538.nl

Checked 21 October 2026, 20:45 UTC · via 8.8.8.8
!Passed with warnings
23 passed 2 warnings 0 failed 4 info

Registration

info

.nl country-code

Found

TLD
.nl (country-code)
ICANN policies apply
no
Lookup error: https://rdap.sidn.nl/domain/538.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/538.nl returned HTTP 429
    #3

Delegation

info

ns-1044.awsdns-02.org, ns-1839.awsdns-37.co.uk, ns-50.awsdns-06.com, ns-790.awsdns-34.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns-1044.awsdns-02.org, ns-1839.awsdns-37.co.uk, ns-50.awsdns-06.com, ns-790.awsdns-34.net
NS in the zone
ns-1044.awsdns-02.org, ns-1839.awsdns-37.co.uk, ns-50.awsdns-06.com, ns-790.awsdns-34.net
NameserverAddressesNetwork (AS)Glue
ns-1044.awsdns-02.org205.251.196.20 2600:9000:5304:1400::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1839.awsdns-37.co.uk205.251.199.47 2600:9000:5307:2f00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-50.awsdns-06.com205.251.192.50 2600:9000:5300:3200::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-790.awsdns-34.net205.251.195.22 2600:9000:5303:1600::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1044.awsdns-02.org, ns-1839.awsdns-37.co.uk, ns-50.awsdns-06.com, ns-790.awsdns-34.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-1044.awsdns-02.org 205.251.196.20NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1044.awsdns-02.org 2600:9000:5304:1400::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1839.awsdns-37.co.uk 205.251.199.47NOERROR, 15 ms, authoritativenoyes / yesrefused-
ns-1839.awsdns-37.co.uk 2600:9000:5307:2f00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-50.awsdns-06.com 205.251.192.50NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-50.awsdns-06.com 2600:9000:5300:3200::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-790.awsdns-34.net 205.251.195.22NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-790.awsdns-34.net 2600:9000:5303:1600::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-1044.awsdns-02.org

Found

Primary (MNAME)
ns-1044.awsdns-02.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-1044.awsdns-02.org (205.251.196.20)1
ns-1044.awsdns-02.org (2600:9000:5304:1400::1)1
ns-1839.awsdns-37.co.uk (205.251.199.47)1
ns-1839.awsdns-37.co.uk (2600:9000:5307:2f00::1)1
ns-50.awsdns-06.com (205.251.192.50)1
ns-50.awsdns-06.com (2600:9000:5300:3200::1)1
ns-790.awsdns-34.net (205.251.195.22)1
ns-790.awsdns-34.net (2600:9000:5303:1600::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-1044.awsdns-02.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

29 records at the apex

Found

Read from
205.251.196.20:53
TypeValueTTL
SOAns-1044.awsdns-02.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1044.awsdns-02.org.172800
NSns-1839.awsdns-37.co.uk.172800
NSns-50.awsdns-06.com.172800
NSns-790.awsdns-34.net.172800
A18.245.86.9260
A18.245.86.6860
A18.245.86.5860
A18.245.86.7960
AAAA2600:9000:2644:d800:1c:423b:a240:93a160
AAAA2600:9000:2644:1200:1c:423b:a240:93a160
AAAA2600:9000:2644:4600:1c:423b:a240:93a160
AAAA2600:9000:2644:fe00:1c:423b:a240:93a160
AAAA2600:9000:2644:6200:1c:423b:a240:93a160
AAAA2600:9000:2644:a400:1c:423b:a240:93a160
AAAA2600:9000:2644:3800:1c:423b:a240:93a160
AAAA2600:9000:2644:d400:1c:423b:a240:93a160
MX10 mxa-004ed801.gslb.pphosted.com.300
MX10 mxb-004ed801.gslb.pphosted.com.300
TXT"MS=ms69588532"300
TXT"atlassian-domain-verification=5VSTPO8N3VbwyA1rG5th1Ug35qOYQnZuhg1h4tF89rRPz8w/5BIt8iiE1eVYSU/0"300
TXT"bw=93ftfYM3VWhdT/dZWHQzQ1vm0jlnkYlrLAZHffFDK73t"300
TXT"ehokff2zon49pkri07p8m2rufjixssfbg4clmhhhkzhbe/y/lwzmosndf7unloap+vh1z8kgrtszq6wdivzvaq=="300
TXT"elevenlabs=8F30XYmMajh6qGFRLWZ-lBmzPQcNltdQoS13_eYHkGk"300
TXT"facebook-domain-verification=psz1xjm4pynhc2mkcqyufuij51zv7x"300
TXT"google-site-verification=hXn1SG_SCmOL6pLgyAux-9CXwOI70r3HzcCzmr6PV0Q"300
TXT"knowbe4-site-verification=30c3a242379a3f2de86e9a66555ec09c"300
TXT"openai-domain-verification=dv-mqAAT8HfRm3wgxFDhfstOUbq"300
TXT"v=spf1 ip4:185.132.183.72 ip4:185.183.30.130 include:spf.protection.outlook.com include:amazonses.com include:sendgrid.net include:mailgun.org -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