knb.nl

Checked 22 October 2026, 14:03 UTC · via 8.8.8.8
iAll checks passed
30 passed 0 warnings 0 failed 5 info

Registration

info

.nl country-code · Gandi

Found

TLD
.nl (country-code)
ICANN policies apply
no
Registrar
Gandi
Registered
20 November 1997
Last changed
13 March 2025
Status
active
Registry nameservers
ns-1450.awsdns-53.org, ns-1603.awsdns-08.co.uk, ns-377.awsdns-47.com, ns-839.awsdns-40.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-1450.awsdns-53.org, ns-1603.awsdns-08.co.uk, ns-377.awsdns-47.com, ns-839.awsdns-40.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns-1450.awsdns-53.org, ns-1603.awsdns-08.co.uk, ns-377.awsdns-47.com, ns-839.awsdns-40.net
NS in the zone
ns-1450.awsdns-53.org, ns-1603.awsdns-08.co.uk, ns-377.awsdns-47.com, ns-839.awsdns-40.net
NameserverAddressesNetwork (AS)Glue
ns-1450.awsdns-53.org205.251.197.170 2600:9000:5305:aa00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1603.awsdns-08.co.uk205.251.198.67 2600:9000:5306:4300::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-377.awsdns-47.com205.251.193.121 2600:9000:5301:7900::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-839.awsdns-40.net205.251.195.71 2600:9000:5303:4700::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1450.awsdns-53.org, ns-1603.awsdns-08.co.uk, ns-377.awsdns-47.com, ns-839.awsdns-40.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-1450.awsdns-53.org 205.251.197.170NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1450.awsdns-53.org 2600:9000:5305:aa00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1603.awsdns-08.co.uk 205.251.198.67NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1603.awsdns-08.co.uk 2600:9000:5306:4300::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-377.awsdns-47.com 205.251.193.121NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-377.awsdns-47.com 2600:9000:5301:7900::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-839.awsdns-40.net 205.251.195.71NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-839.awsdns-40.net 2600:9000:5303:4700::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-377.awsdns-47.com

Found

Primary (MNAME)
ns-377.awsdns-47.com
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-1450.awsdns-53.org (205.251.197.170)1
ns-1450.awsdns-53.org (2600:9000:5305:aa00::1)1
ns-1603.awsdns-08.co.uk (205.251.198.67)1
ns-1603.awsdns-08.co.uk (2600:9000:5306:4300::1)1
ns-377.awsdns-47.com (205.251.193.121)1
ns-377.awsdns-47.com (2600:9000:5301:7900::1)1
ns-839.awsdns-40.net (205.251.195.71)1
ns-839.awsdns-40.net (2600:9000:5303:4700::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-377.awsdns-47.com 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

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
16401ECDSAP256SHA256 (13)SHA256 03417B0D03BC7243…yes

DNSKEY in the zone

Key tagRoleAlgorithm
48260ZSK (256)ECDSAP256SHA256 (13)
34797ZSK (256)ECDSAP256SHA256 (13)
16401KSK (257)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 16401 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 2h0m0s and created on demand; the current one was made at 2026-10-22 13:03 UTC and expires at 2026-10-22 15:18 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

pass

30 records at the apex

Found

Read from
205.251.197.170:53
TypeValueTTL
SOAns-377.awsdns-47.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1450.awsdns-53.org.172800
NSns-1603.awsdns-08.co.uk.172800
NSns-377.awsdns-47.com.172800
NSns-839.awsdns-40.net.172800
A185.38.232.233300
AAAA2a02:720:9:8::233300
MX0 knb-nl.mail.protection.outlook.com.21600
TXT"053qg97p7vbpjkbmpqqk2fd26kjvd40v"21600
TXT"10t72xszf11982s0yrwwpttcnyywdnth"21600
TXT"2qrrkj6685mhmc6dcmnk8z57qzw7pbm4"21600
TXT"442985y65c0t4dw1vp04c30smtnnqbf0"21600
TXT"4sx5hy9j9p1nx67c916qgclk9lt0n2r5"21600
TXT"5011zp5j75dfx8ksj14k7ffrqbdwgz81"21600
TXT"MS=ms40087332"21600
TXT"amazonses:m93T8J/l3+BhyBY1WT6KsLtEU13a+uJpNqF18GXZjro="21600
TXT"apple-domain-verification=6FzWf3DODu770cM7"21600
TXT"atlassian-domain-verification=tYFIyn7lQJuXakBGnb8/v9aCeGhvbNnVs4clNjbjMhyYCvFv0H577j8xg1q7CN8H"21600
TXT"cd4mdv72w6xyv4cw73x0ghn12y9cpt4k"21600
TXT"dczjlwk1xqyqlfzwpbzk2m3ygbb6pr6x"21600
TXT"dqr8s1wh9kktg8wkk5blyfn7ht9q7dd6"21600
TXT"g0xt4lrlv8pllx883p2yxsvg8408m9ld"21600
TXT"meDupeHbTlU80gkemVBnjFJb2etulgd9d0IezgfQI5KxYBdSsyYWG7zmRRbLt4nHzSYJklxBbmuXE7U41amEBQ=="21600
TXT"pq53x94m3wsdvxfr39p6695q2h58p0f0"21600
TXT"v=spf1 include:_spf.exactonline.nl include:spf.mailjet.com ip4:212.178.133.230 ip4:141.255.179.47 ip4:46.226.60.151 include:spf.pe-online.org include:spf.protection.outlook.com include:_spf.iprox.nl -all"21600
CAA0 issue "KPN.COM"21600
CAA0 issue "comodoca.com"21600
CAA0 issue "digicert.com"21600
CAA0 issue "letsencrypt.org"21600
CAA0 issue "sectigo.com"21600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 6h, NS 2d. The NS TTL at the parent is 1h and in the zone 2d; 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: KPN.COM, comodoca.com, digicert.com, letsencrypt.org, sectigo.com.