vakantiejeugdwerk.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/vakantiejeugdwerk.nl returned HTTP 429

  #3

ns0.leaseweb.com, ns1.leaseweb.com

Found

Parent zone

nl

Delegation from

ns1.dns.nl (194.0.28.53)

NS at the parent

ns0.leaseweb.com, ns1.leaseweb.com

NS in the zone

ns0.leaseweb.com, ns1.leaseweb.com

Checks

• i

  2 nameservers

  Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns0.leaseweb.com, ns1.leaseweb.com.

  #6
• ✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
• ✓ 2 autonomous systems #11

  The nameservers are spread over: AS28753 (LEASEWEB-DE-FRA-10 - Leaseweb Deutschland GmbH, DE): 2 addresses; AS7203 (LEASEWEB-USA-SFO - Leaseweb USA, Inc., US): 2 addresses.
• i

  All nameserver names under .com

  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.

serial 2026101605 · primary ns0.leaseweb.eu

Found

Primary (MNAME)

ns0.leaseweb.eu

Contact (RNAME)

postmaster.leaseweb.eu

Serial

2026101605

Refresh / retry

10800 s / 3600 s

Expire

1209600 s

Negative TTL

3600 s

Serial per nameserver

Checks

• ✓ Serial 2026101605 everywhere #22

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

  SOA refresh 3h, retry 1h, expire 14d, negative TTL 1h.
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  Hidden master

  The primary nameserver ns0.leaseweb.eu 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 postmaster@leaseweb.eu #25

  The SOA RNAME postmaster.leaseweb.eu means postmaster@leaseweb.eu.
• ✓ Date-based serial #26

  The serial 2026101605 follows the YYYYMMDDnn convention (2026-10-16).

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 49955 (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.
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  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

8 records at the apex

Found

Read from

23.19.196.53:53

Checks

• ✓ TTLs within range #32

  TTLs: A 5m, AAAA 1h, MX 1h, NS 1h.
• ✓ 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