kleve.de

Checked 21 October 2026, 23:10 UTC · via 8.8.8.8
!Passed with warnings
23 passed 2 warnings 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

dns.krzn.de, pns.dtag.de, secondary004.dtag.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns.krzn.de, pns.dtag.de, secondary004.dtag.net
NS in the zone
dns.krzn.de, pns.dtag.de, secondary004.dtag.net
NameserverAddressesNetwork (AS)Glue
dns.krzn.de194.77.253.129AS48049 KRZN-AS - Kommunales Rechenzentrum Niederrhein, DE194.77.253.129
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
secondary004.dtag.net195.244.245.27 2a00:fa8:3:0:100:0:4:1AS5605 NETUSE - NetUSE AG, DE AS5605 NETUSE - NetUSE AG, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to dns.krzn.de, pns.dtag.de, secondary004.dtag.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 3 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS3320 (DTAG - Deutsche Telekom AG, DE): 2 addresses; AS48049 (KRZN-AS - Kommunales Rechenzentrum Niederrhein, DE): 1 address; 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: dns.krzn.de.
    #13

Nameservers

warn

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns.krzn.de 194.77.253.129NOERROR, 9 ms, authoritativenoyes / yesrefused9.18.39-0ubuntu0.24.04.8-Ubuntu
pns.dtag.de 194.25.0.125NOERROR, 9 ms, authoritativenoyes / yesrefusedDomainNameServer
pns.dtag.de 2003:40:8000::100NOERROR, 7 ms, authoritativenoyes / yesrefusedDomainNameServer
secondary004.dtag.net 195.244.245.27NOERROR, 13 ms, authoritativenoyes / yesrefusedDomainNameServer
secondary004.dtag.net 2a00:fa8:3:0:100:0:4:1NOERROR, 17 ms, authoritativenoyes / yesrefusedDomainNameServer

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: dns.krzn.de: "9.18.39-0ubuntu0.24.04.8-Ubuntu". 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 2026081801 · primary dns.krzn.de

Found

Primary (MNAME)
dns.krzn.de
Contact (RNAME)
joachim.krzn.de
Serial
2026081801
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
dns.krzn.de (194.77.253.129)2026081801
pns.dtag.de (194.25.0.125)2026081801
pns.dtag.de (2003:40:8000::100)2026081801
secondary004.dtag.net (195.244.245.27)2026081801
secondary004.dtag.net (2a00:fa8:3:0:100:0:4:1)2026081801

Checks

  • ✓ Serial 2026081801 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns.krzn.de is one of the listed nameservers.
  • ✓ Contact joachim@krzn.de #25
    The SOA RNAME joachim.krzn.de means joachim@krzn.de.
  • ✓ Date-based serial #26
    The serial 2026081801 follows the YYYYMMDDnn convention (2026-08-18).

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

16 records at the apex

Found

Read from
194.77.253.129:53
TypeValueTTL
SOAdns.krzn.de. joachim.krzn.de. 2026081801 28800 7200 604800 360014400
NSpns.dtag.de.14400
NSsecondary004.dtag.net.14400
NSdns.krzn.de.14400
A194.77.238.18414400
A194.77.238.18314400
MX30 mail-in.as-scan.de.14400
MX50 mx2.as-scan.de.14400
TXT"v=spf1 a mx ptr mx:mailout02.iacd.net ip4:194.77.253.0/24 ip4:194.77.250.0/24 ip4:194.77.237.0/24 ip4:217.113.45.225 include:spf1.c-trace.de ~all"14400
TXT"google-site-verification=aanuE81QP59wKOhw7eBttBwpbv-vI77n9vaG-Ug6RA8"14400
TXT"_telesec-domain-validation=317144_2023-11-09_zVjTj6CcutfrJONffPrNaCQ8is834DUPOWWdWSekXLHdNNqmXK"14400
TXT"MS=ms52129917"14400
TXT"mm17pjhhb1v1h147l3o00qghu2"14400
TXT"apple-domain-verification=uxEJ51ApXnVLXrjQ "14400
TXT"_telesec-domain-validation=301167_2022-03-03_kcP7iMNQRhJuQwmZLySX6EPSWPGcOPWAnStaKU4gV96TPtEcho"14400
TXT"_telesec-domain-validation=332180_2025-02-12_ItJqUJQFZwoiavVHMXVvtnf8300v3I1It6tjfWcjmh8A8lNnl2 "14400

Checks

  • ✓ TTLs within range #32
    TTLs: A 4h, MX 4h, NS 4h. The NS TTL at the parent is 1d and in the zone 4h; 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