staatsoper-stuttgart.de

Checked 22 October 2026, 00:30 UTC · via 8.8.8.8
!Passed with warnings
24 passed 1 warning 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

info

anexia.fifthns.com, anexia.firstns.cc, anexia.fourthns.systems, anexia.secondns.at, anexia.thirdns.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
anexia.fifthns.com, anexia.firstns.cc, anexia.fourthns.systems, anexia.secondns.at, anexia.thirdns.de
NS in the zone
anexia.fifthns.com, anexia.firstns.cc, anexia.fourthns.systems, anexia.secondns.at, anexia.thirdns.de
NameserverAddressesNetwork (AS)Glue
anexia.fifthns.com213.227.168.116 2a00:11c0:82:359::1004AS42473 AS-ANEXIA - Anexia Cloud Solutions GmbH, AT AS42473 AS-ANEXIA - Anexia Cloud Solutions GmbH, AT-
anexia.firstns.cc45.84.253.112 2a00:11c0:66::210AS42473 AS-ANEXIA - Anexia Cloud Solutions GmbH, AT AS42473 AS-ANEXIA - Anexia Cloud Solutions GmbH, AT-
anexia.fourthns.systems188.172.219.104 2a00:11c0:63:350::1004AS42473 AS-ANEXIA - Anexia Cloud Solutions GmbH, AT AS42473 AS-ANEXIA - Anexia Cloud Solutions GmbH, AT-
anexia.secondns.at37.252.225.36 2a00:11c0:2:998::30AS42473 AS-ANEXIA - Anexia Cloud Solutions GmbH, AT AS42473 AS-ANEXIA - Anexia Cloud Solutions GmbH, AT-
anexia.thirdns.de217.146.22.148 2a00:11c0:e:ffff:1::4AS42473 AS-ANEXIA - Anexia Cloud Solutions GmbH, AT AS42473 AS-ANEXIA - Anexia Cloud Solutions GmbH, AT-

Checks

  • ✓ 5 nameservers #6
    Delegated to anexia.fifthns.com, anexia.firstns.cc, anexia.fourthns.systems, anexia.secondns.at, anexia.thirdns.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.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 5 IPv4 /24s and 5 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS42473 (AS-ANEXIA - Anexia Cloud Solutions GmbH, AT): 10 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 5 TLDs #12
    Nameserver names use the TLDs .at, .cc, .com, .de, .systems.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

10 of 10 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
anexia.fifthns.com 213.227.168.116NOERROR, 9 ms, authoritativenoyes / yesrefused-
anexia.fifthns.com 2a00:11c0:82:359::1004NOERROR, 8 ms, authoritativenoyes / yesrefused-
anexia.firstns.cc 45.84.253.112NOERROR, 10 ms, authoritativenoyes / yesrefused-
anexia.firstns.cc 2a00:11c0:66::210NOERROR, 10 ms, authoritativenoyes / yesrefused-
anexia.fourthns.systems 188.172.219.104NOERROR, 11 ms, authoritativenoyes / yesrefused-
anexia.fourthns.systems 2a00:11c0:63:350::1004NOERROR, 17 ms, authoritativenoyes / yesrefused-
anexia.secondns.at 37.252.225.36NOERROR, 13 ms, authoritativenoyes / yesrefused-
anexia.secondns.at 2a00:11c0:2:998::30NOERROR, 13 ms, authoritativenoyes / yesrefused-
anexia.thirdns.de 217.146.22.148NOERROR, 3 ms, authoritativenoyes / yesrefused-
anexia.thirdns.de 2a00:11c0:e:ffff:1::4NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 10 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 15 · primary anexia.secondns.at

Found

Primary (MNAME)
anexia.secondns.at
Contact (RNAME)
support.anexia.at
Serial
15
Refresh / retry
10000 s / 7200 s
Expire
1209600 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
anexia.fifthns.com (213.227.168.116)15
anexia.fifthns.com (2a00:11c0:82:359::1004)15
anexia.firstns.cc (45.84.253.112)15
anexia.firstns.cc (2a00:11c0:66::210)15
anexia.fourthns.systems (188.172.219.104)15
anexia.fourthns.systems (2a00:11c0:63:350::1004)15
anexia.secondns.at (37.252.225.36)15
anexia.secondns.at (2a00:11c0:2:998::30)15
anexia.thirdns.de (217.146.22.148)15
anexia.thirdns.de (2a00:11c0:e:ffff:1::4)15

Checks

  • ✓ Serial 15 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h46m40s, retry 2h, expire 14d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver anexia.secondns.at is one of the listed nameservers.
  • ✓ Contact support@anexia.at #25
    The SOA RNAME support.anexia.at means support@anexia.at.
  • ✓ Counter serial #26
    The serial 15 is a plain counter.

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

8 records at the apex

Found

Read from
213.227.168.116:53
TypeValueTTL
SOAanexia.secondns.at. support.anexia.at. 15 10000 7200 1209600 36003600
NSanexia.firstns.cc.3600
NSanexia.fourthns.systems.3600
NSanexia.thirdns.de.3600
NSanexia.secondns.at.3600
NSanexia.fifthns.com.3600
A37.235.0.22300
TXT"D-TRUST=YI456OCTO4PGPKJUODF9YX4"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, NS 1h. The NS TTL at the parent is 1d and in the zone 1h; 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