zahnaerzte-wl.de

Checked 22 October 2026, 01:10 UTC · via 8.8.8.8
!Passed with warnings
19 passed 4 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

warn

ns3.zahnaerzte-wl.de, ns4.zahnaerzte-wl.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns3.zahnaerzte-wl.de, ns4.zahnaerzte-wl.de
NS in the zone
ns3.zahnaerzte-wl.de, ns4.zahnaerzte-wl.de
NameserverAddressesNetwork (AS)Glue
ns3.zahnaerzte-wl.de212.3.65.147AS24637 WEBDISCOUNT - WEBDISCOUNT GmbH & Co. KG, DE212.3.65.147
ns4.zahnaerzte-wl.de212.3.65.132AS24637 WEBDISCOUNT - WEBDISCOUNT GmbH & Co. KG, DE212.3.65.132

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns3.zahnaerzte-wl.de, ns4.zahnaerzte-wl.de.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns3.zahnaerzte-wl.de, ns4.zahnaerzte-wl.de.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • !
    Nameservers in one network
    all IPv4 addresses are in 212.3.65.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS24637 (WEBDISCOUNT - WEBDISCOUNT GmbH & Co. KG, DE): 2 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 .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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

pass

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns3.zahnaerzte-wl.de 212.3.65.147NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns4.zahnaerzte-wl.de 212.3.65.132NOERROR, 11 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 2 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

warn

serial 389 · primary ns3.zahnaerzte-wl.de

Found

Primary (MNAME)
ns3.zahnaerzte-wl.de
Contact (RNAME)
postmaster.zahnaerzte-wl.de
Serial
389
Refresh / retry
60000 s / 20000 s
Expire
60000 s
Negative TTL
6500 s

Serial per nameserver

NameserverSerial
ns3.zahnaerzte-wl.de (212.3.65.147)389
ns4.zahnaerzte-wl.de (212.3.65.132)389

Checks

  • ✓ Serial 389 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    expire 1000m is shorter than 7d; secondaries stop answering too soon when the primary is down; expire 1000m must be longer than refresh + retry. Current values: refresh 1000m, retry 5h33m20s, expire 1000m, negative TTL 1h48m20s.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns3.zahnaerzte-wl.de is one of the listed nameservers.
  • ✓ Contact postmaster@zahnaerzte-wl.de #25
    The SOA RNAME postmaster.zahnaerzte-wl.de means postmaster@zahnaerzte-wl.de.
  • ✓ Counter serial #26
    The serial 389 is a plain counter.

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

12 records at the apex

Found

Read from
212.3.65.147:53
TypeValueTTL
SOAns3.zahnaerzte-wl.de. postmaster.zahnaerzte-wl.de. 389 60000 20000 60000 6500302400
NSns3.zahnaerzte-wl.de.300
NSns4.zahnaerzte-wl.de.300
A195.16.94.1306500
MX120 sps3.zahnaerzte-wl.de.6500
MX10 sps.zahnaerzte-wl.de.6500
MX20 sps2.zahnaerzte-wl.de.6500
MX120 sps1.zahnaerzte-wl.de.6500
TXT"v=spf1 ip4:212.3.65.128/27 include:spf.crsend.com -all"6500
TXT"google-site-verification=4eLNODX7lXiwWt2ceN1g_ldcdh-2HJvxx2TbznPk6pY" ""6500
TXT"apple-domain-verification=mkIQBYgObuoU9IjQ"6500
TXT"MS=ED33D8CA2BCF2B05FA578C1E677949B80DF55D20"6500

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h48m20s, MX 1h48m20s, NS 5m. The NS TTL at the parent is 1d and in the zone 5m; 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