hbk-bs.de

Checked 21 October 2026, 22:42 UTC · via 8.8.8.8
!Passed with warnings
21 passed 2 warnings 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

warn

deneb.dfn.de, dns-1.serv.uni-osnabrueck.de, dns1.sonia.de, dns2.sonia.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
deneb.dfn.de, dns-1.serv.uni-osnabrueck.de, dns1.sonia.de, dns2.sonia.de
NS in the zone
deneb.dfn.de, dns-1.serv.uni-osnabrueck.de, dns1.sonia.de, dns2.sonia.de
NameserverAddressesNetwork (AS)Glue
deneb.dfn.de192.76.176.9 2001:638:800:1::9AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE-
dns-1.serv.uni-osnabrueck.de131.173.245.1 2001:638:508:f50::83ad:f501AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE131.173.245.1 2001:638:508:f50::83ad:f501
dns1.sonia.de141.41.1.250 2001:638:60a:a001::250AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE141.41.1.250
dns2.sonia.de141.41.1.150 2001:638:60a:a001::150AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE141.41.1.150

Checks

  • ✓ 4 nameservers #6
    Delegated to deneb.dfn.de, dns-1.serv.uni-osnabrueck.de, dns1.sonia.de, dns2.sonia.de.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: dns1.sonia.de (glue 141.41.1.250, zone 141.41.1.250, 2001:638:60a:a001::250); dns2.sonia.de (glue 141.41.1.150, zone 141.41.1.150, 2001:638:60a:a001::150). Update the glue at your registrar.
    #8
  • ✓ 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 3 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS680 (DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE): 8 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • i
    All nameserver names under .de
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
deneb.dfn.de 192.76.176.9NOERROR, 14 ms, authoritativenoyes / yesrefused0
deneb.dfn.de 2001:638:800:1::9NOERROR, 14 ms, authoritativenoyes / yesrefused0
dns-1.serv.uni-osnabrueck.de 131.173.245.1NOERROR, 16 ms, authoritativenoyes / yesrefused-
dns-1.serv.uni-osnabrueck.de 2001:638:508:f50::83ad:f501NOERROR, 16 ms, authoritativenoyes / yesrefused-
dns1.sonia.de 141.41.1.250NOERROR, 15 ms, authoritativenoyes / yesrefusednone
dns1.sonia.de 2001:638:60a:a001::250NOERROR, 10 ms, authoritativenoyes / yesrefusednone
dns2.sonia.de 141.41.1.150NOERROR, 11 ms, authoritativenoyes / yesrefusednone
dns2.sonia.de 2001:638:60a:a001::150NOERROR, 15 ms, authoritativenoyes / yesrefusednone

Checks

  • ✓ All respond #14
    All 8 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: deneb.dfn.de: "0"; dns1.sonia.de: "none"; dns2.sonia.de: "none".
    #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 2026101201 · primary dns1.sonia.de

Found

Primary (MNAME)
dns1.sonia.de
Contact (RNAME)
hostmaster.sonia.de
Serial
2026101201
Refresh / retry
21600 s / 2700 s
Expire
3600000 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
deneb.dfn.de (192.76.176.9)2026101201
deneb.dfn.de (2001:638:800:1::9)2026101201
dns-1.serv.uni-osnabrueck.de (131.173.245.1)2026101201
dns-1.serv.uni-osnabrueck.de (2001:638:508:f50::83ad:f501)2026101201
dns1.sonia.de (141.41.1.250)2026101201
dns1.sonia.de (2001:638:60a:a001::250)2026101201
dns2.sonia.de (141.41.1.150)2026101201
dns2.sonia.de (2001:638:60a:a001::150)2026101201

Checks

  • ✓ Serial 2026101201 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 6h, retry 45m, expire 1000h, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.sonia.de is one of the listed nameservers.
  • ✓ Contact hostmaster@sonia.de #25
    The SOA RNAME hostmaster.sonia.de means hostmaster@sonia.de.
  • ✓ Date-based serial #26
    The serial 2026101201 follows the YYYYMMDDnn convention (2026-10-12).

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

15 records at the apex

Found

Read from
192.76.176.9:53
TypeValueTTL
SOAdns1.sonia.de. hostmaster.sonia.de. 2026101201 21600 2700 3600000 8640086400
NSdns2.sonia.de.86400
NSdns-1.serv.uni-osnabrueck.de.86400
NSdns1.sonia.de.86400
NSdeneb.dfn.de.86400
A141.41.235.2986400
MX10 mx2.sonia.de.86400
MX10 mx1.sonia.de.86400
TXT"google-site-verification=CzAJpV3vt_IabIvRbleNCvXHBdsUDwRYx5-RWuIA8YY"300
TXT"atlassian-domain-verification=EWeJdFXykiTTZiaXGIbMnWLumuZJaS3H/4I/KXQQ/z0mJGRHkGAlHVxUI0Fw1s3s"300
TXT"autodesk-domain-verification=Rao8a5MTypII3RTILImQ"300
TXT"HARICA-jKcbyzhRY6Cw9aITvRt"300
TXT"v=spf1 include:sonia.de ?all"300
TXT"MS=FE3F9F35A97CB8D51B01AB5129CC4A2A1516E46C"300
TXT"adobe-idp-site-verification=c18b2eb7398a032f5bfca88e7b06e1412b648888330c6122770fda7b95a4317e"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 1d, MX 1d, 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