die-hamburgische-staatsoper.de

Checked 21 October 2026, 22:14 UTC · via 8.8.8.8
✗Problems found
21 passed 2 warnings 1 failed 5 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

ns1.virtualhosts.de, ns2.virtualhosts.de, ns3.virtualhosts.eu

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.virtualhosts.de, ns2.virtualhosts.de, ns3.virtualhosts.eu
NS in the zone
ns1.virtualhosts.de, ns2.virtualhosts.de, ns3.virtualhosts.eu
NameserverAddressesNetwork (AS)Glue
ns1.virtualhosts.de195.128.160.129 2a02:e00:fff0:ba::1AS29141 BKVG-AS - Bradler & Krantz GmbH & Co. KG, DE AS29141 BKVG-AS - Bradler & Krantz GmbH & Co. KG, DE195.128.160.129 2a02:e00:fff0:ba::1
ns2.virtualhosts.de195.68.246.129 2a02:e00:ffed:90::1AS29141 BKVG-AS - Bradler & Krantz GmbH & Co. KG, DE AS29141 BKVG-AS - Bradler & Krantz GmbH & Co. KG, DE195.68.246.129 2a02:e00:ffed:90::1
ns3.virtualhosts.eu80.83.124.49 2a02:e00:ffec:d8::1AS29141 BKVG-AS - Bradler & Krantz GmbH & Co. KG, DE AS29141 BKVG-AS - Bradler & Krantz GmbH & Co. KG, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.virtualhosts.de, ns2.virtualhosts.de, ns3.virtualhosts.eu.
  • ✓ 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 3 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS29141 (BKVG-AS - Bradler & Krantz GmbH & Co. KG, 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, .eu.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

fail

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.virtualhosts.de 195.128.160.129NOERROR, 10 ms, authoritativenoyes / norefused-
ns1.virtualhosts.de 2a02:e00:fff0:ba::1NOERROR, 10 ms, authoritativenono / norefused-
ns2.virtualhosts.de 195.68.246.129NOERROR, 15 ms, authoritativenoyes / norefused-
ns2.virtualhosts.de 2a02:e00:ffed:90::1NOERROR, 15 ms, authoritativenono / norefused-
ns3.virtualhosts.eu 80.83.124.49NOERROR, 13 ms, authoritativenono / norefused-
ns3.virtualhosts.eu 2a02:e00:ffec:d8::1NOERROR, 14 ms, authoritativenono / norefused-

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.
  • ✓ 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.
  • ✗
    No DNS over TCP
    DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: ns1.virtualhosts.de (2a02:e00:fff0:ba::1): dial tcp [2a02:e00:fff0:ba::1]:53: connect: connection refused; ns2.virtualhosts.de (2a02:e00:ffed:90::1): dial tcp [2a02:e00:ffed:90::1]:53: connect: connection refused; ns3.virtualhosts.eu (80.83.124.49): dial tcp 80.83.124.49:53: connect: connection refused; ns3.virtualhosts.eu (2a02:e00:ffec:d8::1): dial tcp [2a02:e00:ffec:d8::1]:53: connect: connection refused.
    #19
  • !
    No EDNS
    These nameservers don't support EDNS(0), needed for DNSSEC and answers larger than 512 bytes: ns1.virtualhosts.de (195.128.160.129), ns1.virtualhosts.de (2a02:e00:fff0:ba::1), ns2.virtualhosts.de (195.68.246.129), ns2.virtualhosts.de (2a02:e00:ffed:90::1), ns3.virtualhosts.eu (80.83.124.49), ns3.virtualhosts.eu (2a02:e00:ffec:d8::1).
    #20
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2026080313 · primary ns1.virtualhosts.de

Found

Primary (MNAME)
ns1.virtualhosts.de
Contact (RNAME)
hostmaster.virtualhosts.de
Serial
2026080313
Refresh / retry
14400 s / 3600 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns1.virtualhosts.de (195.128.160.129)2026080313
ns1.virtualhosts.de (2a02:e00:fff0:ba::1)2026080313
ns2.virtualhosts.de (195.68.246.129)2026080313
ns2.virtualhosts.de (2a02:e00:ffed:90::1)2026080313
ns3.virtualhosts.eu (80.83.124.49)2026080313
ns3.virtualhosts.eu (2a02:e00:ffec:d8::1)2026080313

Checks

  • ✓ Serial 2026080313 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.virtualhosts.de is one of the listed nameservers.
  • ✓ Contact hostmaster@virtualhosts.de #25
    The SOA RNAME hostmaster.virtualhosts.de means hostmaster@virtualhosts.de.
  • ✓ Date-based serial #26
    The serial 2026080313 follows the YYYYMMDDnn convention (2026-08-03).

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
195.128.160.129:53
TypeValueTTL
SOAns1.virtualhosts.de. hostmaster.virtualhosts.de. 2026080313 14400 3600 604800 36003600
NSns3.virtualhosts.eu.259200
NSns2.virtualhosts.de.259200
NSns1.virtualhosts.de.259200
A80.83.122.1023600
MX0 diehamburgischestaatsoper-de0i3b.mail.protection.outlook.com.3600
TXT"apple-domain-verification=zluKIBkx2oFKi96f"3600
TXT"ppe-5520c6e58d5a79831675c4982a078f95f555ec9d"3600
TXT"MS=ms37414169"3600
TXT"google-site-verification=lWjHIz9dtqdYwxTMtd_7nFrXPBDER8mAeD87azuckd8"3600
TXT"v=spf1 a:mx4.eventim.de a:hso01.virtualhosts.de ip4:62.55.182.68 ip4:185.109.198.107 include:spf.protection.outlook.com -all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 3d. The NS TTL at the parent is 1d and in the zone 3d; 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