klaverblad.nl

Checked 22 October 2026, 14:03 UTC · via 8.8.8.8
✗Problems found
26 passed 2 warnings 1 failed 4 info

Registration

info

.nl country-code

Found

TLD
.nl (country-code)
ICANN policies apply
no
Lookup error: https://rdap.sidn.nl/domain/klaverblad.nl returned HTTP 429

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/klaverblad.nl returned HTTP 429
    #3

Delegation

warn

ns1.capitar.dnsprov.com, ns1.capitar.dnsprov.de, ns1.capitar.dnsprov.eu

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.capitar.dnsprov.com, ns1.capitar.dnsprov.de, ns1.capitar.dnsprov.eu
NS in the zone
ns1.capitar.dnsprov.com, ns1.capitar.dnsprov.de, ns1.capitar.dnsprov.eu
NameserverAddressesNetwork (AS)Glue
ns1.capitar.dnsprov.com91.198.103.5AS35383 ZXfactory-AS - Capitar IT Group BV, NL-
ns1.capitar.dnsprov.de138.201.30.61AS24940 HETZNER-AS - Hetzner Online GmbH, DE-
ns1.capitar.dnsprov.eu176.31.124.136AS16276 OVH - OVH SAS, FR-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.capitar.dnsprov.com, ns1.capitar.dnsprov.de, ns1.capitar.dnsprov.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 0 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS16276 (OVH - OVH SAS, FR): 1 address; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 1 address; AS35383 (ZXfactory-AS - Capitar IT Group BV, NL): 1 address.
  • ✓ Nameserver names under 3 TLDs #12
    Nameserver names use the TLDs .com, .de, .eu.
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

fail

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.capitar.dnsprov.com 91.198.103.5NOERROR, 20 ms, authoritativenono / yesrefused9.11.3-1ubuntu1.18-Ubuntu
ns1.capitar.dnsprov.de 138.201.30.61NOERROR, 3 ms, authoritativenoyes / yesrefused9.11.3-1ubuntu1.18-Ubuntu
ns1.capitar.dnsprov.eu 176.31.124.136NOERROR, 15 ms, authoritativenoyes / yesrefused9.11.3-1ubuntu1.18-Ubuntu

Checks

  • ✓ All respond #14
    All 3 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.capitar.dnsprov.com: "9.11.3-1ubuntu1.18-Ubuntu"; ns1.capitar.dnsprov.de: "9.11.3-1ubuntu1.18-Ubuntu"; ns1.capitar.dnsprov.eu: "9.11.3-1ubuntu1.18-Ubuntu". Hide or replace the version string.
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✗
    No DNS over TCP
    DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: ns1.capitar.dnsprov.com (91.198.103.5): dial tcp 91.198.103.5:53: connect: connection refused.
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2026102201 · primary ns1.capitar.dnsprov.com

Found

Primary (MNAME)
ns1.capitar.dnsprov.com
Contact (RNAME)
capitar.dnsprov.com
Serial
2026102201
Refresh / retry
43200 s / 900 s
Expire
2419200 s
Negative TTL
10800 s

Serial per nameserver

NameserverSerial
ns1.capitar.dnsprov.com (91.198.103.5)2026102201
ns1.capitar.dnsprov.de (138.201.30.61)2026102201
ns1.capitar.dnsprov.eu (176.31.124.136)2026102201

Checks

  • ✓ Serial 2026102201 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 15m, expire 28d, negative TTL 3h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.capitar.dnsprov.com is one of the listed nameservers.
  • ✓ Contact capitar@dnsprov.com #25
    The SOA RNAME capitar.dnsprov.com means capitar@dnsprov.com.
  • ✓ Date-based serial #26
    The serial 2026102201 follows the YYYYMMDDnn convention (2026-10-22).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
5 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
6343ECDSAP256SHA256 (13)SHA256 368375557C24F32A…yes

DNSKEY in the zone

Key tagRoleAlgorithm
6343KSK (257)ECDSAP256SHA256 (13)

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 6343 (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

Records

info

6 records at the apex

Found

Read from
91.198.103.5:53
TypeValueTTL
SOAns1.capitar.dnsprov.com. capitar.dnsprov.com. 2026102201 43200 900 2419200 108003600
NSns1.capitar.dnsprov.com.14400
NSns1.capitar.dnsprov.de.14400
NSns1.capitar.dnsprov.eu.14400
A3.122.201.15300
MX10 klaverblad-nl.mail.protection.outlook.com.3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 1h, 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