rocvantwente.nl

Checked 22 October 2026, 15:41 UTC · via 8.8.8.8
!Passed with warnings
20 passed 4 warnings 0 failed 5 info

Registration

info

.nl country-code

Found

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

Delegation

warn

ns01.rocvantwente.nl, ns02.rocvantwente.nl, ns03.rocvantwente.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns01.rocvantwente.nl, ns02.rocvantwente.nl, ns03.rocvantwente.nl
NS in the zone
ns01.rocvantwente.nl, ns02.rocvantwente.nl, ns03.rocvantwente.nl
NameserverAddressesNetwork (AS)Glue
ns01.rocvantwente.nl145.97.126.11AS1103 SURFNET-NL - SURF B.V., NL145.97.126.11
ns02.rocvantwente.nl145.97.126.12AS1103 SURFNET-NL - SURF B.V., NL145.97.126.12
ns03.rocvantwente.nl145.97.126.133AS1103 SURFNET-NL - SURF B.V., NL145.97.126.133

Checks

  • ✓ 3 nameservers #6
    Delegated to ns01.rocvantwente.nl, ns02.rocvantwente.nl, ns03.rocvantwente.nl.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns01.rocvantwente.nl, ns02.rocvantwente.nl, ns03.rocvantwente.nl.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • !
    Nameservers in one network
    all IPv4 addresses are in 145.97.126.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS1103 (SURFNET-NL - SURF B.V., NL): 3 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 .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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

info

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns01.rocvantwente.nl 145.97.126.11NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns02.rocvantwente.nl 145.97.126.12NOERROR, 13 ms, authoritativenoyes / yesrefusedUnkown
ns03.rocvantwente.nl 145.97.126.133NOERROR, 13 ms, authoritativenoyes / yesrefusedUnkown

Checks

  • ✓ All respond #14
    All 3 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: ns02.rocvantwente.nl: "Unkown"; ns03.rocvantwente.nl: "Unkown".
    #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 2023065396 · primary ns01.rocvantwente.nl

Found

Primary (MNAME)
ns01.rocvantwente.nl
Contact (RNAME)
hostmaster.rocvantwente.nl
Serial
2023065396
Refresh / retry
3600 s / 1800 s
Expire
1209600 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns01.rocvantwente.nl (145.97.126.11)2023065396
ns02.rocvantwente.nl (145.97.126.12)2023065396
ns03.rocvantwente.nl (145.97.126.133)2023065396

Checks

  • ✓ Serial 2023065396 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 30m, expire 14d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns01.rocvantwente.nl is one of the listed nameservers.
  • ✓ Contact hostmaster@rocvantwente.nl #25
    The SOA RNAME hostmaster.rocvantwente.nl means hostmaster@rocvantwente.nl.
  • ✓ Timestamp serial #26
    The serial 2023065396 is a Unix timestamp (2034-02-09 02:36 UTC).

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

warn

25 records at the apex

Found

Read from
145.97.126.11:53
TypeValueTTL
SOAns01.rocvantwente.nl. hostmaster.rocvantwente.nl. 2023065396 3600 1800 1209600 300300
NSns02.rocvantwente.nl.300
NSns03.rocvantwente.nl.300
NSns01.rocvantwente.nl.300
A145.97.64.239300
MX10 rocvantwente-nl.j-v1.mx.microsoft.60
TXT"HARICA-fHhp0YB3TLsVJZNn500"300
TXT"adobe-idp-site-verification=d9b2191aebacc1d4d58ab84660edcbfb84df94bb864c827ba2131461c83963bf"3600
TXT"v=spf1 include:spf.protection.outlook.com" " include:spf.docufillermail.nl" " include:amazonses.com" " include:spf.mandrillapp.com" " include:servers.mcsv.net" " include:spf.flowmailer.net" " include:_spf.schoolfit.nl" " include:spf.mailjet.com" " include:spf.tribecrm.nl" " ip4:87.195.18.70/32 -all"3600
TXT"google-site-verification=M_IYncTr5aREkocHA_NYW-SsOSuDrncgVggjxIWwJxg"300
TXT"ta+p9R7Srx46vELEdGWIj5ZdESpYykyB8eycMf/LX4oLI1+skW9UuKxOAout4EsbKQndctjxm7Or78Vd+BDPKw=="3600
TXT"apple-domain-verification=67AzyzQPewZYM8Qb"300
TXT"d365mktkey=UBQ54b9MbGAFggqiRyly7DAZumODGdKVdrbZ2fv2n9Ex"300
TXT"google-site-verification=_vcsVazMdRR-6cuNNWL1AntjwxtWe5qwR8E_v5wKvMw"3600
TXT"kWQx/PjhhHRDy6eawM5VoyTaZ4M4PA9P/TobSsR+b4Mo24NWZdEopNp9lynnNcKKXF85b5XbZdZvVHiUpcY/QQ=="300
TXT"DomainVerification=X9ACMQKDTQX6TBTUJUAPB8WINDQ6GGPSLADP5EB0UYYO6L804BWCQB4C36CV2GTE"300
TXT"amazonses:TA6vAK4Dk4w5nnVdfPgtZZ2hrMGEa20cKoz00pFD5tc="3600
TXT"d365mktkey=W44tymtxt2oNFGPuKz91OW6rMgKaOJ5c6x6B9zNExi8x"300
TXT"d365mktkey=hrMBToPW8iycfVuEr9y4InqQFmSZBfHrTpYfI5AIwWAx"300
TXT"MS=ms99918645"3600
TXT"google-site-verification=1FCRB1Hjf3M9xpupLy5VJVsJJAN9g-BdlSLlForK41Y"3600
TXT"d365mktkey=XoD5VVCamx2eOe8lvJRTFYFdWmeulx2PRUcrsk99HoYx"300
CAA0 iodef "mailto:hostmaster@rocvantwente.nl"300
CAA0 issue "harica.gr"300
CAA0 issuewild ";"300

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. The NS TTL at the parent is 1h and in the zone 5m; resolvers may use either.
    #32
  • ✓ 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: harica.gr, none (issuance forbidden).