bkz.de

Checked 21 October 2026, 21:48 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

ns.stroh-druck.de, pns.dtag.de, secondary004.dtag.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.stroh-druck.de, pns.dtag.de, secondary004.dtag.net
NS in the zone
ns.stroh-druck.de, pns.dtag.de, secondary004.dtag.net
NameserverAddressesNetwork (AS)Glue
ns.stroh-druck.de217.89.140.135AS3320 DTAG - Deutsche Telekom AG, DE217.89.140.135
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 ns.stroh-druck.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.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS3320 (DTAG - Deutsche Telekom AG, DE): 3 addresses; 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: ns.stroh-druck.de.
    #13

Nameservers

warn

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.stroh-druck.de 217.89.140.135NOERROR, 8 ms, authoritativenoyes / yesrefused9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.3
pns.dtag.de 194.25.0.125NOERROR, 9 ms, authoritativenoyes / yesrefusedDomainNameServer
pns.dtag.de 2003:40:8000::100NOERROR, 6 ms, authoritativenoyes / yesrefusedDomainNameServer
secondary004.dtag.net 195.244.245.27NOERROR, 12 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: ns.stroh-druck.de: "9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.3". 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 2026042307 · primary ns.stroh-druck.de

Found

Primary (MNAME)
ns.stroh-druck.de
Contact (RNAME)
hostmaster.stroh-druck.de
Serial
2026042307
Refresh / retry
14400 s / 3600 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns.stroh-druck.de (217.89.140.135)2026042307
pns.dtag.de (194.25.0.125)2026042307
pns.dtag.de (2003:40:8000::100)2026042307
secondary004.dtag.net (195.244.245.27)2026042307
secondary004.dtag.net (2a00:fa8:3:0:100:0:4:1)2026042307

Checks

  • ✓ Serial 2026042307 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.stroh-druck.de is one of the listed nameservers.
  • ✓ Contact hostmaster@stroh-druck.de #25
    The SOA RNAME hostmaster.stroh-druck.de means hostmaster@stroh-druck.de.
  • ✓ Date-based serial #26
    The serial 2026042307 follows the YYYYMMDDnn convention (2026-04-23).

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

12 records at the apex

Found

Read from
217.89.140.135:53
TypeValueTTL
SOAns.stroh-druck.de. hostmaster.stroh-druck.de. 2026042307 14400 3600 604800 8640086400
NSsecondary004.dtag.net.86400
NSns.stroh-druck.de.86400
NSpns.dtag.de.86400
A217.182.184.1991800
MX10 mail.stroh-druck.de.1800
MX20 mforward.dtag.de.1800
TXT"6hoauj6qvsdjmeg0ff4stmits8"1800
TXT"MS=B7FDA7F954AABB077B53D228F33F9E5386BCC155"1800
TXT"brevo-code:f2b28205a765fa7a208bfc8eefffa196"1800
TXT"v=spf1 mx include:agenturserver.de -all"1800
TXT"facebook-domain-verification=xxw2z49c5t2w18lcfdlujxsgp6bq80"1800

Checks

  • ✓ TTLs within range #32
    TTLs: A 30m, MX 30m, 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