hvu.nl

Checked 22 October 2026, 13:51 UTC · via 8.8.8.8
!Passed with warnings
20 passed 2 warnings 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/hvu.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/hvu.nl returned HTTP 429
    #3

Delegation

warn

ns2.hvu.nl, watson.hvu.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns2.hvu.nl, watson.hvu.nl
NS in the zone
ns2.hvu.nl, watson.hvu.nl
NameserverAddressesNetwork (AS)Glue
ns2.hvu.nl145.89.83.3 2001:610:310:1100::83:3AS1103 SURFNET-NL - SURF B.V., NL AS1103 SURFNET-NL - SURF B.V., NL145.89.83.3
watson.hvu.nl145.89.38.3 2001:610:310:1000::38:3AS1103 SURFNET-NL - SURF B.V., NL AS1103 SURFNET-NL - SURF B.V., NL145.89.38.3

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns2.hvu.nl, watson.hvu.nl.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: ns2.hvu.nl (glue 145.89.83.3, zone 145.89.83.3, 2001:610:310:1100::83:3); watson.hvu.nl (glue 145.89.38.3, zone 145.89.38.3, 2001:610:310:1000::38:3). Update the glue at your registrar.
    #8
  • ✓ 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 2001:610:310::/48, while the other address family is spread over several networks.
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS1103 (SURFNET-NL - SURF B.V., NL): 4 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns2.hvu.nl 145.89.83.3NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns2.hvu.nl 2001:610:310:1100::83:3NOERROR, 15 ms, authoritativenoyes / yesrefused-
watson.hvu.nl 145.89.38.3NOERROR, 12 ms, authoritativenoyes / yesrefused-
watson.hvu.nl 2001:610:310:1000::38:3NOERROR, 11 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 4 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 2013092324 · primary watson.hvu.nl

Found

Primary (MNAME)
watson.hvu.nl
Contact (RNAME)
hostmaster.hu.nl
Serial
2013092324
Refresh / retry
10800 s / 3600 s
Expire
2419200 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns2.hvu.nl (145.89.83.3)2013092324
ns2.hvu.nl (2001:610:310:1100::83:3)2013092324
watson.hvu.nl (145.89.38.3)2013092324
watson.hvu.nl (2001:610:310:1000::38:3)2013092324

Checks

  • ✓ Serial 2013092324 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 28d, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver watson.hvu.nl is one of the listed nameservers.
  • ✓ Contact hostmaster@hu.nl #25
    The SOA RNAME hostmaster.hu.nl means hostmaster@hu.nl.
  • ✓ Date-based serial #26
    The serial 2013092324 follows the YYYYMMDDnn convention (2013-09-23).

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

info

5 records at the apex

Found

Read from
145.89.83.3:53
TypeValueTTL
SOAwatson.hvu.nl. hostmaster.hu.nl. 2013092324 10800 3600 2419200 60028800
NSwatson.hvu.nl.28800
NSns2.hvu.nl.28800
A145.89.60.24628800
TXT"HARICA-y8I8MIFBBkcU8MIVxy6"28800

Checks

  • ✓ TTLs within range #32
    TTLs: A 8h, 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.
  • 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