leidseschouwburg-stadsgehoorzaal.nl

Checked 22 October 2026, 14:10 UTC · via 8.8.8.8
iAll checks passed
27 passed 0 warnings 0 failed 6 info

Registration

info

.nl country-code

Found

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

Delegation

info

ns0.slik.eu, ns1.slik.eu, ns2.slik.eu

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns0.slik.eu, ns1.slik.eu, ns2.slik.eu
NS in the zone
ns0.slik.eu, ns1.slik.eu, ns2.slik.eu
NameserverAddressesNetwork (AS)Glue
ns0.slik.eu193.227.117.225 2a04:2b00:14cc::225AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT-
ns1.slik.eu194.50.187.225 2a04:2b00:14dd::225AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT-
ns2.slik.eu194.0.182.225 2a04:2b00:14ee::225AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns0.slik.eu, ns1.slik.eu, ns2.slik.eu.
  • ✓ 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.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS1921 (RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT): 6 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • i
    All nameserver names under .eu
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns0.slik.eu 193.227.117.225NOERROR, 4 ms, authoritativenoyes / yesrefusedRcodeZero DNS
ns0.slik.eu 2a04:2b00:14cc::225NOERROR, 4 ms, authoritativenoyes / yesrefusedRcodeZero DNS
ns1.slik.eu 194.50.187.225NOERROR, 13 ms, authoritativenoyes / yesrefusedreg-wie1
ns1.slik.eu 2a04:2b00:14dd::225NOERROR, 13 ms, authoritativenoyes / yesrefusedreg-wie1
ns2.slik.eu 194.0.182.225NOERROR, 3 ms, authoritativenoyes / yesrefusedRcodeZero DNS
ns2.slik.eu 2a04:2b00:14ee::225NOERROR, 4 ms, authoritativenoyes / yesrefusedRcodeZero DNS

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns0.slik.eu: "RcodeZero DNS"; ns1.slik.eu: "reg-wie1"; ns2.slik.eu: "RcodeZero DNS".
    #17
  • ✓ 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 2026064467 · primary ns0.slik.eu

Found

Primary (MNAME)
ns0.slik.eu
Contact (RNAME)
hostmaster.slik.eu
Serial
2026064467
Refresh / retry
14400 s / 3600 s
Expire
604800 s
Negative TTL
10800 s

Serial per nameserver

NameserverSerial
ns0.slik.eu (193.227.117.225)2026064467
ns0.slik.eu (2a04:2b00:14cc::225)2026064467
ns1.slik.eu (194.50.187.225)2026064467
ns1.slik.eu (2a04:2b00:14dd::225)2026064467
ns2.slik.eu (194.0.182.225)2026064467
ns2.slik.eu (2a04:2b00:14ee::225)2026064467

Checks

  • ✓ Serial 2026064467 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 7d, negative TTL 3h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns0.slik.eu is one of the listed nameservers.
  • ✓ Contact hostmaster@slik.eu #25
    The SOA RNAME hostmaster.slik.eu means hostmaster@slik.eu.
  • ✓ Timestamp serial #26
    The serial 2026064467 is a Unix timestamp (2034-03-15 19:41 UTC).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
0 iterations, 0-byte salt
Signatures valid until
5 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
51734ECDSAP256SHA256 (13)SHA256 12D52BFBA792007E…yes

DNSKEY in the zone

Key tagRoleAlgorithm
42530ZSK (256)ECDSAP256SHA256 (13)
51734KSK (257)ECDSAP256SHA256 (13)

Checks

  • ✓ Signed and validated #27
    The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
  • ✓ DS matches a key #28
    The DS record at the parent matches a key in the zone: key tag 51734 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Signatures valid until 2026-11-05 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-05 00:00 UTC.
  • ✓ NSEC3 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

info

12 records at the apex

Found

Read from
193.227.117.225:53
TypeValueTTL
SOAns0.slik.eu. hostmaster.slik.eu. 2026064467 14400 3600 604800 1080010800
NSns0.slik.eu.86400
NSns1.slik.eu.86400
NSns2.slik.eu.86400
A95.215.189.1013600
AAAA2a00:51c0:12:ff07::24403600
MX10 leidseschouwburgstadsgehoorzaal-nl04b.c-v1.mx.microsoft.3600
TXT"MS=ms97943284"3600
TXT"amazonses:y7l5stf8KtLxAy12eFnKTmgtL0V6xZq6yLt0uHwXip0="3600
TXT"google-site-verification=_HhoGGeAWsXsb6u8HkPvVkMcC-MXO7ymka39vca7xDI"3600
TXT"HqwgIMu/1kNDdXgyRm1QI73palr6aAmLCoE9hTfEEYZb/N++g4McuQbdVsJWF+vD4yZz7y32wqVcwrA0fBYkbw=="3600
TXT"v=spf1 ip4:46.44.147.192/21 include:spf.protection.outlook.com include:spf.mtasv.net include:servers.mcsv.net include:spf.slik.eu include:sendgrid.net include:amazonses.com include:_spf.mailer.twinfield.com include:spf.mailinglijst.nl -all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, AAAA 1h, 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