treinreiziger.nl

Checked 22 October 2026, 16:40 UTC · via 8.8.8.8
!Passed with warnings
24 passed 1 warning 0 failed 7 info

Registration

info

.nl country-code

Found

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

Delegation

info

kai.ns.cloudflare.com, zara.ns.cloudflare.com

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
kai.ns.cloudflare.com, zara.ns.cloudflare.com
NS in the zone
kai.ns.cloudflare.com, zara.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
kai.ns.cloudflare.com108.162.193.188 172.64.33.188 173.245.59.188 2606:4700:58::adf5:3bbc 2803:f800:50::6ca2:c1bc 2a06:98c1:50::ac40:21bcAS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-
zara.ns.cloudflare.com173.245.58.148 108.162.192.148 172.64.32.148 2a06:98c1:50::ac40:2094 2606:4700:50::adf5:3a94 2803:f800:50::6ca2:c094AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: kai.ns.cloudflare.com, zara.ns.cloudflare.com.
    #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 6 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 12 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 .com
    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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
kai.ns.cloudflare.com 108.162.193.188NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kai.ns.cloudflare.com 172.64.33.188NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
kai.ns.cloudflare.com 173.245.59.188NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kai.ns.cloudflare.com 2606:4700:58::adf5:3bbcNOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
kai.ns.cloudflare.com 2803:f800:50::6ca2:c1bcNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kai.ns.cloudflare.com 2a06:98c1:50::ac40:21bcNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
zara.ns.cloudflare.com 173.245.58.148NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
zara.ns.cloudflare.com 108.162.192.148NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
zara.ns.cloudflare.com 172.64.32.148NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
zara.ns.cloudflare.com 2a06:98c1:50::ac40:2094NOERROR, 19 ms, authoritativenoyes / yesrefused2026.10.2
zara.ns.cloudflare.com 2606:4700:50::adf5:3a94NOERROR, 18 ms, authoritativenoyes / yesrefused2026.10.2
zara.ns.cloudflare.com 2803:f800:50::6ca2:c094NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2

Checks

  • ✓ All respond #14
    All 12 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: kai.ns.cloudflare.com: "2026.10.2"; zara.ns.cloudflare.com: "2026.10.2". 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

pass

serial 2418065033 · primary kai.ns.cloudflare.com

Found

Primary (MNAME)
kai.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2418065033
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
kai.ns.cloudflare.com (108.162.193.188)2418065033
kai.ns.cloudflare.com (172.64.33.188)2418065033
kai.ns.cloudflare.com (173.245.59.188)2418065033
kai.ns.cloudflare.com (2606:4700:58::adf5:3bbc)2418065033
kai.ns.cloudflare.com (2803:f800:50::6ca2:c1bc)2418065033
kai.ns.cloudflare.com (2a06:98c1:50::ac40:21bc)2418065033
zara.ns.cloudflare.com (173.245.58.148)2418065033
zara.ns.cloudflare.com (108.162.192.148)2418065033
zara.ns.cloudflare.com (172.64.32.148)2418065033
zara.ns.cloudflare.com (2a06:98c1:50::ac40:2094)2418065033
zara.ns.cloudflare.com (2606:4700:50::adf5:3a94)2418065033
zara.ns.cloudflare.com (2803:f800:50::6ca2:c094)2418065033

Checks

  • ✓ Serial 2418065033 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h46m40s, retry 40m, expire 7d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver kai.ns.cloudflare.com is one of the listed nameservers.
  • ✓ Contact dns@cloudflare.com #25
    The SOA RNAME dns.cloudflare.com means dns@cloudflare.com.
  • ✓ Timestamp serial #26
    The serial 2418065033 is a Unix timestamp (2046-08-16 20:43 UTC).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Signatures valid until
23 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
2371ECDSAP256SHA256 (13)SHA256 033671AEE71172A7…yes

DNSKEY in the zone

Key tagRoleAlgorithm
2371KSK (257)ECDSAP256SHA256 (13)
34505ZSK (256)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 2371 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 50h0m0s and created on demand; the current one was made at 2026-10-21 15:40 UTC and expires at 2026-10-23 17:40 UTC.

Records

info

21 records at the apex

Found

Read from
108.162.193.188:53
TypeValueTTL
SOAkai.ns.cloudflare.com. dns.cloudflare.com. 2418065033 10000 2400 604800 18001800
NSkai.ns.cloudflare.com.86400
NSzara.ns.cloudflare.com.86400
A172.67.75.95300
A104.26.13.234300
A104.26.12.234300
AAAA2606:4700:20::681a:cea300
AAAA2606:4700:20::ac43:4b5f300
AAAA2606:4700:20::681a:dea300
MX1 aspmx.l.google.com.3600
MX10 aspmx2.googlemail.com.3600
MX10 aspmx3.googlemail.com.3600
MX5 alt1.aspmx.l.google.com.3600
MX5 alt2.aspmx.l.google.com.3600
TXT"facebook-domain-verification=cts7pyfsyiv1cma1s20gmlxqsm0kdo"300
TXT"google-site-verification=RVDd51YeD7sfKnxHAb3Q3sJdFWFOKoyhL25KLfLFnJc"300
TXT"google-site-verification=WNdfGUS1IEXrks4-YfFx8kfNHp3u98tZZj3Imz_oXZY"300
TXT"google-site-verification=sC1_ZpOzcNN1KDg3QvtldeHaJRYNt5SqQdYCtS8eTvQ"300
TXT"v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAk99BUiTcJv6nlCCIzts22tiHyaAY6+P//SiO8zmwX+rhimzOsZ7Yj5sh2zRmnlQj7qzUlgRHzXczgC8T7T5cyWKCAKrd/fLw/r5FhX+dG/qVytZnApMKosVlgf2vD+mbxBEAqsc74NIgrPQ5peC1FeVxSm5QbItl8dq0+5u66iATTm7BaejoInMSvXVKxClNF" "Rutov340cQjFxwu1JyVecNCNg5CZk6WqIBiCbSCaaKF8UK5kVSk/0sjzl1Z9F1N77MfJoIrJQXR8tj3qZLU/6r6q4Wqdp/WLc83mj8KCrGjfaaGlaZt+S3RfyaX6JaktF2H+0zLC8FNAJGf8kRLvQIDAQAB"300
TXT"v=DMARC1; p=reject; rua=mailto:hildebrand@treinreiziger.nl, mailto:jan@creaton.nl"300
TXT"v=spf1 include:_spf.google.com -all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 1h, 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.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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