knvvl.nl

Checked 22 October 2026, 14:03 UTC · via 8.8.8.8
!Passed with warnings
25 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/knvvl.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/knvvl.nl returned HTTP 429
    #3

Delegation

info

coleman.ns.cloudflare.com, coraline.ns.cloudflare.com

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
coleman.ns.cloudflare.com, coraline.ns.cloudflare.com
NS in the zone
coleman.ns.cloudflare.com, coraline.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
coleman.ns.cloudflare.com108.162.195.64 172.64.35.64 162.159.44.64 2a06:98c1:50::ac40:2340 2803:f800:50::6ca2:c340 2606:4700:58::a29f:2c40AS13335 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-
coraline.ns.cloudflare.com162.159.38.88 108.162.194.88 172.64.34.88 2606:4700:50::a29f:2658 2803:f800:50::6ca2:c258 2a06:98c1:50::ac40:2258AS13335 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: coleman.ns.cloudflare.com, coraline.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
coleman.ns.cloudflare.com 108.162.195.64NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
coleman.ns.cloudflare.com 172.64.35.64NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
coleman.ns.cloudflare.com 162.159.44.64NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
coleman.ns.cloudflare.com 2a06:98c1:50::ac40:2340NOERROR, 18 ms, authoritativenoyes / yesrefused2026.10.2
coleman.ns.cloudflare.com 2803:f800:50::6ca2:c340NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
coleman.ns.cloudflare.com 2606:4700:58::a29f:2c40NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
coraline.ns.cloudflare.com 162.159.38.88NOERROR, 34 ms, authoritativenoyes / yesrefused2026.10.2
coraline.ns.cloudflare.com 108.162.194.88NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
coraline.ns.cloudflare.com 172.64.34.88NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
coraline.ns.cloudflare.com 2606:4700:50::a29f:2658NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
coraline.ns.cloudflare.com 2803:f800:50::6ca2:c258NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
coraline.ns.cloudflare.com 2a06:98c1:50::ac40:2258NOERROR, 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: coleman.ns.cloudflare.com: "2026.10.2"; coraline.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 2418096699 · primary coleman.ns.cloudflare.com

Found

Primary (MNAME)
coleman.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2418096699
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
coleman.ns.cloudflare.com (108.162.195.64)2418096699
coleman.ns.cloudflare.com (172.64.35.64)2418096699
coleman.ns.cloudflare.com (162.159.44.64)2418096699
coleman.ns.cloudflare.com (2a06:98c1:50::ac40:2340)2418096699
coleman.ns.cloudflare.com (2803:f800:50::6ca2:c340)2418096699
coleman.ns.cloudflare.com (2606:4700:58::a29f:2c40)2418096699
coraline.ns.cloudflare.com (162.159.38.88)2418096699
coraline.ns.cloudflare.com (108.162.194.88)2418096699
coraline.ns.cloudflare.com (172.64.34.88)2418096699
coraline.ns.cloudflare.com (2606:4700:50::a29f:2658)2418096699
coraline.ns.cloudflare.com (2803:f800:50::6ca2:c258)2418096699
coraline.ns.cloudflare.com (2a06:98c1:50::ac40:2258)2418096699

Checks

  • ✓ Serial 2418096699 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 coleman.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 2418096699 is a Unix timestamp (2046-08-17 05:31 UTC).

DNSSEC

info

Signed, DS published at parent

Found

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

DS at the parent

Key tagAlgorithmDigestMatches a key
2371ECDSAP256SHA256 (13)SHA256 502D77DF7CF699B3…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 13:03 UTC and expires at 2026-10-23 15:03 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

13 records at the apex

Found

Read from
108.162.195.64:53
TypeValueTTL
SOAcoleman.ns.cloudflare.com. dns.cloudflare.com. 2418096699 10000 2400 604800 18001800
NScoleman.ns.cloudflare.com.86400
NScoraline.ns.cloudflare.com.86400
A104.21.46.48300
A172.67.223.162300
AAAA2606:4700:3033::ac43:dfa2300
AAAA2606:4700:3030::6815:2e30300
MX1 smtp.google.com.300
TXT"MS=ms89023090"300
TXT"brevo-code:86aafc01611f715a949d3baebea5f79a"300
TXT"google-site-verification=hPxbPdNU-kVrP57YmxAZBDDpKQcVbEvOoIWpyFgpKKU"300
TXT"google-site-verification=rL6FWA6PoPpeaeZ_shej5uy5uUeodJGv2S6pwGXlLkY"300
TXT"v=spf1 include:spf.brevo.com include:spf.zoho.eu include:eu.transmail.net include:spf.zohomail360.eu include:_spf.google.com include:amazonses.com ~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.
  • ✓ 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