wensink.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/wensink.nl returned HTTP 429

  #3

ns1.computel-standby.nl, ns2.computel-standby.net, ns3.computel-standby.eu

Found

Parent zone

nl

Delegation from

ns1.dns.nl (194.0.28.53)

NS at the parent

ns1.computel-standby.nl, ns2.computel-standby.net, ns3.computel-standby.eu

NS in the zone

ns1.computel-standby.nl, ns2.computel-standby.net, ns3.computel-standby.eu

Checks

• ✓ 3 nameservers #6

  Delegated to ns1.computel-standby.nl, ns2.computel-standby.net, ns3.computel-standby.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 2 IPv6 /48s.
• i

  All nameservers in one AS

  All nameserver addresses are announced by one network operator (AS31383 (NEDERLANDNET-AS - Computel Standby BV, NL): 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 3 TLDs #12

  Nameserver names use the TLDs .eu, .net, .nl.
• ✓ All reachable over IPv6 #13

  Every nameserver has an IPv6 address.

serial 2022071106 · primary ns0.computel-standby.nl

Found

Primary (MNAME)

ns0.computel-standby.nl

Contact (RNAME)

hostmaster.computel.nl

Serial

2022071106

Refresh / retry

14400 s / 3600 s

Expire

604800 s

Negative TTL

14400 s

Serial per nameserver

Checks

• ✓ Serial 2022071106 everywhere #22

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

  SOA refresh 4h, retry 1h, expire 7d, negative TTL 4h.
• i

  Hidden master

  The primary nameserver ns0.computel-standby.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 hostmaster@computel.nl #25

  The SOA RNAME hostmaster.computel.nl means hostmaster@computel.nl.
• ✓ Date-based serial #26

  The serial 2022071106 follows the YYYYMMDDnn convention (2022-07-11).

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 35197 (SHA256).
• ✓ Modern algorithms #29

  Key algorithms: RSASHA256 (8).
• ✓ 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

28 records at the apex

Found

Read from

78.41.78.126:53

Checks

• ✓ TTLs within range #32

  TTLs: A 5m, AAAA 5m, MX 5m, NS 4h. The NS TTL at the parent is 1h and in the zone 4h; 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