nkc.nl

Checked 22 October 2026, 14:42 UTC · via 8.8.8.8
!Passed with warnings
21 passed 2 warnings 0 failed 6 info

Registration

info

.nl country-code

Found

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

Delegation

info

dean.ns.cloudflare.com, sydney.ns.cloudflare.com

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
dean.ns.cloudflare.com, sydney.ns.cloudflare.com
NS in the zone
dean.ns.cloudflare.com, sydney.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
dean.ns.cloudflare.com108.162.193.153 173.245.59.153 172.64.33.153 2606:4700:58::adf5:3b99 2803:f800:50::6ca2:c199 2a06:98c1:50::ac40:2199AS13335 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-
sydney.ns.cloudflare.com172.64.34.102 162.159.38.102 108.162.194.102 2a06:98c1:50::ac40:2266 2803:f800:50::6ca2:c266 2606:4700:50::a29f:2666AS13335 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: dean.ns.cloudflare.com, sydney.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
dean.ns.cloudflare.com 108.162.193.153NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
dean.ns.cloudflare.com 173.245.59.153NOERROR, 23 ms, authoritativenoyes / yesrefused2026.10.2
dean.ns.cloudflare.com 172.64.33.153NOERROR, 28 ms, authoritativenoyes / yesrefused2026.10.2
dean.ns.cloudflare.com 2606:4700:58::adf5:3b99NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
dean.ns.cloudflare.com 2803:f800:50::6ca2:c199NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
dean.ns.cloudflare.com 2a06:98c1:50::ac40:2199NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
sydney.ns.cloudflare.com 172.64.34.102NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
sydney.ns.cloudflare.com 162.159.38.102NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
sydney.ns.cloudflare.com 108.162.194.102NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
sydney.ns.cloudflare.com 2a06:98c1:50::ac40:2266NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
sydney.ns.cloudflare.com 2803:f800:50::6ca2:c266NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
sydney.ns.cloudflare.com 2606:4700:50::a29f:2666NOERROR, 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: dean.ns.cloudflare.com: "2026.10.2"; sydney.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 2417985571 · primary dean.ns.cloudflare.com

Found

Primary (MNAME)
dean.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417985571
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
dean.ns.cloudflare.com (108.162.193.153)2417985571
dean.ns.cloudflare.com (173.245.59.153)2417985571
dean.ns.cloudflare.com (172.64.33.153)2417985571
dean.ns.cloudflare.com (2606:4700:58::adf5:3b99)2417985571
dean.ns.cloudflare.com (2803:f800:50::6ca2:c199)2417985571
dean.ns.cloudflare.com (2a06:98c1:50::ac40:2199)2417985571
sydney.ns.cloudflare.com (172.64.34.102)2417985571
sydney.ns.cloudflare.com (162.159.38.102)2417985571
sydney.ns.cloudflare.com (108.162.194.102)2417985571
sydney.ns.cloudflare.com (2a06:98c1:50::ac40:2266)2417985571
sydney.ns.cloudflare.com (2803:f800:50::6ca2:c266)2417985571
sydney.ns.cloudflare.com (2606:4700:50::a29f:2666)2417985571

Checks

  • ✓ Serial 2417985571 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 dean.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 2417985571 is a Unix timestamp (2046-08-15 22:39 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

info

27 records at the apex

Found

Read from
108.162.193.153:53
TypeValueTTL
SOAdean.ns.cloudflare.com. dns.cloudflare.com. 2417985571 10000 2400 604800 18001800
NSdean.ns.cloudflare.com.86400
NSsydney.ns.cloudflare.com.86400
A104.26.2.208300
A104.26.3.208300
A172.67.73.62300
AAAA2606:4700:20::681a:2d0300
AAAA2606:4700:20::ac43:493e300
AAAA2606:4700:20::681a:3d0300
MX0 nkc-nl.mail.protection.outlook.com.300
TXT"_3i9n5sft51saepmmxhhnux1ucl3969b"300
TXT"_globalsign-domain-verification=0ECLGumyGLbPuGn5kS0uw2hW3gsFAhVNwtzGtB2F_a"300
TXT"_globalsign-domain-verification=7Yae_Dll3Xrstkf3j1cmk66Bwv4FUIdFnJ3wAggInM"300
TXT"_globalsign-domain-verification=9P2FNZHmI3N1ePWr0iE1SvVD7sUZLQNA-sRAyzh24l"300
TXT"_globalsign-domain-verification=J0fqUYhH5CzI_S2mx3EpZQ1k5_39HeRK1u02-CRr00"300
TXT"_globalsign-domain-verification=LTnpCBvA7JYTWnUHLOqm8uBuFtZPYPJf517mrZedhq"300
TXT"_globalsign-domain-verification=UGY9LhBz4BQwQXE4SmbVSdq45P40IuxqseEpurTY25"300
TXT"_globalsign-domain-verification=VCVP4j1ls9DlH7QtEZd5G4TevnebbaJT9tB1gzyMDS"300
TXT"_globalsign-domain-verification=ers7kG5ekGHcyJV9T5mlb5R_WXSt9PWJ_1Ck9aNf_b"300
TXT"_globalsign-domain-verification=fHNnNP-802SHzUSMOcvePIW0MzGlfuoPiIrek_scKp"300
TXT"_p6dqr6rdax1kxmatjqt1payd5vwxg8h"300
TXT"amazonses:8ex9dFbS0NR9cMkvHDpo+VNPLQMfNSbATFN0JqMSWgE="300
TXT"asv=eaee90e4d1b0cee552146283e6703181"300
TXT"google-site-verification=8uae40PRa8NWGzSByM-tsGwIaOlRBaoEhtBS3aNiyYg"300
TXT"google-site-verification=R02ocYTc7OfR9vXoWWfxwycSmU1IWwB_C7U_2U2fG3w"300
TXT"pinterest-site-verification=9360b84f9e0a9fb1ae8546d82bff0d7d"300
TXT"v=spf1 a mx ip4:46.31.48.0/21 include:spf.protection.outlook.com ip6:2a01:111:f400::/48 ip6:2a01:111:f403::/48 ip4:40.92.0.0/15 ip4:40.107.0.0/16 ip4:52.100.0.0/14 ip4:104.47.0.0/17 ip4:194.109.148.128/26 ip4:90.145.27.170 ip4:87.249.123.155 ip4:50.31.63" ".44 ip4:205.201.128.0/20 ip4:205.201.128.0/20 ip4:198.2.128.0/18 include:spf.mandrillapp.com include:sendgrid.net include:fdspfeuc.freshemail.io ip4:185.136.64.128/27 ip4:185.136.65.128/27 ip4:199.255.192.0/22 ip4:199.127.232.0/22 ip4:54.240.0.0/18 ip4:69" ".169.224.0/20 ip4:23.249.208.0/20 ip4:23.251.224.0/19 ip4:76.223.176.0/20 ip4:54.240.64.0/19 ip4:54.240.96.0/19 ip4:52.82.172.0/22 include:spf.aon.net include:spf.mailjet.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