dke.de

Checked 21 October 2026, 22:14 UTC · via 8.8.8.8
✗Problems found
24 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

ns.vde.com, ns25.cinetic21.de, ns26.cinetic21.de, ns27.cinetic21.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.vde.com, ns25.cinetic21.de, ns26.cinetic21.de, ns27.cinetic21.de
NS in the zone
ns.vde.com, ns25.cinetic21.de, ns26.cinetic21.de, ns27.cinetic21.de
NameserverAddressesNetwork (AS)Glue
ns.vde.com194.25.92.189AS3320 DTAG - Deutsche Telekom AG, DE-
ns25.cinetic21.de185.132.35.227 2607:f1c0:fe:53:185:132:35:227AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
ns26.cinetic21.de217.160.80.227 2001:8d8:fe:53:217:160:80:227AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
ns27.cinetic21.de217.160.81.227 2001:8d8:fe:53:217:160:81:227AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns.vde.com, ns25.cinetic21.de, ns26.cinetic21.de, ns27.cinetic21.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 4 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 2 addresses; AS3320 (DTAG - Deutsche Telekom AG, DE): 1 address; AS8560 (IONOS-AS - IONOS SE, DE): 4 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .de.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns.vde.com.
    #13

Nameservers

fail

7 of 7 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.vde.com 194.25.92.189NOERROR, 5 ms, authoritativenono / yesrefused-
ns25.cinetic21.de 185.132.35.227NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns25.cinetic21.de 2607:f1c0:fe:53:185:132:35:227NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns26.cinetic21.de 217.160.80.227NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns26.cinetic21.de 2001:8d8:fe:53:217:160:80:227NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns27.cinetic21.de 217.160.81.227NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns27.cinetic21.de 2001:8d8:fe:53:217:160:81:227NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/

Checks

  • ✓ All respond #14
    All 7 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: ns25.cinetic21.de: "Served by PowerDNS - https://www.powerdns.com/"; ns26.cinetic21.de: "Served by PowerDNS - https://www.powerdns.com/"; ns27.cinetic21.de: "Served by PowerDNS - https://www.powerdns.com/".
    #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: ns.vde.com (194.25.92.189): dial tcp 194.25.92.189:53: i/o timeout.
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2026081901 · primary ns.vde.com

Found

Primary (MNAME)
ns.vde.com
Contact (RNAME)
mpulice.vde.com
Serial
2026081901
Refresh / retry
3600 s / 1800 s
Expire
1209600 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns.vde.com (194.25.92.189)2026081901
ns25.cinetic21.de (185.132.35.227)2026081901
ns25.cinetic21.de (2607:f1c0:fe:53:185:132:35:227)2026081901
ns26.cinetic21.de (217.160.80.227)2026081901
ns26.cinetic21.de (2001:8d8:fe:53:217:160:80:227)2026081901
ns27.cinetic21.de (217.160.81.227)2026081901
ns27.cinetic21.de (2001:8d8:fe:53:217:160:81:227)2026081901

Checks

  • ✓ Serial 2026081901 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 30m, expire 14d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.vde.com is one of the listed nameservers.
  • ✓ Contact mpulice@vde.com #25
    The SOA RNAME mpulice.vde.com means mpulice@vde.com.
  • ✓ Date-based serial #26
    The serial 2026081901 follows the YYYYMMDDnn convention (2026-08-19).

DNSSEC

warn

Signed, but no DS at parent

Found

Validated by resolver
no
Denial of existence
NSEC
Signatures valid until
29 October 2026

DNSKEY in the zone

Key tagRoleAlgorithm
57726KSK (257)ECDSAP256SHA256 (13)

Checks

  • !
    Signed but not delegated securely
    The zone is signed but the parent has no DS record, so the signatures are not used. Publish the DS record at your registrar.
    #27
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Signatures valid until 2026-10-29 #30
    The earliest DNSKEY/SOA signature expires at 2026-10-29 00:00 UTC.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

info

10 records at the apex

Found

Read from
194.25.92.189:53
TypeValueTTL
SOAns.vde.com. mpulice.vde.com. 2026081901 3600 1800 1209600 36003600
NSns27.cinetic21.de.3600
NSns.vde.com.3600
NSns25.cinetic21.de.3600
NSns26.cinetic21.de.3600
A91.105.243.11338400
MX5 dke-de.mail.protection.outlook.com.38400
MX50 smtp.dke.de.38400
TXT"MS=ms34585939"300
TXT"google-site-verification=dGIClEl4b8IRIczrJ_f2ejgxmjz33qCu8XHims5KpSo"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 640m, MX 640m, 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