leeuwarden.nl

Checked 22 October 2026, 14:10 UTC · via 8.8.8.8
!Passed with warnings
27 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/leeuwarden.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/leeuwarden.nl returned HTTP 429
    #3

Delegation

pass

nsauth1.bit.nl, nsauth2.bit.nl, nsauth3.bitnl.eu

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
nsauth1.bit.nl, nsauth2.bit.nl, nsauth3.bitnl.eu
NS in the zone
nsauth1.bit.nl, nsauth2.bit.nl, nsauth3.bitnl.eu
NameserverAddressesNetwork (AS)Glue
nsauth1.bit.nl213.136.12.51 2001:7b8:3:2c::53AS12859 NL-BIT - BIT BV, NL AS12859 NL-BIT - BIT BV, NL213.136.12.51 2001:7b8:3:2c::53
nsauth2.bit.nl213.136.12.59 2001:7b8:3:2d::53AS12859 NL-BIT - BIT BV, NL AS12859 NL-BIT - BIT BV, NL213.136.12.59 2001:7b8:3:2d::53
nsauth3.bitnl.eu85.17.15.88 2001:1af8:4700:a119:16:0:8517:1588AS60781 LEASEWEB-NL-AMS-01 - LeaseWeb Netherlands B.V., NL AS60781 LEASEWEB-NL-AMS-01 - LeaseWeb Netherlands B.V., NL-

Checks

  • ✓ 3 nameservers #6
    Delegated to nsauth1.bit.nl, nsauth2.bit.nl, nsauth3.bitnl.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 2 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS12859 (NL-BIT - BIT BV, NL): 4 addresses; AS60781 (LEASEWEB-NL-AMS-01 - LeaseWeb Netherlands B.V., NL): 2 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .eu, .nl.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
nsauth1.bit.nl 213.136.12.51NOERROR, 11 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.15 (built May 11 2026 09:10:06 by root@localhost)
nsauth1.bit.nl 2001:7b8:3:2c::53NOERROR, 10 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.15 (built May 11 2026 09:10:06 by root@localhost)
nsauth2.bit.nl 213.136.12.59NOERROR, 11 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.15 (built May 11 2026 09:10:06 by root@localhost)
nsauth2.bit.nl 2001:7b8:3:2d::53NOERROR, 11 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.15 (built May 11 2026 09:10:06 by root@localhost)
nsauth3.bitnl.eu 85.17.15.88NOERROR, 10 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.11 (built Oct 15 2025 10:16:15 by root@localhost)
nsauth3.bitnl.eu 2001:1af8:4700:a119:16:0:8517:1588NOERROR, 10 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.11 (built Oct 15 2025 10:16:15 by root@localhost)

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: nsauth1.bit.nl: "PowerDNS Authoritative Server 4.9.15 (built May 11 2026 09:10:06 by root@localhost)"; nsauth2.bit.nl: "PowerDNS Authoritative Server 4.9.15 (built May 11 2026 09:10:06 by root@localhost)"; nsauth3.bitnl.eu: "PowerDNS Authoritative Server 4.9.11 (built Oct 15 2025 10:16:15 by root@localhost)". Hide or replace the version string.
    #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

info

serial 2016290789 · primary a-p-ddi-0003.leeuwarden.nl

Found

Primary (MNAME)
a-p-ddi-0003.leeuwarden.nl
Contact (RNAME)
servicedesk.leeuwarden.nl
Serial
2016290789
Refresh / retry
10800 s / 1080 s
Expire
2419200 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
nsauth1.bit.nl (213.136.12.51)2016290789
nsauth1.bit.nl (2001:7b8:3:2c::53)2016290789
nsauth2.bit.nl (213.136.12.59)2016290789
nsauth2.bit.nl (2001:7b8:3:2d::53)2016290789
nsauth3.bitnl.eu (85.17.15.88)2016290789
nsauth3.bitnl.eu (2001:1af8:4700:a119:16:0:8517:1588)2016290789

Checks

  • ✓ Serial 2016290789 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 18m, expire 28d, negative TTL 15m.
  • i
    Hidden master
    The primary nameserver a-p-ddi-0003.leeuwarden.nl is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact servicedesk@leeuwarden.nl #25
    The SOA RNAME servicedesk.leeuwarden.nl means servicedesk@leeuwarden.nl.
  • ✓ Timestamp serial #26
    The serial 2016290789 is a Unix timestamp (2033-11-22 16:46 UTC).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
10 iterations, 1-byte salt
Signatures valid until
26 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
39529RSASHA256 (8)SHA256 C383F613E25AFD16…yes
43909RSASHA256 (8)SHA256 008FA6D49650BB5A…NO
12166RSASHA256 (8)SHA256 F49D985A3339D0CB…NO
30109RSASHA256 (8)SHA256 F7F32D0E55A87DF8…NO

DNSKEY in the zone

Key tagRoleAlgorithm
38995ZSK (256)RSASHA256 (8)
32460ZSK (256)RSASHA256 (8)
39529KSK (257)RSASHA256 (8)

Checks

  • ✓ Signed and validated #27
    The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
  • i
    Unused DS records
    These DS records match no key in the zone: key tag 43909 (SHA256), key tag 12166 (SHA256), key tag 30109 (SHA256). That is normal during a key rollover; otherwise remove them.
    #28
  • ✓ Modern algorithms #29
    Key algorithms: RSASHA256 (8).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 97h0m0s and created on demand; the current one was made at 2026-10-22 03:32 UTC and expires at 2026-10-26 04:04 UTC.
  • !
    NSEC3 with extra iterations or salt
    NSEC3 uses 10 iterations and a 1-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.
    #31

Records

pass

50 records at the apex

Found

Read from
213.136.12.51:53
TypeValueTTL
SOAa-p-ddi-0003.leeuwarden.nl. servicedesk.leeuwarden.nl. 2016290789 10800 1080 2419200 90028800
NSnsauth2.bit.nl.28800
NSnsauth3.bitnl.eu.28800
NSnsauth1.bit.nl.28800
A212.114.120.528800
AAAA2001:7b8:62b:1:0:d4ff:fe72:780528800
MX10 leeuwarden-nl.mail.protection.outlook.com.300
TXT""28800
TXT"619c3609fcb0cc0a356469c5aad572acebc245a1cc9f84b8f3b7e60d8eb5ad34"28800
TXT"6BG659lV8hKIgy3PLW7KNe4rzcWdcKzsHw2ViNLZf0Q61HySMmlQOLbENDigSUoO"28800
TXT"89OuDwoSHeDTI6md2TMq09G4FN0swbn3Yps93KTHKuJl728sPvtiAorMVXWbILUG"28800
TXT"9HwE7fpg60BEcQhfoPJHfIseWUu3aw9wKuK7y94dzECn4QBy0FO54PD6C2GgKxNP"28800
TXT"AT0QqVOI8KKLDx62C4whiL9AMjEPkrLh75Fh2jdFBKsXo3tCOxDg8K5neMGKoAZe"28800
TXT"AkCwJb50VjCJfvavXkXMKc5FhCxf5XG8gfMEbFnHZkN59ni8rdGJWyGRVaLN9Lgc"28800
TXT"E7SHcYgliEUA0byaSLd20AKer5wDmDsE0FLHWJyjRZ3n7OSqBNBVHfM7apkxCIZr"28800
TXT"MS=ms89796297"28800
TXT"PlULNv3kTUHXRHTlgCmiGMO4SRMLMaJEmI1mIckXYFG3xXOa0yGHV5TIdIxAFLYg"28800
TXT"Qaxa4A03ejhB6ccPo7Tn3NaGEgKwdpQOakuNNML74qIFpuKSNLkrRckvpiGgZZQo"28800
TXT"Raw0IeoLvYdupOJOgA5VMtxxLUcsC7wwc44VHY2y02nJVTLGryF3O99D7IBlkUhH"28800
TXT"W3HQrKJbPNcOtRvUBVQSwBB4z3jTK1QxHOrsdFHlxBAsUQthcIoAiZxx52JcKAIx"28800
TXT"Z2VtZWVudGU="28800
TXT"_0mtjaijm0it8jad1ohk1tyipq4awd31"28800
TXT"amazonses:QV6idc6cIstLFX7mkq9QI/VbUpHSzx4jH9oNCMyYX5w="28800
TXT"apple-domain-verification=1UgOKql869Bclv2t"28800
TXT"aswEeEr9QM3yoEayAiJ4vGYkdQ4S6TFOEoltSxrdWeeWx6BdcWlNxVonjzxjy9Xv"28800
TXT"citrix.mobile.ads.otp=s2gw1abn600kpf8ytvfh"28800
TXT"czz24NflSYak7MAFh336Q0GWHjPshAFiNfNVVdcigT7xLUCnUvpKWnsUSpskoVDG"28800
TXT"dQTaSdgJ4iV7RK9hmvDN"28800
TXT"e9402a7e2a3704b96a241333527dad3e1185364da08d84d93eefad78c2328ed2"28800
TXT"fd9cbf0cf9c1bf2382c8bfc57e34964c925f02cc20aaa454497c4164bc8fe171"28800
TXT"google-site-verification=tO3V8bRl6f0uqWurAokYAWNgCC9G8-gP24vUUGoRf4c"28800
TXT"iqSWdieH2NQ4eboCB6NDidpx2OKiSGJlOKGvoi7Ti97upWx7lFpfI8cjeDe8YX4P"28800
TXT"j+2kwq61bYKmZlcOCf6d+u8p1bJPYFuM7bsgvTGOEeV6YpmyhBGzYrWAwOo3wOOKsDUo5TnTLlFQBI5OQmfajQ=="28800
TXT"kysUPkjZrdhbbJBXjoKyf8Q2TyrhbMB6k9XA2NNg2tTRNvqeN5mRNSWe8Td28T6L"28800
TXT"px8SsgGjukZ39EYxsmF1IRLRYaTF2SAHvqgLjoOaK53IuiAdcJegGmPoH2yt0h2Z"28800
TXT"qXZFTT1sYs58qqBW9l0sVhDNuGu3HQRTrUDForhWd7SXH48dsHahVG5UEuHAKRmp"28800
TXT"t36v0sr7bNVeYTmVjfGGCcsOPzSbig2euX5Vta4Fke9lNLe3vujbka5jBXHrHrlF"28800
TXT"uOmejmLtU4RChXWLG8lAQWCGDsJO6sVAf7qNlOAvFaRmp3R1dOBMtaO8h75oPH5a"28800
TXT"v=spf1 a mx ip4:145.87.1.129 include:spf.protection.outlook.com -all"28800
TXT"vmp3cSDvplHv7WZP5AuvgZJtUbsJEg4JTItz5KAkX4ljoM7PiIjfUh8qyRLQ0Gfj"28800
TXT"wirfvlh97d9i9IUUZWJkTemxxJov8UQu40EY7FS88arKEnwsjbg6RPD43PKCf9C0"28800
TXT"xuy6HM9XHg6vTJ76vClHNWcweHniP9li41gDsiu9zIkxpCN4cYVF7aYLcVoxUugK"28800
CAA0 issue "certsign.ro"28800
CAA0 issue "amazonaws.com"28800
CAA0 issue "letsencrypt.org"28800
CAA0 issue "amazon.com"28800
CAA0 issue "amazontrust.com"28800
CAA0 issue "www.digicert.com"28800
CAA0 issue "sectigo.com"28800
CAA0 issue "awstrust.com"28800

Checks

  • ✓ TTLs within range #32
    TTLs: A 8h, AAAA 8h, MX 5m, NS 8h. The NS TTL at the parent is 1h and in the zone 8h; 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: certsign.ro, amazonaws.com, letsencrypt.org, amazon.com, amazontrust.com, www.digicert.com, sectigo.com, awstrust.com.