vhg.nl

Checked 22 October 2026, 17:01 UTC · via 8.8.8.8
✗Problems found
25 passed 2 warnings 1 failed 5 info

Registration

info

.nl country-code

Found

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

Delegation

info

ns1.exsilia.net, ns2.exsilia.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.exsilia.net, ns2.exsilia.net
NS in the zone
ns1.exsilia.net, ns2.exsilia.net
NameserverAddressesNetwork (AS)Glue
ns1.exsilia.net83.137.146.53 2a01:1b0:4418::53AS31477 DUOCAST-AS - Duocast B.V., NL AS31477 DUOCAST-AS - Duocast B.V., NL-
ns2.exsilia.net91.209.7.53 2a01:1b1:4418::53AS39292 DUOCASTBACKUP-AS - Duocast B.V., NL AS39292 DUOCASTBACKUP-AS - Duocast B.V., NL-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.exsilia.net, ns2.exsilia.net.
    #6
  • ✓ 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: AS31477 (DUOCAST-AS - Duocast B.V., NL): 2 addresses; AS39292 (DUOCASTBACKUP-AS - Duocast B.V., NL): 2 addresses.
  • i
    All nameserver names under .net
    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

fail

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.exsilia.net 83.137.146.53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns1.exsilia.net 2a01:1b0:4418::53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns2.exsilia.net 91.209.7.53NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns2.exsilia.net 2a01:1b1:4418::53NOERROR, 12 ms, authoritativenono / 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.
  • ✗
    No DNS over TCP
    DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: ns2.exsilia.net (2a01:1b1:4418::53): read tcp [2a01:4f8:1c1c:eebf::1]:60446->[2a01:1b1:4418::53]:53: read: connection reset by peer.
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2026091802 · primary ns1.exsilia.net

Found

Primary (MNAME)
ns1.exsilia.net
Contact (RNAME)
hostmaster.quickhost.nl
Serial
2026091802
Refresh / retry
10800 s / 3600 s
Expire
1209600 s
Negative TTL
10800 s

Serial per nameserver

NameserverSerial
ns1.exsilia.net (83.137.146.53)2026091802
ns1.exsilia.net (2a01:1b0:4418::53)2026091802
ns2.exsilia.net (91.209.7.53)2026091802
ns2.exsilia.net (2a01:1b1:4418::53)2026091802

Checks

  • ✓ Serial 2026091802 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 14d, negative TTL 3h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.exsilia.net is one of the listed nameservers.
  • ✓ Contact hostmaster@quickhost.nl #25
    The SOA RNAME hostmaster.quickhost.nl means hostmaster@quickhost.nl.
  • ✓ Date-based serial #26
    The serial 2026091802 follows the YYYYMMDDnn convention (2026-09-18).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
1 iterations, 2-byte salt
Signatures valid until
5 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
30983ECDSAP256SHA256 (13)SHA256 BF0498B496B3B635…yes

DNSKEY in the zone

Key tagRoleAlgorithm
30983KSK (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 30983 (SHA256).
  • ✓ 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.
  • !
    NSEC3 with extra iterations or salt
    NSEC3 uses 1 iteration and a 2-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

warn

7 records at the apex

Found

Read from
83.137.146.53:53
TypeValueTTL
SOAns1.exsilia.net. hostmaster.quickhost.nl. 2026091802 10800 3600 1209600 1080060
NSns2.exsilia.net.60
NSns1.exsilia.net.60
A198.202.211.160
MX0 vhg-nl.mail.protection.outlook.com.60
TXT"v=spf1 mx a ip4:37.97.138.136/32 include:spf.mandrillapp.com include:spf.steam-connect.com include:spfklant.pinkroccade.nl include:mailplus.nl include:spf.protection.outlook.com include:_spf.exsilia.net include:_spf.google.com include:spf.pe-online.org -a" "ll"300
TXT"vhg-nl.mail.protection.outlook.com."300

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), MX (1m), NS (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 1m; 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.
  • 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