vgh.de

Checked 22 October 2026, 00:51 UTC · via 8.8.8.8
!Passed with warnings
22 passed 1 warning 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

ns.htp-tel.de, ns.ivv.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.htp-tel.de, ns.ivv.de
NS in the zone
ns.htp-tel.de, ns.ivv.de
NameserverAddressesNetwork (AS)Glue
ns.htp-tel.de81.14.244.10 2a02:560:2:140::10AS13045 HTP-AS - htp GmbH, DE AS13045 HTP-AS - htp GmbH, DE81.14.244.10 2a02:560:2:140::10
ns.ivv.de193.111.217.229AS24939 IVV - IVV, DE193.111.217.229

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns.htp-tel.de, ns.ivv.de.
    #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 2 IPv4 /24s and 1 IPv6 /48.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS13045 (HTP-AS - htp GmbH, DE): 2 addresses; AS24939 (IVV - IVV, DE): 1 address.
  • i
    All nameserver names under .de
    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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns.ivv.de.
    #13

Nameservers

pass

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.htp-tel.de 81.14.244.10NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns.htp-tel.de 2a02:560:2:140::10NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns.ivv.de 193.111.217.229NOERROR, 24 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 3 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 2024102487 · primary ns.ivv.de

Found

Primary (MNAME)
ns.ivv.de
Contact (RNAME)
domainmaster.ivv.de
Serial
2024102487
Refresh / retry
86400 s / 14400 s
Expire
1209600 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns.htp-tel.de (81.14.244.10)2024102487
ns.htp-tel.de (2a02:560:2:140::10)2024102487
ns.ivv.de (193.111.217.229)2024102487

Checks

  • ✓ Serial 2024102487 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 4h, expire 14d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.ivv.de is one of the listed nameservers.
  • ✓ Contact domainmaster@ivv.de #25
    The SOA RNAME domainmaster.ivv.de means domainmaster@ivv.de.
  • ✓ Date-based serial #26
    The serial 2024102487 follows the YYYYMMDDnn convention (2024-10-24).

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

14 records at the apex

Found

Read from
81.14.244.10:53
TypeValueTTL
SOAns.ivv.de. domainmaster.ivv.de. 2024102487 86400 14400 1209600 36003600
NSns.htp-tel.de.3600
NSns.ivv.de.3600
A3.64.78.1503600
A52.58.237.663600
MX10 mx.ivv.de.3600
TXT"cisco-ci-domain-verification=5843f7410e6287530903cbd319a6549b8215d73bd1be3022e954ae8b294badd1"3600
TXT"google-site-verification=qzrk5_H3V6O8bCtV5sq6v3jn8_O6jNkchty4gyKnZaw"3600
TXT"MS=ms40353651"3600
TXT"swisssign-check=W0O2vISIyyooIBmOtFx1aAcj1jk"3600
TXT"QuoVadis=751890da-0d57-4f38-991b-28c42c2548be"3600
TXT"facebook-domain-verification=qq96888ao7iexqyapqpm6thhamzcy4"3600
TXT"v=spf1 ip4:81.14.148.0/24 ip4:193.111.216.0/22 mx include:oev.de ?all"3600
TXT"adobe-idp-site-verification=85301b59fa807c2a11a420742d6eb06172266112b755f5ffae063b94d94f2d2b"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 1h. The NS TTL at the parent is 1d and in the zone 1h; 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.
  • 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