nationalgeographic.nl

Checked 21 October 2026, 21:23 UTC · via 8.8.8.8
!Passed with warnings
24 passed 1 warning 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/nationalgeographic.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/nationalgeographic.nl returned HTTP 429
    #3

Delegation

info

ns112.twdcns.co.uk, ns112.twdcns.com, ns112.twdcns.net, ns112.twdcns.org

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns112.twdcns.co.uk, ns112.twdcns.com, ns112.twdcns.net, ns112.twdcns.org
NS in the zone
ns112.twdcns.co.uk, ns112.twdcns.com, ns112.twdcns.net, ns112.twdcns.org
NameserverAddressesNetwork (AS)Glue
ns112.twdcns.co.uk205.251.199.56 2600:9000:5307:3800::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns112.twdcns.com205.251.192.163 2600:9000:5300:a300::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns112.twdcns.net205.251.194.147 2600:9000:5302:9300::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns112.twdcns.org205.251.196.47 2600:9000:5304:2f00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns112.twdcns.co.uk, ns112.twdcns.com, ns112.twdcns.net, ns112.twdcns.org.
  • ✓ 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
ns112.twdcns.co.uk 205.251.199.56NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns112.twdcns.co.uk 2600:9000:5307:3800::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns112.twdcns.com 205.251.192.163NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns112.twdcns.com 2600:9000:5300:a300::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns112.twdcns.net 205.251.194.147NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns112.twdcns.net 2600:9000:5302:9300::1NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns112.twdcns.org 205.251.196.47NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns112.twdcns.org 2600:9000:5304:2f00::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 ns112.twdcns.org

Found

Primary (MNAME)
ns112.twdcns.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
ns112.twdcns.co.uk (205.251.199.56)1
ns112.twdcns.co.uk (2600:9000:5307:3800::1)1
ns112.twdcns.com (205.251.192.163)1
ns112.twdcns.com (2600:9000:5300:a300::1)1
ns112.twdcns.net (205.251.194.147)1
ns112.twdcns.net (2600:9000:5302:9300::1)1
ns112.twdcns.org (205.251.196.47)1
ns112.twdcns.org (2600:9000:5304:2f00::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 ns112.twdcns.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

info

20 records at the apex

Found

Read from
205.251.199.56:53
TypeValueTTL
SOAns112.twdcns.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400600
NSns112.twdcns.co.uk.86400
NSns112.twdcns.com.86400
NSns112.twdcns.net.86400
NSns112.twdcns.org.86400
A151.101.64.155300
A151.101.128.155300
A151.101.0.155300
A151.101.192.155300
MX0 nationalgeographic-nl.mail.protection.outlook.com.3600
TXT"BSI91896679786"3600
TXT"MS=ms77975355"3600
TXT"facebook-domain-verification=2ztb2e2skigzi4dtneklsv737uajks"3600
TXT"google-site-verification=2_ywRFvyDUiSNqSr1-Xvj4U-FyDYox3NANJtznQwvJA"3600
TXT"google-site-verification=3eJPuUccGUTPvTELFIX0HfY0O3AMnZVyTTzeHN0wgDc"3600
TXT"google-site-verification=7oe-mFpdOZ1dG3k6BKeEoF46ZkGhLXLHVOI-28_-iSI"3600
TXT"google-site-verification=O1rk3lxpYsHzly7grFGWEkT5wqs8xYsHohIqBlqe-RI"3600
TXT"l983tc53db541ynqx22nrrnpyms6gq0j"3600
TXT"mpvdr2p2y5hp2s9xsjfl9y275xtjrkll"3600
TXT"v=spf1 include:servers.mcsv.net include:spf.protection.outlook.com -all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 1h, NS 1d. The NS TTL at the parent is 1h and in the zone 1d; 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.
  • 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