVtWeOxv8bKtznkyTzWF8k6gO2BXxJny-o_F"43200
TXT"asv_domain=7787ae9242442986d46d47a2ae9c8cbb"43200
TXT"v9mhq1bdqh0fcmshpj081l71p8v5qwbx"43200
TXT"AMZaTZp0IXguErGGY/54YXTYDKIxTWIMhAY5bfh0Wfc="43200
CAA0 issue "globalsign.com"300
CAA0 issue "letsencrypt.org"300
CAA0 issue "digicert.com"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 12h, MX 12h, NS 12h. The NS TTL at the parent is 1d and in the zone 12h; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: globalsign.com, letsencrypt.org, digicert.com.