ksc.de

Checked 21 October 2026, 23:10 UTC · via 8.8.8.8
!Passed with warnings
22 passed 3 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

pass

ns1.first-ns.de, robotns2.second-ns.de, robotns3.second-ns.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.first-ns.de, robotns2.second-ns.de, robotns3.second-ns.com
NS in the zone
ns1.first-ns.de, robotns2.second-ns.de, robotns3.second-ns.com
NameserverAddressesNetwork (AS)Glue
ns1.first-ns.de213.239.242.238 2a01:4f8:0:a101::a:1AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE-
robotns2.second-ns.de213.133.100.103 2a01:4f8:0:1::5ddc:2AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE-
robotns3.second-ns.com193.47.99.3 2001:67c:192c::add:a3AS12337 NORIS-NETWORK - noris network AG, DE AS12337 NORIS-NETWORK - noris network AG, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.first-ns.de, robotns2.second-ns.de, robotns3.second-ns.com.
  • ✓ 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: AS12337 (NORIS-NETWORK - noris network AG, DE): 2 addresses; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 4 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .de.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.first-ns.de 213.239.242.238NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns1.first-ns.de 2a01:4f8:0:a101::a:1NOERROR, 4 ms, authoritativenoyes / yesrefused-
robotns2.second-ns.de 213.133.100.103NOERROR, 1 ms, authoritativenoyes / yesrefused-
robotns2.second-ns.de 2a01:4f8:0:1::5ddc:2NOERROR, 1 ms, authoritativenoyes / yesrefused-
robotns3.second-ns.com 193.47.99.3NOERROR, 6 ms, authoritativenoyes / yesrefused-
robotns3.second-ns.com 2001:67c:192c::add:a3NOERROR, 6 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

warn

serial 2026090400 · primary ns1.first-ns.de.ksc.de

Found

Primary (MNAME)
ns1.first-ns.de.ksc.de
Contact (RNAME)
postmaster.robot.first-ns.de.ksc.de
Serial
2026090400
Refresh / retry
360 s / 180 s
Expire
360 s
Negative TTL
360 s

Serial per nameserver

NameserverSerial
ns1.first-ns.de (213.239.242.238)2026090400
ns1.first-ns.de (2a01:4f8:0:a101::a:1)2026090400
robotns2.second-ns.de (213.133.100.103)2026090400
robotns2.second-ns.de (2a01:4f8:0:1::5ddc:2)2026090400
robotns3.second-ns.com (193.47.99.3)2026090400
robotns3.second-ns.com (2001:67c:192c::add:a3)2026090400

Checks

  • ✓ Serial 2026090400 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 6m is outside 20m–1d; expire 6m is shorter than 7d; secondaries stop answering too soon when the primary is down; expire 6m must be longer than refresh + retry. Current values: refresh 6m, retry 3m, expire 6m, negative TTL 6m.
    #23
  • i
    Hidden master (not resolvable)
    The primary nameserver ns1.first-ns.de.ksc.de is not listed as a nameserver and does not resolve publicly: a hidden master, or a placeholder name. Some tools (e.g. dynamic updates) use MNAME to find the primary.
    #24
  • ✓ Contact postmaster@robot.first-ns.de.ksc.de #25
    The SOA RNAME postmaster.robot.first-ns.de.ksc.de means postmaster@robot.first-ns.de.ksc.de.
  • ✓ Date-based serial #26
    The serial 2026090400 follows the YYYYMMDDnn convention (2026-09-04).

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

warn

17 records at the apex

Found

Read from
213.239.242.238:53
TypeValueTTL
SOAns1.first-ns.de.ksc.de. postmaster.robot.first-ns.de.ksc.de. 2026090400 360 180 360 360360
NSrobotns2.second-ns.de.360
NSrobotns3.second-ns.com.360
NSns1.first-ns.de.360
A46.232.224.7760
MX10 ksc-de.mail.protection.outlook.com.360
TXT"YlsOG98_4KkukLK4qbrrAJQOm6k5ka-tuMc41FK8Huk"60
TXT"apple-domain-verification=jUF9EV4KAkCxz1aJ"60
TXT"google-site-verification=7J7aVjlqiBFEpeyF7pYeGKr-xY14l6dgfYuj8DZ-feo"60
TXT"google-site-verification=QT_qAjvBTcKK060RYAbIhQnE_XfDaG_RH6yim6p8ywA"60
TXT"linkedin-site-verification=fcb8f8af-35e1-4714-9830-f5eb9ee8d9b2"60
TXT"lstsq92s62kcx091yqgbyd6rgf4wmwzx"60
TXT"v=spf1 ip4:85.115.19.150 ip4:85.115.21.26 ip4:185.71.125.0/23 include:spf.mandrillapp.com include:_spf.senders.scnem.com include:spf.cloudmail.ondemand.com include:spf.protection.outlook.com include:_spf.evolver.de include:amazonses.com include:spf.mailje" "t.com include:_spf.kundenserver.de include:_spf.perfora.net a:mo4-p05-ob.smtp.rzone.de include:143970576.spf02.hubspotemail.net -all"60
TXT"43x6bnjyzwmnwmf2mf7ng8hm0g4vf9t7"60
TXT"6e88308a21121b99d90fb0de87e39c2b4e95ba620747d13df1d2fa24c6ce0e06"60
TXT"MS=ms15117229"60
TXT"TZUhz8x6MPLlOrXWbDMGSyEcJZt8IqU0BBp3RfNShUk"60

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 6m; resolvers may use either.
    #32
  • ✓ 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