visittirol.nl

.nl country-code

Found

TLD

.nl (country-code)

ICANN policies apply

no

Checks

• i

  .nl 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

  .nl is delegated in the root zone and DNSSEC-signed.
• i

  Could not be checked

  The RDAP lookup failed, so this could not be checked: https://rdap.sidn.nl/domain/visittirol.nl returned HTTP 429

  #3

ispconfig3.ikbnet.at, ns4.ikbnet.at, ns5.ikbnet.at

Found

Parent zone

nl

Delegation from

ns1.dns.nl (194.0.28.53)

NS at the parent

ispconfig3.ikbnet.at, ns4.ikbnet.at, ns5.ikbnet.at

NS in the zone

ispconfig3.ikbnet.at, ns4.ikbnet.at, ns5.ikbnet.at

Checks

• ✓ 3 nameservers #6

  Delegated to ispconfig3.ikbnet.at, ns4.ikbnet.at, ns5.ikbnet.at.
• ✓ 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.
• i

  One address family in one network

  all IPv6 addresses are in 2a02:6180::/48, while the other address family is spread over several networks.

  #10
• i

  All nameservers in one AS

  All nameserver addresses are announced by one network operator (AS31510 (IKB-AS - Innsbrucker Kommunalbetriebe AG, AT): 5 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 .at

  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
• i

  Partly IPv6

  These nameservers have no IPv6 address: ispconfig3.ikbnet.at.

  #13

5 of 5 addresses answer authoritatively

Found

Checks

• ✓ All respond #14

  All 5 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: ispconfig3.ikbnet.at: "not supported"; ns4.ikbnet.at: "not supported"; ns5.ikbnet.at: "not supported".

  #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.

serial 2025012706 · primary ns.visittirol.nl

Found

Primary (MNAME)

ns.visittirol.nl

Contact (RNAME)

hostmaster.ikbnet.at

Serial

2025012706

Refresh / retry

28800 s / 7200 s

Expire

604800 s

Negative TTL

86400 s

Serial per nameserver

Checks

• ✓ Serial 2025012706 everywhere #22

  All nameservers serve the same version of the zone.
• ✓ Timers within recommendations #23

  SOA refresh 8h, retry 2h, expire 7d, negative TTL 1d.
• i

  Hidden master (not resolvable)

  The primary nameserver ns.visittirol.nl is not listed as a nameserver and does not resolve publicly: a hidden master, or a placeholder name. Some tools (e.g. dynamic updates) use MNAME to find the primary.

  #24
• ✓ Contact hostmaster@ikbnet.at #25

  The SOA RNAME hostmaster.ikbnet.at means hostmaster@ikbnet.at.
• ✓ Date-based serial #26

  The serial 2025012706 follows the YYYYMMDDnn convention (2025-01-27).

9 records at the apex

Found

Read from

83.175.70.44:53

Checks

• ✓ TTLs within range #32

  TTLs: A 1h, MX 1h, NS 1d. The NS TTL at the parent is 1h and in the zone 1d; 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