karelv.nl

Checked 22 October 2026, 14:01 UTC · via 8.8.8.8
✗Problems found
18 passed 2 warnings 2 failed 7 info

Registration

info

.nl country-code

Found

TLD
.nl (country-code)
ICANN policies apply
no
Lookup error: https://rdap.sidn.nl/domain/karelv.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/karelv.nl returned HTTP 429
    #3

Delegation

warn

ns1.vz24.nl, ns2.vz1.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.vz24.nl, ns2.vz1.nl
NS in the zone
ns1.vz24.nl, ns2.vz1.nl
NameserverAddressesNetwork (AS)Glue
ns1.vz24.nl109.237.218.50AS48635 CLDIN-NL - Your Hosting B.V., NL109.237.218.50
ns2.vz1.nl109.237.219.151AS48635 CLDIN-NL - Your Hosting B.V., NL109.237.219.151

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.vz24.nl, ns2.vz1.nl.
    #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 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS48635 (CLDIN-NL - Your Hosting B.V., NL): 2 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 .nl
    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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

fail

1 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.vz24.nl 109.237.218.50NOERROR, 10 ms, authoritativenoyes / yesrefusednone
ns2.vz1.nl 109.237.219.151NOERROR, 10 ms, NOT authoritativeOPENyes / yesrefusednone

Checks

  • ✓ All respond #14
    All 2 nameserver addresses answered.
  • ✗
    Lame delegation
    These nameservers don't answer authoritatively for the zone, so resolvers ignore them: ns2.vz1.nl (109.237.219.151): NOERROR, authoritative=false.
    #15
  • ✗
    Open recursion
    These nameservers resolve names for anyone, which makes them usable for DNS amplification attacks and cache poisoning: ns2.vz1.nl (109.237.219.151). Disable recursion on authoritative servers.
    #16
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns1.vz24.nl: "none"; ns2.vz1.nl: "none".
    #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.

SOA

pass

serial 1779970202 · primary ns1.vz24.nl

Found

Primary (MNAME)
ns1.vz24.nl
Contact (RNAME)
administrator.karelv.nl
Serial
1779970202
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
10800 s

Checks

  • ✓ Serial 1779970202 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 3h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.vz24.nl is one of the listed nameservers.
  • ✓ Contact administrator@karelv.nl #25
    The SOA RNAME administrator.karelv.nl means administrator@karelv.nl.
  • ✓ Timestamp serial #26
    The serial 1779970202 is a Unix timestamp (2026-05-28 12:10 UTC).

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

info

10 records at the apex

Found

Read from
109.237.218.50:53
TypeValueTTL
SOAns1.vz24.nl. administrator.karelv.nl. 1779970202 10800 3600 604800 10800300
NSns1.vz24.nl.300
NSns2.vz1.nl.300
A194.76.145.200300
MX5 karelv-nl.mail.protection.outlook.com.300
TXT"MS=ms34734978"300
TXT"3e877bdb084403184e6faf93258cc98c9af955b46746f89f7e8bb70c2c85e637 "300
TXT"apple-domain-verification=cmpv3Cz6e60KLrDx"300
TXT"e1ed1633978eb9b696b323807b6f16900ed525ad7732b107e8bf38e80aabba04"300
TXT"v=spf1 mx a ip4:92.64.226.80/29 ip4:213.125.56.139 ip4:83.98.211.0/24 include:spf.protection.outlook.com include:spf.flowmailer.net include:spf.routit.net include:oracleindustry.com ~all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, NS 5m. The NS TTL at the parent is 1h and in the zone 5m; 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