scienceblogs.de

Checked 22 October 2026, 00:02 UTC · via 8.8.8.8
!Passed with warnings
22 passed 1 warning 0 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

dns.globvill.de, dns.globvill.ruhr, dns.voerde.globvill.de

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 in the zone
dns.globvill.de, dns.globvill.ruhr, dns.voerde.globvill.de
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-

Checks

  • ✓ 3 nameservers #6
    Delegated to dns.globvill.de, dns.globvill.ruhr, dns.voerde.globvill.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.
  • i
    One address family in one network
    all IPv6 addresses are in 2001:40b8::/48, while the other address family is spread over several networks.
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13039 (GLOBAL-VILLAGE - Global Village GmbH, DE): 6 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, .ruhr.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

6 of 6 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, 7 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

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.
  • 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".
    #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 2024120401 · primary dns.voerde.globvill.de

Found

Primary (MNAME)
dns.voerde.globvill.de
Contact (RNAME)
hostmaster.globvill.de
Serial
2024120401
Refresh / retry
28800 s / 3600 s
Expire
2419200 s
Negative TTL
21600 s

Serial per nameserver

NameserverSerial
dns.globvill.de (212.20.191.2)2024120401
dns.globvill.de (2001:40b8::22)2024120401
dns.globvill.ruhr (212.20.161.2)2024120401
dns.globvill.ruhr (2001:40b8::23)2024120401
dns.voerde.globvill.de (212.20.160.2)2024120401
dns.voerde.globvill.de (2001:40b8::21)2024120401

Checks

  • ✓ Serial 2024120401 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 1h, expire 28d, negative TTL 6h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns.voerde.globvill.de is one of the listed nameservers.
  • ✓ Contact hostmaster@globvill.de #25
    The SOA RNAME hostmaster.globvill.de means hostmaster@globvill.de.
  • ✓ Date-based serial #26
    The serial 2024120401 follows the YYYYMMDDnn convention (2024-12-04).

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

info

12 records at the apex

Found

Read from
212.20.191.2:53
TypeValueTTL
SOAdns.voerde.globvill.de. hostmaster.globvill.de. 2024120401 28800 3600 2419200 2160021600
NSdns.globvill.ruhr.21600
NSdns.voerde.globvill.de.21600
NSdns.globvill.de.21600
A88.99.114.22821600
MX300 aspmx3.googlemail.com.21600
MX200 alt2.aspmx.l.google.com.21600
MX300 aspmx2.googlemail.com.21600
MX300 aspmx5.googlemail.com.21600
MX200 alt1.aspmx.l.google.com.21600
MX300 aspmx4.googlemail.com.21600
MX100 aspmx.l.google.com.21600

Checks

  • ✓ TTLs within range #32
    TTLs: A 6h, MX 6h, NS 6h. The NS TTL at the parent is 1d and in the zone 6h; 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