literatuurmuseum.nl

Checked 22 October 2026, 14:11 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 3 info

Registration

info

.nl country-code

Found

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

Delegation

pass

ns01.secureonline.nl, ns02.secureonline.nl, ns03.secureonline.cloud

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns01.secureonline.nl, ns02.secureonline.nl, ns03.secureonline.cloud
NS in the zone
ns01.secureonline.nl, ns02.secureonline.nl, ns03.secureonline.cloud
NameserverAddressesNetwork (AS)Glue
ns01.secureonline.nl89.207.128.251 2a00:7b80:476:ffff::2AS62370 Snel - Snel.com B.V., NL AS62370 Snel - Snel.com B.V., NL-
ns02.secureonline.nl89.207.130.251 2a00:7b80:478:ffff::2AS62370 Snel - Snel.com B.V., NL AS62370 Snel - Snel.com B.V., NL-
ns03.secureonline.cloud77.72.147.249 2a01:7c8:aaae:1e2::2AS20857 TRANSIP-AS - Signet B.V., NL AS20857 TRANSIP-AS - Signet B.V., NL-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns01.secureonline.nl, ns02.secureonline.nl, ns03.secureonline.cloud.
  • ✓ 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 3 IPv4 /24s and 3 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20857 (TRANSIP-AS - Signet B.V., NL): 2 addresses; AS62370 (Snel - Snel.com B.V., NL): 4 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .cloud, .nl.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns01.secureonline.nl 89.207.128.251NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns01.secureonline.nl 2a00:7b80:476:ffff::2NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns02.secureonline.nl 89.207.130.251NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns02.secureonline.nl 2a00:7b80:478:ffff::2NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns03.secureonline.cloud 77.72.147.249NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns03.secureonline.cloud 2a01:7c8:aaae:1e2::2NOERROR, 11 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

warn

serial 2026102201 · primary ns01.secureonline.nl

Found

Primary (MNAME)
ns01.secureonline.nl
Contact (RNAME)
hostmaster.literatuurmuseum.nl
Serial
2026102201
Refresh / retry
3600 s / 3600 s
Expire
1209600 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
ns01.secureonline.nl (89.207.128.251)2026102201
ns01.secureonline.nl (2a00:7b80:476:ffff::2)2026102201
ns02.secureonline.nl (89.207.130.251)2026102201
ns02.secureonline.nl (2a00:7b80:478:ffff::2)2026102201
ns03.secureonline.cloud (77.72.147.249)2026102201
ns03.secureonline.cloud (2a01:7c8:aaae:1e2::2)2026102201

Checks

  • ✓ Serial 2026102201 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 1h should be shorter than refresh 1h. Current values: refresh 1h, retry 1h, expire 14d, negative TTL 30m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns01.secureonline.nl is one of the listed nameservers.
  • ✓ Contact hostmaster@literatuurmuseum.nl #25
    The SOA RNAME hostmaster.literatuurmuseum.nl means hostmaster@literatuurmuseum.nl.
  • ✓ Date-based serial #26
    The serial 2026102201 follows the YYYYMMDDnn convention (2026-10-22).

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

10 records at the apex

Found

Read from
89.207.128.251:53
TypeValueTTL
SOAns01.secureonline.nl. hostmaster.literatuurmuseum.nl. 2026102201 3600 3600 1209600 18003600
NSns02.secureonline.nl.3600
NSns01.secureonline.nl.3600
NSns03.secureonline.cloud.3600
A188.245.73.923600
MX10 literatuurmuseum-nl.mail.protection.outlook.com.3600
TXT"_globalsign-domain-verification=dWmenLSTM143FNb0aYK97Dyx8jM181KRIILLC03eB9"3600
TXT"v=spf1 a ip4:188.245.73.92 ip6:2a01:4f8:1c18:4346::/64 include:spf_he2.cloud-365.nl include:servers.mcsv.net include:spf.protection.outlook.com inclu" "de:_spf.exsilia.net ~all"3600
TXT"MS=ms16441343"3600
TXT"google-site-verification=vcloWZl3bNZkTaZNA8M4N2JtihdP9ULucIGfRNin-Bo"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 1h.
  • ✓ 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