sportvisunie.nl

Checked 22 October 2026, 16:11 UTC · via 8.8.8.8
✗Problems found
19 passed 4 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/sportvisunie.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/sportvisunie.nl returned HTTP 429
    #3

Delegation

info

ns1.openprovider.nl, ns4.philipse-it.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.openprovider.nl, ns4.philipse-it.nl
NS in the zone
ns1.openprovider.nl, ns4.philipse-it.nl
NameserverAddressesNetwork (AS)Glue
ns1.openprovider.nl162.159.26.10 2400:cb00:2049:1::a29f:1a0aAS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-
ns4.philipse-it.nl2a01:7c8:bb0a:6de:5054:ff:fe2f:c3f3AS20857 TRANSIP-AS - Signet B.V., NL-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.openprovider.nl, ns4.philipse-it.nl.
    #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 1 IPv4 /24 and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 2 addresses; AS20857 (TRANSIP-AS - Signet B.V., 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

fail

2 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.openprovider.nl 162.159.26.10NOERROR, 25 ms, authoritativenoyes / yesrefused2026.10.8
ns1.openprovider.nl 2400:cb00:2049:1::a29f:1a0aNOERROR, 25 ms, authoritativenoyes / yesrefused2026.10.8
ns4.philipse-it.nl 2a01:7c8:bb0a:6de:5054:ff:fe2f:c3f3no responsenono / no--

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: ns4.philipse-it.nl (2a01:7c8:bb0a:6de:5054:ff:fe2f:c3f3): read udp [2a01:4f8:1c1c:eebf::1]:54737->[2a01:7c8:bb0a:6de:5054:ff:fe2f:c3f3]:53: read: permission denied.
    #14
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.openprovider.nl: "2026.10.8". Hide or replace the version string.
    #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

warn

serial 2026100501 · primary ns4.philipse-it.nl

Found

Primary (MNAME)
ns4.philipse-it.nl
Contact (RNAME)
helpdesk.sportvisunie.nl
Serial
2026100501
Refresh / retry
300 s / 900 s
Expire
1209600 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
ns1.openprovider.nl (162.159.26.10)2026100501
ns1.openprovider.nl (2400:cb00:2049:1::a29f:1a0a)2026100501

Checks

  • ✓ Serial 2026100501 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 5m is outside 20m–1d; retry 15m should be shorter than refresh 5m. Current values: refresh 5m, retry 15m, expire 14d, negative TTL 15m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns4.philipse-it.nl is one of the listed nameservers.
  • ✓ Contact helpdesk@sportvisunie.nl #25
    The SOA RNAME helpdesk.sportvisunie.nl means helpdesk@sportvisunie.nl.
  • ✓ Date-based serial #26
    The serial 2026100501 follows the YYYYMMDDnn convention (2026-10-05).

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

9 records at the apex

Found

Read from
162.159.26.10:53
TypeValueTTL
SOAns4.philipse-it.nl. helpdesk.sportvisunie.nl. 2026100501 300 900 1209600 90060
NSns4.philipse-it.nl.60
NSns1.openprovider.nl.60
A34.117.211.12560
MX0 sportvisunie-nl.mail.protection.outlook.com.60
TXT"google-site-verification=An40Imx4hj6B7o39Ew-MJDF-LLRPFmoXi3PFA9Pja38"60
TXT"MS=ms99876552"60
TXT"v=spf1 mx a ip4:46.44.172.69/32 ip4:213.125.182.101/32 include:spf.afas.online include:spf.protection.outlook.com include:spf.topdesk.net include:spf.crowdtech.com include:spf.flowmailer.net -all"60
TXT"google-site-verification=R3edeuXIjGJmTE1ZunzYcvxUbPVsntkP2QF3a3767UE"60

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