sportvisserijnederland.nl

Checked 22 October 2026, 16:11 UTC · via 8.8.8.8
✗Problems found
21 passed 4 warnings 1 failed 7 info

Registration

info

.nl country-code

Found

TLD
.nl (country-code)
ICANN policies apply
no
Lookup error: https://rdap.sidn.nl/domain/sportvisserijnederland.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/sportvisserijnederland.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.nl93.119.1.180 2a01:7c8:bb0a:6de:5054:ff:fe2f:c3f3AS20857 TRANSIP-AS - Signet B.V., NL AS20857 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 2 IPv4 /24s 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): 2 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

fail

3 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.openprovider.nl 162.159.26.10NOERROR, 35 ms, authoritativenoyes / yesrefused2026.10.8
ns1.openprovider.nl 2400:cb00:2049:1::a29f:1a0aNOERROR, 30 ms, authoritativenoyes / yesrefused2026.10.8
ns4.philipse-it.nl 93.119.1.180NOERROR, 13 ms, authoritativenoyes / yesrefusednone
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]:39362->[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 2026080794 · primary ns4.philipse-it.nl

Found

Primary (MNAME)
ns4.philipse-it.nl
Contact (RNAME)
helpdesk.sportvisunie.nl
Serial
2026080794
Refresh / retry
300 s / 900 s
Expire
1209600 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
ns1.openprovider.nl (162.159.26.10)2026080794
ns1.openprovider.nl (2400:cb00:2049:1::a29f:1a0a)2026080794
ns4.philipse-it.nl (93.119.1.180)2026080795

Checks

  • !
    Serials differ
    The nameservers serve different versions of the zone: 2026080794 on ns1.openprovider.nl (162.159.26.10), ns1.openprovider.nl (2400:cb00:2049:1::a29f:1a0a); 2026080795 on ns4.philipse-it.nl (93.119.1.180). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.
    #22
  • !
    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 2026080794 follows the YYYYMMDDnn convention (2026-08-07).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
18 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
15146RSASHA256 (8)SHA256 10F5BD0657CC11EE…yes
51299RSASHA256 (8)SHA256 B72BE94045B43DE1…yes

DNSKEY in the zone

Key tagRoleAlgorithm
15146KSK (257)RSASHA256 (8)
24060ZSK (256)RSASHA256 (8)
51299KSK (257)RSASHA256 (8)

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 15146 (SHA256), key tag 51299 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: RSASHA256 (8).
  • ✓ Signatures valid until 2026-11-18 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-18 20:46 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

warn

8 records at the apex

Found

Read from
162.159.26.10:53
TypeValueTTL
SOAns4.philipse-it.nl. helpdesk.sportvisunie.nl. 2026080794 300 900 1209600 90060
NSns4.philipse-it.nl.60
NSns1.openprovider.nl.60
A109.72.87.9060
MX0 sportvisserijnederland-nl.mail.protection.outlook.com.60
TXT"v=spf1 ip4:92.68.212.2 ip4:212.121.99.246 ip4:213.201.146.210/30 ip4:217.26.124.116 ip4:217.26.124.148 ip4:185.46.182.208 ip4:159.46.195.73 ip4:87.213.105.125 include:spf.protection.outlook.com include:spf.afas.online ip4:185.46.182.203 include:spf.sportv" "isserijnederland.nl -all"60
TXT"linkedin-site verification=7600334c-354c-4075-909c-b6675208e948"60
TXT"google-site-verification=_u9eyja9j6rRFc50zZA7ThVos2ZlTBGAvDHhoEI9JhY"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.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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