vbo.nl

Checked 22 October 2026, 17:00 UTC · via 8.8.8.8
!Passed with warnings
24 passed 1 warning 0 failed 7 info

Registration

info

.nl country-code

Found

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

Delegation

info

ns1.caveo.nl, ns2.caveo.nl, ns3.caveo.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.caveo.nl, ns2.caveo.nl, ns3.caveo.nl
NS in the zone
ns1.caveo.nl, ns2.caveo.nl, ns3.caveo.nl
NameserverAddressesNetwork (AS)Glue
ns1.caveo.nl81.18.160.2AS24642 NL-CAVEO - Caveo Internet BV, NL81.18.160.2
ns2.caveo.nl81.18.161.2 2001:1aa8:2:161::2AS24642 NL-CAVEO - Caveo Internet BV, NL AS24642 NL-CAVEO - Caveo Internet BV, NL81.18.161.2 2001:1aa8:2:161::2
ns3.caveo.nl141.138.139.110 2a01:7c8:aaaa:164:5054:ff:fec8:3d37AS20857 TRANSIP-AS - Signet B.V., NL AS20857 TRANSIP-AS - Signet B.V., NL141.138.139.110 2a01:7c8:aaaa:164:5054:ff:fec8:3d37

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.caveo.nl, ns2.caveo.nl, ns3.caveo.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.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 3 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20857 (TRANSIP-AS - Signet B.V., NL): 2 addresses; AS24642 (NL-CAVEO - Caveo Internet BV, NL): 3 addresses.
  • 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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns1.caveo.nl.
    #13

Nameservers

info

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.caveo.nl 81.18.160.2NOERROR, 10 ms, authoritativenoyes / yesrefusedcaveodns
ns2.caveo.nl 81.18.161.2NOERROR, 10 ms, authoritativenoyes / yesrefusedcaveodns
ns2.caveo.nl 2001:1aa8:2:161::2NOERROR, 10 ms, authoritativenoyes / yesrefusedcaveodns
ns3.caveo.nl 141.138.139.110NOERROR, 11 ms, authoritativenoyes / yesrefusedcaveodns
ns3.caveo.nl 2a01:7c8:aaaa:164:5054:ff:fec8:3d37NOERROR, 12 ms, authoritativenoyes / yesrefusedcaveodns

Checks

  • ✓ All respond #14
    All 5 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.caveo.nl: "caveodns"; ns2.caveo.nl: "caveodns"; ns3.caveo.nl: "caveodns".
    #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 2026042811 · primary ns1.caveo.nl

Found

Primary (MNAME)
ns1.caveo.nl
Contact (RNAME)
hostmaster.caveo.nl
Serial
2026042811
Refresh / retry
28800 s / 7200 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.caveo.nl (81.18.160.2)2026042811
ns2.caveo.nl (81.18.161.2)2026042811
ns2.caveo.nl (2001:1aa8:2:161::2)2026042811
ns3.caveo.nl (141.138.139.110)2026042811
ns3.caveo.nl (2a01:7c8:aaaa:164:5054:ff:fec8:3d37)2026042811

Checks

  • ✓ Serial 2026042811 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.caveo.nl is one of the listed nameservers.
  • ✓ Contact hostmaster@caveo.nl #25
    The SOA RNAME hostmaster.caveo.nl means hostmaster@caveo.nl.
  • ✓ Date-based serial #26
    The serial 2026042811 follows the YYYYMMDDnn convention (2026-04-28).

DNSSEC

warn

Signed, but no DS at parent

Found

Validated by resolver
no
Denial of existence
NSEC
Signatures valid until
5 November 2026

DNSKEY in the zone

Key tagRoleAlgorithm
21729KSK (257)ECDSAP256SHA256 (13)

Checks

  • !
    Signed but not delegated securely
    The zone is signed but the parent has no DS record, so the signatures are not used. Publish the DS record at your registrar.
    #27
  • ✓ 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.
  • 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

info

11 records at the apex

Found

Read from
81.18.160.2:53
TypeValueTTL
SOAns1.caveo.nl. hostmaster.caveo.nl. 2026042811 28800 7200 1209600 8640014400
NSns1.caveo.nl.3600
NSns2.caveo.nl.3600
NSns3.caveo.nl.3600
A37.97.209.217200
MX0 vbo-nl.mail.protection.outlook.com.3600
TXT"MS=ms13517152"3600
TXT"google-site-verification=jgCZ2TqH2jJ5G-vM6lNz4kY6BdVPjmF-Wljhv9zRv4g"3600
TXT"v=spf1 include:et._spf.pardot.com include:spf.vbo.nl include:spf.protection.outlook.com include:servers.mcsv.net exists:%{i}._spf.mta.salesforce.com include:_spf.softtechhosting.nl include:_spf.cash.nl -all"3600
TXT"google-site-verification=Iik_l9j7Ke9T7vnk7OKa7UE8x8Lw7ogsJvnBgOMDss8"86400
TXT"linkedin-site-verification=bb35b9a6-2425-4920-9102-281efb5532ed"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 2h, 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