knltb.nl

Checked 22 October 2026, 14:03 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.nl country-code · Registrar.eu

Found

TLD
.nl (country-code)
ICANN policies apply
no
Registrar
Registrar.eu
Registered
25 August 1997
Last changed
24 February 2026
Status
active
Registry nameservers
ns-1509.awsdns-60.org, ns-1741.awsdns-25.co.uk, ns-302.awsdns-37.com, ns-993.awsdns-60.net
RDAP server
https://rdap.sidn.nl/

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
    Expiry date not published
    The registry does not publish the expiry date in RDAP. Check it with your registrar.
    #3
  • i
    No transfer lock
    The domain has no transfer lock (status: active). A registrar lock protects against unauthorized transfers.
    #4
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

ns-1509.awsdns-60.org, ns-1741.awsdns-25.co.uk, ns-302.awsdns-37.com, ns-993.awsdns-60.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns-1509.awsdns-60.org, ns-1741.awsdns-25.co.uk, ns-302.awsdns-37.com, ns-993.awsdns-60.net
NS in the zone
ns-1509.awsdns-60.org, ns-1741.awsdns-25.co.uk, ns-302.awsdns-37.com, ns-993.awsdns-60.net
NameserverAddressesNetwork (AS)Glue
ns-1509.awsdns-60.org205.251.197.229 2600:9000:5305:e500::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1741.awsdns-25.co.uk205.251.198.205 2600:9000:5306:cd00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-302.awsdns-37.com205.251.193.46 2600:9000:5301:2e00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-993.awsdns-60.net205.251.195.225 2600:9000:5303:e100::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1509.awsdns-60.org, ns-1741.awsdns-25.co.uk, ns-302.awsdns-37.com, ns-993.awsdns-60.net.
  • ✓ 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 4 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, Inc., US): 8 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .com, .net, .org, .uk.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-1509.awsdns-60.org 205.251.197.229NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1509.awsdns-60.org 2600:9000:5305:e500::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1741.awsdns-25.co.uk 205.251.198.205NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1741.awsdns-25.co.uk 2600:9000:5306:cd00::1NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns-302.awsdns-37.com 205.251.193.46NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns-302.awsdns-37.com 2600:9000:5301:2e00::1NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns-993.awsdns-60.net 205.251.195.225NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-993.awsdns-60.net 2600:9000:5303:e100::1NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 8 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 1 · primary ns-1509.awsdns-60.org

Found

Primary (MNAME)
ns-1509.awsdns-60.org
Contact (RNAME)
awsdns-hostmaster.amazon.com
Serial
1
Refresh / retry
7200 s / 900 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns-1509.awsdns-60.org (205.251.197.229)1
ns-1509.awsdns-60.org (2600:9000:5305:e500::1)1
ns-1741.awsdns-25.co.uk (205.251.198.205)1
ns-1741.awsdns-25.co.uk (2600:9000:5306:cd00::1)1
ns-302.awsdns-37.com (205.251.193.46)1
ns-302.awsdns-37.com (2600:9000:5301:2e00::1)1
ns-993.awsdns-60.net (205.251.195.225)1
ns-993.awsdns-60.net (2600:9000:5303:e100::1)1

Checks

  • ✓ Serial 1 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 15m, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-1509.awsdns-60.org is one of the listed nameservers.
  • ✓ Contact awsdns-hostmaster@amazon.com #25
    The SOA RNAME awsdns-hostmaster.amazon.com means awsdns-hostmaster@amazon.com.
  • ✓ Counter serial #26
    The serial 1 is a plain counter.

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

warn

15 records at the apex

Found

Read from
205.251.197.229:53
TypeValueTTL
SOAns-1509.awsdns-60.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1509.awsdns-60.org.172800
NSns-1741.awsdns-25.co.uk.172800
NSns-302.awsdns-37.com.172800
NSns-993.awsdns-60.net.172800
A52.59.104.18160
A63.188.110.11860
MX0 knltb-nl.mail.protection.outlook.com.300
TXT"apple-domain-verification=4h9I7ZGThlYSfucq"60
TXT"google-site-verification=IHmrIRKL17j5hiZqf6_ldnUzZ3Qzj1k4IZOAkhvcvMg"60
TXT"google-site-verification=LQdfGWhS0tUrUd_qysNh9aA55piKOfu4Lz7XtkHGpts"60
TXT"google-site-verification=TNkHF2EJLQ3MOTrBTku2YrKerXgjy9sDnyR2Xn3FTHE"60
TXT"google-site-verification=tUOQvQMbOW7CxsxpJwL1Al7t2NbhJKPBxskOCROC0Ks"60
TXT"miro-verification=a45e1402b987bc746517d7ea9b134e9cc3c45f2e h3/6WaXjK/cOHTY8I6kqO8tT8mQKSeWu/qLbu0cCoHttC/25r05h0V8S3hHqnmmfB/HwK+TldTCaYfKNptHT6A=="60
TXT"v=spf1 a ip4:31.161.44.98 ip4:213.125.15.162 ip4:87.251.53.86 ip6:2001:41f0:68da:0:bedb:9ff:feb2:e13 include:spf.protection.outlook.com include:afasonline.nl include:_spf.mailersend.net include:spf.sebsoft.nl ~all"60

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 2d; resolvers may use either.
    #32
  • ✓ 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