kvwl.de

Checked 21 October 2026, 23:11 UTC · via 8.8.8.8
✗Problems found
21 passed 1 warning 1 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

pns.dtag.de, secondary006.dtag.net, sns.kvwl.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
pns.dtag.de, secondary006.dtag.net, sns.kvwl.de
NS in the zone
pns.dtag.de, secondary006.dtag.net, sns.kvwl.de
NameserverAddressesNetwork (AS)Glue
pns.dtag.de194.25.0.125 2003:40:8000::100AS3320 DTAG - Deutsche Telekom AG, DE AS3320 DTAG - Deutsche Telekom AG, DE194.25.0.125 2003:40:8000::100
secondary006.dtag.net195.244.245.25 2a00:fa8:3:0:100:0:6:1AS5605 NETUSE - NetUSE AG, DE AS5605 NETUSE - NetUSE AG, DE-
sns.kvwl.de194.25.155.102AS3320 DTAG - Deutsche Telekom AG, DE194.25.155.102

Checks

  • ✓ 3 nameservers #6
    Delegated to pns.dtag.de, secondary006.dtag.net, sns.kvwl.de.
  • ✓ 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: sns.kvwl.de.
  • ✓ 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 3 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS3320 (DTAG - Deutsche Telekom AG, DE): 3 addresses; AS5605 (NETUSE - NetUSE AG, DE): 2 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: sns.kvwl.de.
    #13

Nameservers

fail

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
pns.dtag.de 194.25.0.125NOERROR, 9 ms, authoritativenoyes / yesrefusedDomainNameServer
pns.dtag.de 2003:40:8000::100NOERROR, 7 ms, authoritativenoyes / yesrefusedDomainNameServer
secondary006.dtag.net 195.244.245.25NOERROR, 12 ms, authoritativenoyes / yesrefusedDomainNameServer
secondary006.dtag.net 2a00:fa8:3:0:100:0:6:1NOERROR, 17 ms, authoritativenoyes / yesrefusedDomainNameServer
sns.kvwl.de 194.25.155.102NOERROR, 11 ms, authoritativenono / yesrefused-

Checks

  • ✓ All respond #14
    All 5 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: pns.dtag.de: "DomainNameServer"; secondary006.dtag.net: "DomainNameServer".
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✗
    No DNS over TCP
    DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: sns.kvwl.de (194.25.155.102): dial tcp 194.25.155.102:53: i/o timeout.
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

info

serial 2018112012 · primary pns.kvwl.de

Found

Primary (MNAME)
pns.kvwl.de
Contact (RNAME)
dnsmaster.kvwl.de
Serial
2018112012
Refresh / retry
21600 s / 3600 s
Expire
1814400 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
pns.dtag.de (194.25.0.125)2018112012
pns.dtag.de (2003:40:8000::100)2018112012
secondary006.dtag.net (195.244.245.25)2018112012
secondary006.dtag.net (2a00:fa8:3:0:100:0:6:1)2018112012
sns.kvwl.de (194.25.155.102)2018112012

Checks

  • ✓ Serial 2018112012 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 6h, retry 1h, expire 21d, negative TTL 1h.
  • i
    Hidden master
    The primary nameserver pns.kvwl.de is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact dnsmaster@kvwl.de #25
    The SOA RNAME dnsmaster.kvwl.de means dnsmaster@kvwl.de.
  • ✓ Date-based serial #26
    The serial 2018112012 follows the YYYYMMDDnn convention (2018-11-20).

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

info

11 records at the apex

Found

Read from
194.25.0.125:53
TypeValueTTL
SOApns.kvwl.de. dnsmaster.kvwl.de. 2018112012 21600 3600 1814400 3600864000
NSsns.kvwl.de.3600
NSpns.dtag.de.3600
NSsecondary006.dtag.net.3600
A136.243.160.93600
MX10 mx3.kvwl.de.3600
MX10 mx1.kvwl.de.3600
MX10 mx2.kvwl.de.3600
TXT"v=spf1 mx include:queo._spf.kvwl.de include:guidecom._spf.kvwl.de ?include:spf.crsend.com include:spf.de.umantis.com -all"3600
TXT"apple-domain-verification=DTeSCBEYkZjZrs6c"3600
TXT"jetbrains-domain-verification=91omx3zmfxxsel7zbn9w4u1fa"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