siegen.de

Checked 22 October 2026, 00:10 UTC · via 8.8.8.8
✗Problems found
22 passed 2 warnings 1 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

dns.globvill.de, dns.globvill.ruhr, dns.voerde.globvill.de, ns.suedwestfalenit.de, ns.suedwestfalenit.nrw

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns.globvill.de, dns.globvill.ruhr, dns.voerde.globvill.de, ns.suedwestfalenit.de, ns.suedwestfalenit.nrw
NS in the zone
dns.globvill.de, dns.globvill.ruhr, dns.voerde.globvill.de, ns.suedwestfalenit.de, ns.suedwestfalenit.nrw
NameserverAddressesNetwork (AS)Glue
dns.globvill.de212.20.191.2 2001:40b8::22AS13039 GLOBAL-VILLAGE - Global Village GmbH, DE AS13039 GLOBAL-VILLAGE - Global Village GmbH, DE-
dns.globvill.ruhr212.20.161.2 2001:40b8::23AS13039 GLOBAL-VILLAGE - Global Village GmbH, DE AS13039 GLOBAL-VILLAGE - Global Village GmbH, DE-
dns.voerde.globvill.de212.20.160.2 2001:40b8::21AS13039 GLOBAL-VILLAGE - Global Village GmbH, DE AS13039 GLOBAL-VILLAGE - Global Village GmbH, DE-
ns.suedwestfalenit.de185.41.57.11 2a02:100e:bef8:2:0:57:11:1AS201318 SuedwestfalenIT-AS - Suedwestfalen-IT, DE AS201318 SuedwestfalenIT-AS - Suedwestfalen-IT, DE185.41.57.11 2a02:100e:bef8:2:0:57:11:1
ns.suedwestfalenit.nrw185.41.57.12 2a02:100e:bef8:2:0:57:12:1AS201318 SuedwestfalenIT-AS - Suedwestfalen-IT, DE AS201318 SuedwestfalenIT-AS - Suedwestfalen-IT, DE-

Checks

  • ✓ 5 nameservers #6
    Delegated to dns.globvill.de, dns.globvill.ruhr, dns.voerde.globvill.de, ns.suedwestfalenit.de, ns.suedwestfalenit.nrw.
  • ✓ 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.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS13039 (GLOBAL-VILLAGE - Global Village GmbH, DE): 6 addresses; AS201318 (SuedwestfalenIT-AS - Suedwestfalen-IT, DE): 4 addresses.
  • ✓ Nameserver names under 3 TLDs #12
    Nameserver names use the TLDs .de, .nrw, .ruhr.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

fail

8 of 10 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns.globvill.de 212.20.191.2NOERROR, 7 ms, authoritativenoyes / yesrefuseddns
dns.globvill.de 2001:40b8::22NOERROR, 7 ms, authoritativenoyes / yesrefuseddns
dns.globvill.ruhr 212.20.161.2NOERROR, 6 ms, authoritativenoyes / yesrefuseddns
dns.globvill.ruhr 2001:40b8::23NOERROR, 7 ms, authoritativenoyes / yesrefuseddns
dns.voerde.globvill.de 212.20.160.2NOERROR, 9 ms, authoritativenoyes / yesrefuseddns
dns.voerde.globvill.de 2001:40b8::21NOERROR, 9 ms, authoritativenoyes / yesrefuseddns
ns.suedwestfalenit.de 185.41.57.11NOERROR, 12 ms, authoritativenoyes / yesrefused[Secured]
ns.suedwestfalenit.de 2a02:100e:bef8:2:0:57:11:1no responsenono / no--
ns.suedwestfalenit.nrw 185.41.57.12NOERROR, 12 ms, authoritativenoyes / yesrefused[Secured]
ns.suedwestfalenit.nrw 2a02:100e:bef8:2:0:57:12:1no responsenono / no--

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: ns.suedwestfalenit.de (2a02:100e:bef8:2:0:57:11:1): read udp [2a01:4f8:1c1c:eebf::1]:37358->[2a02:100e:bef8:2:0:57:11:1]:53: i/o timeout; ns.suedwestfalenit.nrw (2a02:100e:bef8:2:0:57:12:1): read udp [2a01:4f8:1c1c:eebf::1]:57051->[2a02:100e:bef8:2:0:57:12:1]: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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: dns.globvill.de: "dns"; dns.globvill.ruhr: "dns"; dns.voerde.globvill.de: "dns"; ns.suedwestfalenit.de: "[Secured]"; ns.suedwestfalenit.nrw: "[Secured]".
    #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 2026100100 · primary ns.suedwestfalenit.de

Found

Primary (MNAME)
ns.suedwestfalenit.de
Contact (RNAME)
domainverwaltung.sit.nrw
Serial
2026100100
Refresh / retry
86400 s / 7200 s
Expire
2592000 s
Negative TTL
43200 s

Serial per nameserver

NameserverSerial
dns.globvill.de (212.20.191.2)2026100100
dns.globvill.de (2001:40b8::22)2026100100
dns.globvill.ruhr (212.20.161.2)2026100100
dns.globvill.ruhr (2001:40b8::23)2026100100
dns.voerde.globvill.de (212.20.160.2)2026100100
dns.voerde.globvill.de (2001:40b8::21)2026100100
ns.suedwestfalenit.de (185.41.57.11)2026100100
ns.suedwestfalenit.nrw (185.41.57.12)2026100100

Checks

  • ✓ Serial 2026100100 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 2h, expire 30d, negative TTL 12h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.suedwestfalenit.de is one of the listed nameservers.
  • ✓ Contact domainverwaltung@sit.nrw #25
    The SOA RNAME domainverwaltung.sit.nrw means domainverwaltung@sit.nrw.
  • ✓ Date-based serial #26
    The serial 2026100100 follows the YYYYMMDDnn convention (2026-10-01).

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

15 records at the apex

Found

Read from
212.20.191.2:53
TypeValueTTL
SOAns.suedwestfalenit.de. domainverwaltung.sit.nrw. 2026100100 86400 7200 2592000 432002592000
NSns.suedwestfalenit.nrw.300
NSns.suedwestfalenit.de.300
NSdns.globvill.ruhr.300
NSdns.voerde.globvill.de.300
NSdns.globvill.de.300
A52.57.43.16660
AAAA2a05:d014:14f:aa1d:21c1:5045:1317:7f3960
MX10 mx-in.kommunale.it.60
TXT"google-site-verification=izS_s00G-xAu5K_N4bADk82iM-taIqpIGw2qOsWbxNE"300
TXT"cisco-ci-domain-verification=29bbae22c38f377bedcfbdaed0220c95d54b69e8b16239215843c3e3116db0e7"300
TXT"facebook-domain-verification=6r8zlf52iak1s4yv2202kog03g0fg4"300
TXT"apple-domain-verification=63XnR7s0091FIujh"300
TXT"63c30bfe6c3b66ba75346ec6c5a2c66a5b378103347525ce807484c96290eb99"300
TXT"v=spf1 ip4:213.165.87.96 ip4:81.169.181.147 include:kommunale.it include:mail.kdvz.nrw -all"300

Checks

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