pa4tw.nl

Checked 22 October 2026, 15:10 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 warnings 0 failed 5 info

Registration

info

.nl country-code

Found

TLD
.nl (country-code)
ICANN policies apply
no
Lookup error: https://rdap.sidn.nl/domain/pa4tw.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/pa4tw.nl returned HTTP 429
    #3

Delegation

info

ns1.transip.nl, ns2.transip.eu, ns2.zuijlen.eu

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.transip.nl, ns2.transip.eu, ns2.zuijlen.eu
NS in the zone
ns1.transip.nl, ns2.transip.eu, ns2.zuijlen.eu
NameserverAddressesNetwork (AS)Glue
ns1.transip.nl195.8.195.195 2a01:7c8:7000:195::195AS20857 TRANSIP-AS - Signet B.V., NL AS20857 TRANSIP-AS - Signet B.V., NL195.8.195.195 2a01:7c8:7000:195::195
ns2.transip.eu37.97.199.195 2a01:7c8:f:c1f::195AS20857 TRANSIP-AS - Signet B.V., NL AS20857 TRANSIP-AS - Signet B.V., NL-
ns2.zuijlen.eu37.97.204.107 2a01:7c8:aac3:427::53AS20857 TRANSIP-AS - Signet B.V., NL AS20857 TRANSIP-AS - Signet B.V., NL-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.transip.nl, ns2.transip.eu, ns2.zuijlen.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 3 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS20857 (TRANSIP-AS - Signet B.V., 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 2 TLDs #12
    Nameserver names use the TLDs .eu, .nl.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.transip.nl 195.8.195.195NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns1.transip.nl 2a01:7c8:7000:195::195NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns2.transip.eu 37.97.199.195NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns2.transip.eu 2a01:7c8:f:c1f::195NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns2.zuijlen.eu 37.97.204.107NOERROR, 11 ms, authoritativenoyes / yesrefusedTWDNS 2.0
ns2.zuijlen.eu 2a01:7c8:aac3:427::53NOERROR, 13 ms, authoritativenoyes / yesrefusedTWDNS 2.0

Checks

  • ✓ All respond #14
    All 6 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: ns2.zuijlen.eu: "TWDNS 2.0". Hide or replace the version string.
    #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

info

serial 27 · primary ns.zuijlen.eu

Found

Primary (MNAME)
ns.zuijlen.eu
Contact (RNAME)
hostmaster.zuijlen.eu
Serial
27
Refresh / retry
14400 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.transip.nl (195.8.195.195)27
ns1.transip.nl (2a01:7c8:7000:195::195)27
ns2.transip.eu (37.97.199.195)27
ns2.transip.eu (2a01:7c8:f:c1f::195)27
ns2.zuijlen.eu (37.97.204.107)27
ns2.zuijlen.eu (2a01:7c8:aac3:427::53)27

Checks

  • ✓ Serial 27 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 2h, expire 7d, negative TTL 1d.
  • i
    Hidden master
    The primary nameserver ns.zuijlen.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 hostmaster@zuijlen.eu #25
    The SOA RNAME hostmaster.zuijlen.eu means hostmaster@zuijlen.eu.
  • ✓ Counter serial #26
    The serial 27 is a plain counter.

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

9 records at the apex

Found

Read from
195.8.195.195:53
TypeValueTTL
SOAns.zuijlen.eu. hostmaster.zuijlen.eu. 27 14400 7200 604800 8640086400
NSns2.zuijlen.eu.86400
NSns2.transip.eu.86400
NSns1.transip.nl.86400
A194.109.192.23186400
AAAA2001:888:20b9:1::286400
MX10 mail.zuijlen.eu.86400
MX20 relay.transip.nl.86400
TXT"google-site-verification=15WyvGzKexOnLsGNDeJk2caFMJGoPSJpd1TA3MnAkgg"86400

Checks

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