oost.nl

Checked 22 October 2026, 15:02 UTC · via 8.8.8.8
!Passed with warnings
23 passed 2 warnings 0 failed 8 info

Registration

info

.nl country-code

Found

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

Delegation

info

ns1.rtvoost.nl, ns2.rtvoost.nl, ns3.rtvoost.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.rtvoost.nl, ns2.rtvoost.nl, ns3.rtvoost.nl
NS in the zone
ns1.rtvoost.nl, ns2.rtvoost.nl, ns3.rtvoost.nl
NameserverAddressesNetwork (AS)Glue
ns1.rtvoost.nl62.165.73.11 2001:1690:100:1201::11AS20847 PREVIDER-AS - Previder B.V., NL AS20847 PREVIDER-AS - Previder B.V., NL62.165.73.11 2001:1690:100:1201::11
ns2.rtvoost.nl62.165.73.12 2001:1690:100:1201::12AS20847 PREVIDER-AS - Previder B.V., NL AS20847 PREVIDER-AS - Previder B.V., NL62.165.73.12 2001:1690:100:1201::12
ns3.rtvoost.nl185.239.61.211 2001:1690:100:1201::13AS57325 AS204765 - 123Telcom BV trading as Partell, NL AS20847 PREVIDER-AS - Previder B.V., NL185.239.61.211 2001:1690:100:1201::13

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.rtvoost.nl, ns2.rtvoost.nl, ns3.rtvoost.nl.
  • ✓ 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.
  • i
    One address family in one network
    all IPv6 addresses are in 2001:1690:100::/48, while the other address family is spread over several networks.
    #10
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20847 (PREVIDER-AS - Previder B.V., NL): 5 addresses; AS57325 (AS204765 - 123Telcom BV trading as Partell, NL): 1 address.
  • i
    All nameserver names under .nl
    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
ns1.rtvoost.nl 62.165.73.11NOERROR, 11 ms, authoritativenoyes / yesrefusedNot supported
ns1.rtvoost.nl 2001:1690:100:1201::11NOERROR, 11 ms, authoritativenoyes / yesrefusedNot supported
ns2.rtvoost.nl 62.165.73.12NOERROR, 11 ms, authoritativenoyes / yesrefusedNot supported
ns2.rtvoost.nl 2001:1690:100:1201::12NOERROR, 11 ms, authoritativenoyes / yesrefusedNot supported
ns3.rtvoost.nl 185.239.61.211NOERROR, 21 ms, authoritativenoyes / yesrefusedNot supported
ns3.rtvoost.nl 2001:1690:100:1201::13NOERROR, 12 ms, authoritativenoyes / yesrefusedNot supported

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: ns1.rtvoost.nl: "Not supported"; ns2.rtvoost.nl: "Not supported"; ns3.rtvoost.nl: "Not supported".
    #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 2026081931 · primary ns1.rtvoost.nl

Found

Primary (MNAME)
ns1.rtvoost.nl
Contact (RNAME)
hostmaster.rtvoost.nl
Serial
2026081931
Refresh / retry
14400 s / 7200 s
Expire
1209600 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns1.rtvoost.nl (62.165.73.11)2026081931
ns1.rtvoost.nl (2001:1690:100:1201::11)2026081931
ns2.rtvoost.nl (62.165.73.12)2026081931
ns2.rtvoost.nl (2001:1690:100:1201::12)2026081931
ns3.rtvoost.nl (185.239.61.211)2026081931
ns3.rtvoost.nl (2001:1690:100:1201::13)2026081931

Checks

  • ✓ Serial 2026081931 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 2h, expire 14d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.rtvoost.nl is one of the listed nameservers.
  • ✓ Contact hostmaster@rtvoost.nl #25
    The SOA RNAME hostmaster.rtvoost.nl means hostmaster@rtvoost.nl.
  • ✓ Date-based serial #26
    The serial 2026081931 follows the YYYYMMDDnn convention (2026-08-19).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
28 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
44610ECDSAP256SHA256 (13)SHA256 F506DCD870DEC521…yes

DNSKEY in the zone

Key tagRoleAlgorithm
44610KSK (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 44610 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • !
    Signatures expire soon
    The earliest signature expires at 2026-10-28 03:45 UTC (in 133h0m0s). Check that automatic re-signing works.
    #30
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

warn

12 records at the apex

Found

Read from
62.165.73.11:53
TypeValueTTL
SOAns1.rtvoost.nl. hostmaster.rtvoost.nl. 2026081931 14400 7200 1209600 36003600
NSns3.rtvoost.nl.3600
NSns2.rtvoost.nl.3600
NSns1.rtvoost.nl.3600
A62.165.73.203600
AAAA2001:1690:100:1201::203600
MX0 oost-nl.v-v1.mx.microsoft.60
TXT"knowbe4-site-verification=38589f27e34b655ee4539db10bcc03d8"3600
TXT"v=spf1 a mx ip4:62.165.73.0/24 ip4:185.239.61.208/28 ip6:2001:1690:100:1201::/64 ip6:2001:1690:100:1201::112/128 a:malengo.exception.mx include:pigeon1.gomsp.nl include:_spf.salesforce.com include:spf.protection.outlook.com -all"3600
TXT"atlassian-domain-verification=4Q9U2y9f7e0jWaRvGzM/FgOMh8qGDEjzkGz3r9vsG6GjGH728gPY1/laZVgtXOeP"3600
TXT"MS=ms40898832"3600
TXT"google-site-verification=Xqw1tAGDB6KMhMMHQDaqOaX73u1OdZ7wZKP5TKwsQrA"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: MX (1m). Low TTLs are useful just before a planned change.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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