cda.nl

Checked 21 October 2026, 21:00 UTC · via 8.8.8.8
!Passed with warnings
24 passed 1 warning 0 failed 8 info

Registration

info

.nl country-code

Found

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

Delegation

info

ximena.ns.cloudflare.com, zahir.ns.cloudflare.com

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ximena.ns.cloudflare.com, zahir.ns.cloudflare.com
NS in the zone
ximena.ns.cloudflare.com, zahir.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
ximena.ns.cloudflare.com172.64.34.10 108.162.194.10 162.159.38.10 2803:f800:50::6ca2:c20a 2a06:98c1:50::ac40:220a 2606:4700:50::a29f:260aAS13335 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-
zahir.ns.cloudflare.com172.64.35.145 108.162.195.145 162.159.44.145 2a06:98c1:50::ac40:2391 2803:f800:50::6ca2:c391 2606:4700:58::a29f:2c91AS13335 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: ximena.ns.cloudflare.com, zahir.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
ximena.ns.cloudflare.com 172.64.34.10NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
ximena.ns.cloudflare.com 108.162.194.10NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
ximena.ns.cloudflare.com 162.159.38.10NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
ximena.ns.cloudflare.com 2803:f800:50::6ca2:c20aNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
ximena.ns.cloudflare.com 2a06:98c1:50::ac40:220aNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
ximena.ns.cloudflare.com 2606:4700:50::a29f:260aNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
zahir.ns.cloudflare.com 172.64.35.145NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
zahir.ns.cloudflare.com 108.162.195.145NOERROR, 18 ms, authoritativenoyes / yesrefused2026.10.2
zahir.ns.cloudflare.com 162.159.44.145NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
zahir.ns.cloudflare.com 2a06:98c1:50::ac40:2391NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
zahir.ns.cloudflare.com 2803:f800:50::6ca2:c391NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
zahir.ns.cloudflare.com 2606:4700:58::a29f:2c91NOERROR, 15 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: ximena.ns.cloudflare.com: "2026.10.2"; zahir.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 2417957307 · primary ximena.ns.cloudflare.com

Found

Primary (MNAME)
ximena.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417957307
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
ximena.ns.cloudflare.com (172.64.34.10)2417957307
ximena.ns.cloudflare.com (108.162.194.10)2417957307
ximena.ns.cloudflare.com (162.159.38.10)2417957307
ximena.ns.cloudflare.com (2803:f800:50::6ca2:c20a)2417957307
ximena.ns.cloudflare.com (2a06:98c1:50::ac40:220a)2417957307
ximena.ns.cloudflare.com (2606:4700:50::a29f:260a)2417957307
zahir.ns.cloudflare.com (172.64.35.145)2417957307
zahir.ns.cloudflare.com (108.162.195.145)2417957307
zahir.ns.cloudflare.com (162.159.44.145)2417957307
zahir.ns.cloudflare.com (2a06:98c1:50::ac40:2391)2417957307
zahir.ns.cloudflare.com (2803:f800:50::6ca2:c391)2417957307
zahir.ns.cloudflare.com (2606:4700:58::a29f:2c91)2417957307

Checks

  • ✓ Serial 2417957307 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 ximena.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 2417957307 is a Unix timestamp (2046-08-15 14:48 UTC).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
22 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
2371ECDSAP256SHA256 (13)SHA256 77C4E9111BA1122D…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 2026-10-20 20:00 UTC and expires at 2026-10-22 22:00 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

22 records at the apex

Found

Read from
172.64.34.10:53
TypeValueTTL
SOAximena.ns.cloudflare.com. dns.cloudflare.com. 2417957307 10000 2400 604800 18001800
NSximena.ns.cloudflare.com.86400
NSzahir.ns.cloudflare.com.86400
A104.26.6.180300
A104.26.7.180300
A172.67.69.156300
AAAA2606:4700:20::681a:6b4300
AAAA2606:4700:20::681a:7b4300
AAAA2606:4700:20::ac43:459c300
MX0 cda-nl.e-v1.mx.microsoft.300
TXT"00d24000000f1breaa"300
TXT"MS=ms34256232"300
TXT"_prkww9i5007kptenzxbuta7dxxsvycm"300
TXT"amazonses:jeoHC2EqvD+GEyxSbQPuOwRkNi/7LulWxui+q3MxrhE="300
TXT"canva-site-verification=F6RXDpoHUeH2W65qrgmZLg"300
TXT"facebook-domain-verification=aew3s2vv6nd6yq1d1c51dif3qlx9sa"300
TXT"google-site-verification=RT-Cu9JtQeJC-6MD8CcVYfqvgkAHonLsc-fE8PLtaDU"300
TXT"google-site-verification=YzyQJ1jHnFs3kfNx1icB-Xj3FZ9lIKth70NkU0cHBls"300
TXT"google-site-verification=n2_04aquZcK-28ik9eVHPDIC-2X1yycr1Z71_DVXaCY"300
TXT"google-site-verification=rWVzHOOjU8M3YjXHzhVcLmmVRDc5ZVdDW252BL07WD4"300
TXT"google-site-verification=wz2nibTK2ybsBPecXAkjtTQsKgtnLMPFer6X3y-MEf0"300
TXT"v=spf1 a ip4:54.171.188.117 ip4:54.171.188.119 ip4:192.254.119.131 include:spf.protection.outlook.com include:_spf.mailer.twinfield.com include:_spf.salesforce.com include:spf.mandrillapp.com include:spf.afas.online include:_spf.mailgun.org -all"300

Checks

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