hartvannederland.nl

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

Registration

info

.nl country-code · Registrar.eu

Found

TLD
.nl (country-code)
ICANN policies apply
no
Registrar
Registrar.eu
Registered
29 September 1999
Last changed
4 July 2025
Status
active
Registry nameservers
ns-1357.awsdns-41.org, ns-1599.awsdns-07.co.uk, ns-61.awsdns-07.com, ns-736.awsdns-28.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-1357.awsdns-41.org, ns-1599.awsdns-07.co.uk, ns-61.awsdns-07.com, ns-736.awsdns-28.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns-1357.awsdns-41.org, ns-1599.awsdns-07.co.uk, ns-61.awsdns-07.com, ns-736.awsdns-28.net
NS in the zone
ns-1357.awsdns-41.org, ns-1599.awsdns-07.co.uk, ns-61.awsdns-07.com, ns-736.awsdns-28.net
NameserverAddressesNetwork (AS)Glue
ns-1357.awsdns-41.org(does not resolve)-
ns-1599.awsdns-07.co.uk205.251.198.63 2600:9000:5306:3f00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-61.awsdns-07.com205.251.192.61 2600:9000:5300:3d00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 -
ns-736.awsdns-28.net205.251.194.224 2600:9000:5302:e000::1- AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1357.awsdns-41.org, ns-1599.awsdns-07.co.uk, ns-61.awsdns-07.com, ns-736.awsdns-28.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.
  • i
    Could not be checked
    Resolving these nameserver names failed: ns-1357.awsdns-41.org (DNS query for ns-1357.awsdns-41.org failed: read udp 46.225.38.91:53851->8.8.8.8:53: i/o timeout).
    #9
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 3 IPv4 /24s and 3 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, Inc., US): 5 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

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-1599.awsdns-07.co.uk 205.251.198.63NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1599.awsdns-07.co.uk 2600:9000:5306:3f00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-61.awsdns-07.com 205.251.192.61NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-61.awsdns-07.com 2600:9000:5300:3d00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-736.awsdns-28.net 205.251.194.224NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-736.awsdns-28.net 2600:9000:5302:e000::1NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 6 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-1599.awsdns-07.co.uk

Found

Primary (MNAME)
ns-1599.awsdns-07.co.uk
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-1599.awsdns-07.co.uk (205.251.198.63)1
ns-1599.awsdns-07.co.uk (2600:9000:5306:3f00::1)1
ns-61.awsdns-07.com (205.251.192.61)1
ns-61.awsdns-07.com (2600:9000:5300:3d00::1)1
ns-736.awsdns-28.net (205.251.194.224)1
ns-736.awsdns-28.net (2600:9000:5302:e000::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-1599.awsdns-07.co.uk 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

22 records at the apex

Found

Read from
205.251.198.63:53
TypeValueTTL
SOAns-1599.awsdns-07.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1357.awsdns-41.org.172800
NSns-1599.awsdns-07.co.uk.172800
NSns-61.awsdns-07.com.172800
NSns-736.awsdns-28.net.172800
A52.222.214.3860
A52.222.214.2660
A52.222.214.4560
A52.222.214.4860
AAAA2600:9000:223d:1000:1:334c:e1c0:93a160
AAAA2600:9000:223d:c800:1:334c:e1c0:93a160
AAAA2600:9000:223d:ac00:1:334c:e1c0:93a160
AAAA2600:9000:223d:fc00:1:334c:e1c0:93a160
AAAA2600:9000:223d:c200:1:334c:e1c0:93a160
AAAA2600:9000:223d:ec00:1:334c:e1c0:93a160
AAAA2600:9000:223d:c00:1:334c:e1c0:93a160
AAAA2600:9000:223d:400:1:334c:e1c0:93a160
MX10 mxa-004ed801.gslb.pphosted.com.300
MX10 mxb-004ed801.gslb.pphosted.com.300
TXT"MS=ms10313521"300
TXT"google-site-verification=xHrjXyxgF_inUkgN8jk62m5jmSQxOcknu3P5X9hO0EQ"300
TXT"v=spf1 include:spf-004ed801.pphosted.com include:spf.protection.outlook.com -all"300

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), AAAA (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