ihk-nuernberg.de

Checked 21 October 2026, 22:52 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 3 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

dns.osn.de, dns.osn.net, dns.osn.org

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns.osn.de, dns.osn.net, dns.osn.org
NS in the zone
dns.osn.de, dns.osn.net, dns.osn.org
NameserverAddressesNetwork (AS)Glue
dns.osn.de194.45.27.73AS8859 OSN - OSN Online Service Nuernberg GmbH, DE194.45.27.73
dns.osn.net95.179.241.54AS20473 AS-VULTR - The Constant Company, LLC, US-
dns.osn.org213.241.148.43AS8859 OSN - OSN Online Service Nuernberg GmbH, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to dns.osn.de, dns.osn.net, dns.osn.org.
  • ✓ 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 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20473 (AS-VULTR - The Constant Company, LLC, US): 1 address; AS8859 (OSN - OSN Online Service Nuernberg GmbH, DE): 2 addresses.
  • ✓ Nameserver names under 3 TLDs #12
    Nameserver names use the TLDs .de, .net, .org.
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

pass

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns.osn.de 194.45.27.73NOERROR, 1 ms, authoritativenoyes / yesrefused-
dns.osn.net 95.179.241.54NOERROR, 5 ms, authoritativenoyes / yesrefused-
dns.osn.org 213.241.148.43NOERROR, 3 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 3 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 1790759801 · primary dns.osn.de

Found

Primary (MNAME)
dns.osn.de
Contact (RNAME)
root.osn.de
Serial
1790759801
Refresh / retry
14400 s / 3600 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
dns.osn.de (194.45.27.73)1790759801
dns.osn.net (95.179.241.54)1790759801
dns.osn.org (213.241.148.43)1790759801

Checks

  • ✓ Serial 1790759801 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns.osn.de is one of the listed nameservers.
  • ✓ Contact root@osn.de #25
    The SOA RNAME root.osn.de means root@osn.de.
  • ✓ Timestamp serial #26
    The serial 1790759801 is a Unix timestamp (2026-09-30 09:16 UTC).

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

13 records at the apex

Found

Read from
194.45.27.73:53
TypeValueTTL
SOAdns.osn.de. root.osn.de. 1790759801 14400 3600 1209600 86400600
NSdns.osn.net.600
NSdns.osn.org.600
NSdns.osn.de.600
A212.114.69.157600
MX30 mx2.osn.de.600
MX40 mx3.osn.de.600
MX10 mx1.osn.de.600
TXT"google-site-verification=9-9cMN0w1g-3dTxLxI6fu4RZZYoGgzzCWvlUv5aVHIU"600
TXT"v=spf1 a mx ip4:212.114.69.162 ip4:212.114.69.135 ip4:212.114.69.157 include:osn.de include:spf.ihk.de ~all"600
TXT"D-TRUST=Y8ZQQECYTJ4LSJ6CS2HLU3H"600
TXT"D-TRUST=SHGON9HISZU7PKQOKGO4MBA"600
TXT"D-TRUST=ZC5EDP4YXUIXXJEEBERQC2Y"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 10m, NS 10m. The NS TTL at the parent is 1d and in the zone 10m; 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