kwf.nl

Checked 21 October 2026, 21:22 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/kwf.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/kwf.nl returned HTTP 429
    #3

Delegation

info

holly.ns.cloudflare.com, trevor.ns.cloudflare.com

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
holly.ns.cloudflare.com, trevor.ns.cloudflare.com
NS in the zone
holly.ns.cloudflare.com, trevor.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
holly.ns.cloudflare.com108.162.194.133 162.159.38.133 172.64.34.133 2a06:98c1:50::ac40:2285 2606:4700:50::a29f:2685 2803:f800:50::6ca2:c285AS13335 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-
trevor.ns.cloudflare.com172.64.35.154 108.162.195.154 162.159.44.154 2a06:98c1:50::ac40:239a 2803:f800:50::6ca2:c39a 2606:4700:58::a29f:2c9aAS13335 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: holly.ns.cloudflare.com, trevor.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
holly.ns.cloudflare.com 108.162.194.133NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
holly.ns.cloudflare.com 162.159.38.133NOERROR, 31 ms, authoritativenoyes / yesrefused2026.10.2
holly.ns.cloudflare.com 172.64.34.133NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
holly.ns.cloudflare.com 2a06:98c1:50::ac40:2285NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
holly.ns.cloudflare.com 2606:4700:50::a29f:2685NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
holly.ns.cloudflare.com 2803:f800:50::6ca2:c285NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
trevor.ns.cloudflare.com 172.64.35.154NOERROR, 18 ms, authoritativenoyes / yesrefused2026.10.2
trevor.ns.cloudflare.com 108.162.195.154NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
trevor.ns.cloudflare.com 162.159.44.154NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
trevor.ns.cloudflare.com 2a06:98c1:50::ac40:239aNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
trevor.ns.cloudflare.com 2803:f800:50::6ca2:c39aNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
trevor.ns.cloudflare.com 2606:4700:58::a29f:2c9aNOERROR, 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: holly.ns.cloudflare.com: "2026.10.2"; trevor.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 2418082014 · primary holly.ns.cloudflare.com

Found

Primary (MNAME)
holly.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2418082014
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
holly.ns.cloudflare.com (108.162.194.133)2418082014
holly.ns.cloudflare.com (162.159.38.133)2418082014
holly.ns.cloudflare.com (172.64.34.133)2418082014
holly.ns.cloudflare.com (2a06:98c1:50::ac40:2285)2418082014
holly.ns.cloudflare.com (2606:4700:50::a29f:2685)2418082014
holly.ns.cloudflare.com (2803:f800:50::6ca2:c285)2418082014
trevor.ns.cloudflare.com (172.64.35.154)2418082014
trevor.ns.cloudflare.com (108.162.195.154)2418082014
trevor.ns.cloudflare.com (162.159.44.154)2418082014
trevor.ns.cloudflare.com (2a06:98c1:50::ac40:239a)2418082014
trevor.ns.cloudflare.com (2803:f800:50::6ca2:c39a)2418082014
trevor.ns.cloudflare.com (2606:4700:58::a29f:2c9a)2418082014

Checks

  • ✓ Serial 2418082014 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 holly.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 2418082014 is a Unix timestamp (2046-08-17 01:26 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

pass

35 records at the apex

Found

Read from
108.162.194.133:53
TypeValueTTL
SOAholly.ns.cloudflare.com. dns.cloudflare.com. 2418082014 10000 2400 604800 18001800
NSholly.ns.cloudflare.com.86400
NStrevor.ns.cloudflare.com.86400
A172.66.170.144300
A104.20.28.138300
AAAA2606:4700:10::6814:1c8a300
AAAA2606:4700:10::ac42:aa90300
MX10 kwf-nl.mail.protection.outlook.com.300
TXT"1WGP6dzj6NnQIPF7spQkeCmGu53Yqwb4Tv3zdG8xyDiBT7SDoufzMqzCjKZyr3tuYRurLCXsdMpVhT+QMyOtjQ=="60
TXT"apple-domain-verification=ERFz0hHX1f5QsMGu"60
TXT"atlassian-domain-verification=EKaD247iKAwKDM372S4mbdCzHKwp9yDiBJQcABg3CFq2e5O/nxYn1cDSBfeD343t"60
TXT"atlassian-sending-domain-verification=c5b30703-dfce-4db9-ac6b-010e22a992db"60
TXT"fireflies-verification=01JR8153WCSA6JY03WJMT2ST0C.ffverify.fireflies.ai-request-verification=2025-04-07T11:46:14Z"60
TXT"google-site-verification=QbbA3LyL3vLtwAnG7IcAH6LWZu7WUa5-EUbmfxaoDvs"60
TXT"google-site-verification=RfLNjh8r-7FbU0C4XczYqeBO4X8tyiMpw4K2NIy5pyU"60
TXT"google-site-verification=_VUZg5jdEkHJCuI3EbC0NYZ94LjbO_9s-hfhC30Zogc"60
TXT"google-site-verification=aiwigX9tIGzg0BiGL0chNtC_VpnEU7ZOSs7L9Pk3P5E"60
TXT"google-site-verification=vMorLYqJblsU20sSqQgZDJ4MUD50N4ir4OvwqUigV10"60
TXT"google-site-verification=zUgzFMVaeN3ql6ykvSCrb8RmLdR47BSEa_NkNlTAf3c"60
TXT"mandrill_verify.yr7O8H6EVOCoY7l8RRfLzQ"60
TXT"openai-domain-verification=dv-GVxxefLKhDR36iQbzeXWoEqx"60
TXT"v=spf1 ip4:185.111.120.38 ip4:46.51.177.14 ip4:18.196.170.12 include:spf.protection.outlook.com include:_spf.salesforce.com include:spf.exclaimer.net include:spf.steam-connect.com include:_spf.formulierenserver.nl -all"60
CAA0 iodef "mailto:webmaster@kwf.nl"300
CAA0 issue "amazon.com"300
CAA0 issue "comodoca.com"300
CAA0 issue "digicert.com; cansignhttpexchanges=yes"300
CAA0 issue "letsencrypt.org"300
CAA0 issue "pki.goog; cansignhttpexchanges=yes"300
CAA0 issue "sectigo.com"300
CAA0 issue "ssl.com"300
CAA0 issuewild "comodoca.com"300
CAA0 issuewild "digicert.com; cansignhttpexchanges=yes"300
CAA0 issuewild "letsencrypt.org"300
CAA0 issuewild "pki.goog; cansignhttpexchanges=yes"300
CAA0 issuewild "ssl.com"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.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: amazon.com, comodoca.com, digicert.com, letsencrypt.org, pki.goog, sectigo.com, ssl.com.