klett-sprachen.de

Checked 21 October 2026, 23:10 UTC · via 8.8.8.8
!Passed with warnings
25 passed 1 warning 0 failed 3 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

pass

ns11.zainternet.net, ns7.za-internet.net, ns8.za-domain.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns11.zainternet.net, ns7.za-internet.net, ns8.za-domain.de
NS in the zone
ns11.zainternet.net, ns7.za-internet.net, ns8.za-domain.de
NameserverAddressesNetwork (AS)Glue
ns11.zainternet.net116.203.129.135 2a01:4f8:c2c:11f3::1AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE-
ns7.za-internet.net193.7.168.51 2a0d:1700::193:7:168:51AS30791 ZA-AS - za-internet GmbH, DE AS30791 ZA-AS - za-internet GmbH, DE-
ns8.za-domain.de193.7.169.10 2a0d:1700:0:1:193:7:169:10AS30791 ZA-AS - za-internet GmbH, DE AS30791 ZA-AS - za-internet GmbH, DE193.7.169.10 2a0d:1700:0:1:193:7:169:10

Checks

  • ✓ 3 nameservers #6
    Delegated to ns11.zainternet.net, ns7.za-internet.net, ns8.za-domain.de.
  • ✓ 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.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 2 addresses; AS30791 (ZA-AS - za-internet GmbH, DE): 4 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns11.zainternet.net 116.203.129.135NOERROR, 1 ms, authoritativenoyes / yesrefused-
ns11.zainternet.net 2a01:4f8:c2c:11f3::1NOERROR, 1 ms, authoritativenoyes / yesrefused-
ns7.za-internet.net 193.7.168.51NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns7.za-internet.net 2a0d:1700::193:7:168:51NOERROR, 14 ms, authoritativenoyes / yesrefused-
ns8.za-domain.de 193.7.169.10NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns8.za-domain.de 2a0d:1700:0:1:193:7:169:10NOERROR, 14 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 6 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 2026102102 · primary ns7.za-internet.net

Found

Primary (MNAME)
ns7.za-internet.net
Contact (RNAME)
dnsmaster.za-internet.net
Serial
2026102102
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns11.zainternet.net (116.203.129.135)2026102102
ns11.zainternet.net (2a01:4f8:c2c:11f3::1)2026102102
ns7.za-internet.net (193.7.168.51)2026102102
ns7.za-internet.net (2a0d:1700::193:7:168:51)2026102102
ns8.za-domain.de (193.7.169.10)2026102102
ns8.za-domain.de (2a0d:1700:0:1:193:7:169:10)2026102102

Checks

  • ✓ Serial 2026102102 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns7.za-internet.net is one of the listed nameservers.
  • ✓ Contact dnsmaster@za-internet.net #25
    The SOA RNAME dnsmaster.za-internet.net means dnsmaster@za-internet.net.
  • ✓ Date-based serial #26
    The serial 2026102102 follows the YYYYMMDDnn convention (2026-10-21).

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
116.203.129.135:53
TypeValueTTL
SOAns7.za-internet.net. dnsmaster.za-internet.net. 2026102102 28800 7200 604800 600600
NSns7.za-internet.net.86400
NSns8.za-domain.de.86400
NSns11.zainternet.net.86400
A206.81.31.186600
MX10 mx01.hornetsecurity.com.300
MX40 mx04.hornetsecurity.com.300
MX30 mx03.hornetsecurity.com.300
MX20 mx02.hornetsecurity.com.300
TXT"hh3gbmue1en0tepv0fbi56dh51"3600
TXT"adobe-idp-site-verification=e8e939fb-cc74-49a7-b950-dc069d1545e4"3600
TXT"v=spf1 a ip4:83.138.82.107 a:etermin.net a:kunaki.han-solo.net include:_spf.klett-sprachen.de include:_spf.wirth-horn.de include:inxserver.com include:spf.de.umantis.com include:spf.hornetsecurity.com include:mail.zendesk.com -all"3600
TXT"MS=ms90771733"3600
TXT"apple-domain-verification=sIbttljr4HGFoWKG"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 5m, NS 1d.
  • ✓ 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