coolblue.nl

Checked 21 October 2026, 21:00 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
3 April 2001
Last changed
11 July 2025
Status
active
Registry nameservers
ns-1371.awsdns-43.org, ns-1580.awsdns-05.co.uk, ns-409.awsdns-51.com, ns-895.awsdns-47.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-1371.awsdns-43.org, ns-1580.awsdns-05.co.uk, ns-409.awsdns-51.com, ns-895.awsdns-47.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns-1371.awsdns-43.org, ns-1580.awsdns-05.co.uk, ns-409.awsdns-51.com, ns-895.awsdns-47.net
NS in the zone
ns-1371.awsdns-43.org, ns-1580.awsdns-05.co.uk, ns-409.awsdns-51.com, ns-895.awsdns-47.net
NameserverAddressesNetwork (AS)Glue
ns-1371.awsdns-43.org205.251.197.91 2600:9000:5305:5b00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1580.awsdns-05.co.uk205.251.198.44 2600:9000:5306:2c00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-409.awsdns-51.com205.251.193.153 2600:9000:5301:9900::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-895.awsdns-47.net205.251.195.127 2600:9000:5303:7f00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1371.awsdns-43.org, ns-1580.awsdns-05.co.uk, ns-409.awsdns-51.com, ns-895.awsdns-47.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-1371.awsdns-43.org 205.251.197.91NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1371.awsdns-43.org 2600:9000:5305:5b00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1580.awsdns-05.co.uk 205.251.198.44NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1580.awsdns-05.co.uk 2600:9000:5306:2c00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-409.awsdns-51.com 205.251.193.153NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-409.awsdns-51.com 2600:9000:5301:9900::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-895.awsdns-47.net 205.251.195.127NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-895.awsdns-47.net 2600:9000:5303:7f00::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-1371.awsdns-43.org

Found

Primary (MNAME)
ns-1371.awsdns-43.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-1371.awsdns-43.org (205.251.197.91)1
ns-1371.awsdns-43.org (2600:9000:5305:5b00::1)1
ns-1580.awsdns-05.co.uk (205.251.198.44)1
ns-1580.awsdns-05.co.uk (2600:9000:5306:2c00::1)1
ns-409.awsdns-51.com (205.251.193.153)1
ns-409.awsdns-51.com (2600:9000:5301:9900::1)1
ns-895.awsdns-47.net (205.251.195.127)1
ns-895.awsdns-47.net (2600:9000:5303:7f00::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-1371.awsdns-43.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

38 records at the apex

Found

Read from
205.251.197.91:53
TypeValueTTL
SOAns-1371.awsdns-43.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1371.awsdns-43.org.172800
NSns-1580.awsdns-05.co.uk.172800
NSns-409.awsdns-51.com.172800
NSns-895.awsdns-47.net.172800
A65.9.130.8760
A65.9.130.7760
A65.9.130.5860
A65.9.130.11860
MX1 aspmx.l.google.com.10800
MX10 alt3.aspmx.l.google.com.10800
MX10 alt4.aspmx.l.google.com.10800
MX5 alt1.aspmx.l.google.com.10800
MX5 alt2.aspmx.l.google.com.10800
TXT"00D0Y0000033sRK=1TBQB0000000253"86400
TXT"MS=ms23628944"86400
TXT"_rtxkmhiw2odsrwf825ekmfze928ewgx"86400
TXT"adobe-idp-site-verification=507f2ed895889e3c969ee2ae036be977278150444fd34c161375b79cd80eea72"86400
TXT"anthropic-domain-verification-pcd5n7=jK5UuZRSRBkBbUq6eSu36iTsl"86400
TXT"apple-domain-verification=y97ohuOPOhYeehe3"86400
TXT"astro-domain-verification=cmnwy67gz6ke301l054w2fqky"86400
TXT"atlassian-domain-verification=UrOCkqD4B5x2wb8JhWswF0syXGrCYziovJGB96I6xWSbPtaYFVpupt9j6Ha07Dts"86400
TXT"docker-verification=80fbcc5d-d737-4ba4-8b1c-8e6ee55c0d39"86400
TXT"docusign=5c2df2a4-a563-4b5d-9e46-d6984769d2fe"86400
TXT"elevenlabs=9XVyW9PQKUEXGYrboFA18xagXdg1VHKWFNoHiTvPMII"86400
TXT"google-site-verification=5vD5lApWzKxPPoQeBGTHm6M3rr1mJRPf_GLM0_2G1pA"86400
TXT"google-site-verification=lpd9tJGxswPYie1aYWuKa4GQ__mWU43IATbECynb4Hw"86400
TXT"jamf-site-verification=6tHeZn0NIfl6QqLyx-XQ8w"86400
TXT"logmein-domain-confirmation=8bmft9oialt1mmoi7kty75a"86400
TXT"mWTfa2Mh60UOoZXXlmrEMUwYJjl4Z2nB"86400
TXT"miro-verification=602a6fefa1d78254ccb98632fba432ce0e8e532d"86400
TXT"openai-domain-verification=dv-2FNNMKnA021GkhloHyP6v4Wz"86400
TXT"openai-domain-verification=dv-3rbktAFXxrAx6Ns4yWcFX9zA"86400
TXT"paloaltonetworks-site-verification=02651f93d95bc644b95210384a5b07c33201d1d8b22efee0e557a1b481425cd7"86400
TXT"parallels-domain-verification=64bb3f08d13343ccaf85188f66f48d544b40525310784954a7c41f8130c8f582"86400
TXT"slack-domain-verification=5Fe1SxuYyAnBGLOia5vnA5C7FTR4OU90gZPlncuQ"86400
TXT"stape-europe-domain-verification-0w2pfm=RdVsQAFT7b6VsbrmIQ7Uo5C2C"86400
TXT"v=spf1 mx include:amazonses.com include:_spf.google.com -all"86400

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