idw-online.de

Checked 21 October 2026, 22:51 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

warn

helium.ns.hetzner.de, hydrogen.ns.hetzner.com, ns1.your-server.de, oxygen.ns.hetzner.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
helium.ns.hetzner.de, hydrogen.ns.hetzner.com, ns1.your-server.de, oxygen.ns.hetzner.com
NS in the zone
helium.ns.hetzner.de, hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com
NameserverAddressesNetwork (AS)Glue
helium.ns.hetzner.de193.47.99.5 2001:67c:192c::add:5AS12337 NORIS-NETWORK - noris network AG, DE AS12337 NORIS-NETWORK - noris network AG, DE-
hydrogen.ns.hetzner.com213.133.100.98 2a01:4f8:0:1::add:1098AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE-
ns1.your-server.de (parent only)213.133.100.102 2a01:4f8:0:1::5ddc:1AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE213.133.100.102 2a01:4f8:0:1::5ddc:1
oxygen.ns.hetzner.com88.198.229.192 2a01:4f8:0:1::add:2992AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE-

Checks

  • ✓ 4 nameservers #6
    Delegated to helium.ns.hetzner.de, hydrogen.ns.hetzner.com, ns1.your-server.de, oxygen.ns.hetzner.com.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns1.your-server.de. helium.ns.hetzner.de, hydrogen.ns.hetzner.com, ns1.your-server.de, oxygen.ns.hetzner.com report NS helium.ns.hetzner.de hydrogen.ns.hetzner.com oxygen.ns.hetzner.com.
    #7
  • ✓ 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: AS12337 (NORIS-NETWORK - noris network AG, DE): 2 addresses; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 6 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .de.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
helium.ns.hetzner.de 193.47.99.5NOERROR, 6 ms, authoritativenoyes / yesrefused-
helium.ns.hetzner.de 2001:67c:192c::add:5NOERROR, 6 ms, authoritativenoyes / yesrefused-
hydrogen.ns.hetzner.com 213.133.100.98NOERROR, 3 ms, authoritativenoyes / yesrefused-
hydrogen.ns.hetzner.com 2a01:4f8:0:1::add:1098NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns1.your-server.de 213.133.100.102NOERROR, 2 ms, authoritativenoyes / yesrefused-
ns1.your-server.de 2a01:4f8:0:1::5ddc:1NOERROR, 2 ms, authoritativenoyes / yesrefused-
oxygen.ns.hetzner.com 88.198.229.192NOERROR, 4 ms, authoritativenoyes / yesrefused-
oxygen.ns.hetzner.com 2a01:4f8:0:1::add:2992NOERROR, 4 ms, authoritativenoyes / yesrefused-

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.
  • ✓ 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 2026102000 · primary ns1.your-server.de

Found

Primary (MNAME)
ns1.your-server.de
Contact (RNAME)
postmaster.your-server.de
Serial
2026102000
Refresh / retry
86400 s / 10800 s
Expire
3600000 s
Negative TTL
7200 s

Serial per nameserver

NameserverSerial
helium.ns.hetzner.de (193.47.99.5)2026102000
helium.ns.hetzner.de (2001:67c:192c::add:5)2026102000
hydrogen.ns.hetzner.com (213.133.100.98)2026102000
hydrogen.ns.hetzner.com (2a01:4f8:0:1::add:1098)2026102000
ns1.your-server.de (213.133.100.102)2026102000
ns1.your-server.de (2a01:4f8:0:1::5ddc:1)2026102000
oxygen.ns.hetzner.com (88.198.229.192)2026102000
oxygen.ns.hetzner.com (2a01:4f8:0:1::add:2992)2026102000

Checks

  • ✓ Serial 2026102000 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 3h, expire 1000h, negative TTL 2h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.your-server.de is one of the listed nameservers.
  • ✓ Contact postmaster@your-server.de #25
    The SOA RNAME postmaster.your-server.de means postmaster@your-server.de.
  • ✓ Date-based serial #26
    The serial 2026102000 follows the YYYYMMDDnn convention (2026-10-20).

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

11 records at the apex

Found

Read from
193.47.99.5:53
TypeValueTTL
SOAns1.your-server.de. postmaster.your-server.de. 2026102000 86400 10800 3600000 72007200
NShydrogen.ns.hetzner.com.7200
NSoxygen.ns.hetzner.com.7200
NShelium.ns.hetzner.de.7200
A116.203.62.447200
MX10 mail.idw-online.de.7200
MX10 dedi2031.your-server.de.7200
TXT"google-site-verification=E0oPW3nC-8CJWrR0iWr9vG-nbtxeBxagmhvrixtd51U"7200
TXT"v=spf1 a mx a:mail.your-server.de include:spf.protection.outlook.com include:spf.sendinblue.com ~all"7200
TXT"MS=ms33198436"7200
TXT"Sendinblue-code:fcc09dc0287c4d815c57c01214c60305"7200

Checks

  • ✓ TTLs within range #32
    TTLs: A 2h, MX 2h, NS 2h. The NS TTL at the parent is 1d and in the zone 2h; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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