njmonline.nl

Checked 22 October 2026, 14:42 UTC · via 8.8.8.8
✗Problems found
16 passed 2 warnings 3 failed 8 info

Registration

info

.nl country-code

Found

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

Delegation

fail

ns1.vz25.nl, ns2.vz1.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.vz25.nl, ns2.vz1.nl
NS in the zone
ns1.vz25.nl, ns2.vz25.nl
NameserverAddressesNetwork (AS)Glue
ns1.vz25.nl109.237.218.51AS48635 CLDIN-NL - Your Hosting B.V., NL109.237.218.51
ns2.vz1.nl (parent only)109.237.219.151AS48635 CLDIN-NL - Your Hosting B.V., NL109.237.219.151
ns2.vz25.nl (zone only)(does not resolve)-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.vz25.nl, ns2.vz1.nl.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns2.vz1.nl; only in the zone: ns2.vz25.nl. ns1.vz25.nl report NS ns1.vz25.nl ns2.vz25.nl.
    #7
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✗
    Nameserver names don't resolve
    These nameservers have no A or AAAA record, so they can't be reached (lame delegation): ns2.vz25.nl.
    #9
  • ✓ 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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns1.vz25.nl, ns2.vz1.nl.
    #13

Nameservers

fail

1 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.vz25.nl 109.237.218.51NOERROR, 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.vz25.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 2025022101 · primary ns1.vz25.nl

Found

Primary (MNAME)
ns1.vz25.nl
Contact (RNAME)
donald.macchain.nl
Serial
2025022101
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
10800 s

Checks

  • ✓ Serial 2025022101 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.vz25.nl is one of the listed nameservers.
  • ✓ Contact donald@macchain.nl #25
    The SOA RNAME donald.macchain.nl means donald@macchain.nl.
  • ✓ Date-based serial #26
    The serial 2025022101 follows the YYYYMMDDnn convention (2025-02-21).

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

7 records at the apex

Found

Read from
109.237.218.51:53
TypeValueTTL
SOAns1.vz25.nl. donald.macchain.nl. 2025022101 10800 3600 604800 10800900
NSns1.vz25.nl.900
NSns2.vz25.nl.900
A109.237.218.51900
MX1 mx2.savvii.email.300
MX1 mx1.savvii.email.300
TXT"v=spf1 a include:spf.mihos.net include:spf.savvii.email ~all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 15m, MX 5m, 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