welzorg.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/welzorg.nl returned HTTP 429

  #3

dns41.cloudns.net, dns42.cloudns.net, dns43.cloudns.net, dns44.cloudns.net

Found

Parent zone

nl

Delegation from

ns1.dns.nl (194.0.28.53)

NS at the parent

dns41.cloudns.net, dns42.cloudns.net, dns43.cloudns.net, dns44.cloudns.net

NS in the zone

dns41.cloudns.net, dns42.cloudns.net, dns43.cloudns.net, dns44.cloudns.net

Checks

• ✓ 4 nameservers #6

  Delegated to dns41.cloudns.net, dns42.cloudns.net, dns43.cloudns.net, dns44.cloudns.net.
• ✓ 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 2a06:fb00:1::/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 (AS203391 (CLOUDNSNET - Cloud DNS Ltd, BG): 8 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 .net

  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
• ✓ All reachable over IPv6 #13

  Every nameserver has an IPv6 address.

8 of 8 addresses answer authoritatively

Found

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.
• i

  Identifying string disclosed

  These nameservers answer version queries with a string that is not a version number: dns41.cloudns.net: "de3-14"; dns42.cloudns.net: "de3-14"; dns43.cloudns.net: "de3-14"; dns44.cloudns.net: "de3-14".

  #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 2026102201 · primary ns1.xb.nl

Found

Primary (MNAME)

ns1.xb.nl

Contact (RNAME)

linuxbeheer.detroncloud.nl

Serial

2026102201

Refresh / retry

3600 s / 300 s

Expire

2419200 s

Negative TTL

300 s

Serial per nameserver

Checks

• ✓ Serial 2026102201 everywhere #22

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

  SOA refresh 1h, retry 5m, expire 28d, negative TTL 5m.
• i

  Hidden master

  The primary nameserver ns1.xb.nl is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.

  #24
• ✓ Contact linuxbeheer@detroncloud.nl #25

  The SOA RNAME linuxbeheer.detroncloud.nl means linuxbeheer@detroncloud.nl.
• ✓ Date-based serial #26

  The serial 2026102201 follows the YYYYMMDDnn convention (2026-10-22).

Signed, DS published at parent

Found

Validated by resolver

yes

Denial of existence

NSEC

Signatures valid until

5 November 2026

DS at the parent

DNSKEY in the zone

Checks

• ✓ Signed and validated #27

  The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
• ✓ DS matches a key #28

  The DS record at the parent matches a key in the zone: key tag 50575 (SHA256).
• ✓ Modern algorithms #29

  Key algorithms: ECDSAP256SHA256 (13).
• ✓ Signatures valid until 2026-11-05 #30

  The earliest DNSKEY/SOA signature expires at 2026-11-05 00:00 UTC.
• i

  NSEC

  The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.

  #31

15 records at the apex

Found

Read from

185.136.96.200:53

Checks

• ✓ TTLs within range #32

  TTLs: A 15m, MX 1h, NS 15m. The NS TTL at the parent is 1h and in the zone 15m; 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