debeka.de

Checked 21 October 2026, 22:12 UTC · via 8.8.8.8
✗Problems found
20 passed 2 warnings 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

warn

ns-a.ktk.de, ns-b.ktk.io, ns-c.ktk.de, ns.debeka.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns-a.ktk.de, ns-b.ktk.io, ns-c.ktk.de, ns.debeka.de
NS in the zone
ns-a.ktk.de, ns-b.ktk.io, ns-c.ktk.de
NameserverAddressesNetwork (AS)Glue
ns-a.ktk.de212.7.160.5 2a02:1628:0:c000::3:5AS12360 KTK - KEVAG Telekom GmbH, DE AS12360 KTK - KEVAG Telekom GmbH, DE212.7.160.5 2a02:1628:0:c000::3:5
ns-b.ktk.io217.17.16.165 2a01:5580:154::165AS12360 KTK - KEVAG Telekom GmbH, DE AS12360 KTK - KEVAG Telekom GmbH, DE-
ns-c.ktk.de212.7.160.11 2a02:1628:0:c000::3:11AS12360 KTK - KEVAG Telekom GmbH, DE AS12360 KTK - KEVAG Telekom GmbH, DE212.7.160.11 2a02:1628:0:c000::3:11
ns.debeka.de (parent only)212.7.177.71AS12360 KTK - KEVAG Telekom GmbH, DE212.7.177.71

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-a.ktk.de, ns-b.ktk.io, ns-c.ktk.de, ns.debeka.de.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns.debeka.de. ns-a.ktk.de, ns-b.ktk.io, ns-c.ktk.de report NS ns-a.ktk.de ns-b.ktk.io ns-c.ktk.de.
    #7
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns.debeka.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.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS12360 (KTK - KEVAG Telekom GmbH, DE): 7 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .io.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns.debeka.de.
    #13

Nameservers

fail

6 of 7 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-a.ktk.de 212.7.160.5NOERROR, 6 ms, authoritativenoyes / yesrefused-
ns-a.ktk.de 2a02:1628:0:c000::3:5NOERROR, 6 ms, authoritativenoyes / yesrefused-
ns-b.ktk.io 217.17.16.165NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-b.ktk.io 2a01:5580:154::165NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns-c.ktk.de 212.7.160.11NOERROR, 6 ms, authoritativenoyes / yesrefused-
ns-c.ktk.de 2a02:1628:0:c000::3:11NOERROR, 6 ms, authoritativenoyes / yesrefused-
ns.debeka.de 212.7.177.71no responsenono / no--

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: ns.debeka.de (212.7.177.71): read udp 46.225.38.91:36484->212.7.177.71:53: i/o timeout.
    #14
  • ✓ 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

info

serial 2026042157 · primary dns2.debeka.de

Found

Primary (MNAME)
dns2.debeka.de
Contact (RNAME)
hostmaster.debeka.de
Serial
2026042157
Refresh / retry
10800 s / 3600 s
Expire
2419200 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
ns-a.ktk.de (212.7.160.5)2026042157
ns-a.ktk.de (2a02:1628:0:c000::3:5)2026042157
ns-b.ktk.io (217.17.16.165)2026042157
ns-b.ktk.io (2a01:5580:154::165)2026042157
ns-c.ktk.de (212.7.160.11)2026042157
ns-c.ktk.de (2a02:1628:0:c000::3:11)2026042157

Checks

  • ✓ Serial 2026042157 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 28d, negative TTL 15m.
  • i
    Hidden master (not resolvable)
    The primary nameserver dns2.debeka.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 hostmaster@debeka.de #25
    The SOA RNAME hostmaster.debeka.de means hostmaster@debeka.de.
  • ✓ Date-based serial #26
    The serial 2026042157 follows the YYYYMMDDnn convention (2026-04-21).

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

18 records at the apex

Found

Read from
212.7.160.5:53
TypeValueTTL
SOAdns2.debeka.de. hostmaster.debeka.de. 2026042157 10800 3600 2419200 90028800
NSns-c.ktk.de.28800
NSns-b.ktk.io.28800
NSns-a.ktk.de.28800
A212.7.177.20028800
MX10 mx3.debeka.de.1800
MX10 mx5.debeka.de.1800
MX10 mx2.debeka.de.1800
MX10 mx6.debeka.de.1800
MX10 mx1.debeka.de.1800
MX10 mx4.debeka.de.1800
TXT"google-site-verification=ZybHO2Uys3bRsBDuwSq5RDwd_9rlhV5CPsRHiBK1Z1k"120
TXT"cisco-ci-domain-verification=34c9ce7ec109a4e0ba35050cff5d9bb865c44fb81aba04bee0d3847371d49fb5"120
TXT"MS=ms95170598"120
TXT"adobe-idp-site-verification=6f789b94cc4216f93c51e517ce914a60c6d66e0792963a473dd2838ac3433311"120
TXT"QuoVadis=74e1b516-c2e5-44c3-b041-9515746175e3"120
TXT"ks-odr=21a9b1a8-5e66-4c4f-8e15-c004efb21439"120
TXT"v=spf1 ip4:212.7.177.72 ip4:212.7.177.73 ip4:212.7.177.74 ip4:212.7.177.75 ip4:212.7.177.68 ip4:212.7.177.69 ip4:88.198.96.0 ip4:88.198.96.1 include:_spf.zimpel.de include:spf.protection.outlook.com ~all"120

Checks

  • ✓ TTLs within range #32
    TTLs: A 8h, MX 30m, NS 8h. The NS TTL at the parent is 1d and in the zone 8h; 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