openovergokken.nl

Checked 21 October 2026, 21:24 UTC · via 8.8.8.8
!Passed with warnings
28 passed 1 warning 0 failed 4 info

Registration

info

.nl country-code

Found

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

Delegation

info

a1-167.akam.net, a10-67.akam.net, a12-65.akam.net, a26-64.akam.net, a3-64.akam.net, a5-67.akam.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
a1-167.akam.net, a10-67.akam.net, a12-65.akam.net, a26-64.akam.net, a3-64.akam.net, a5-67.akam.net
NS in the zone
a1-167.akam.net, a10-67.akam.net, a12-65.akam.net, a26-64.akam.net, a3-64.akam.net, a5-67.akam.net
NameserverAddressesNetwork (AS)Glue
a1-167.akam.net193.108.91.167 2600:1401:2::a7AS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a10-67.akam.net96.7.50.67 2600:1480:d000::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a12-65.akam.net184.26.160.65 2600:1480:f000::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a26-64.akam.net23.74.25.64 2600:1480:b800::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a3-64.akam.net96.7.49.64 2600:1408:1c::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a5-67.akam.net95.100.168.67 2600:1480:b000::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-167.akam.net, a10-67.akam.net, a12-65.akam.net, a26-64.akam.net, a3-64.akam.net, a5-67.akam.net.
  • ✓ 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 6 IPv4 /24s and 6 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20940 (AKAMAI-ASN1 - Akamai International B.V., NL): 1 address; AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 11 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

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-167.akam.net 193.108.91.167NOERROR, 4 ms, authoritativenoyes / yesrefused41824.10
a1-167.akam.net 2600:1401:2::a7NOERROR, 4 ms, authoritativenoyes / yesrefused41824.8
a10-67.akam.net 96.7.50.67NOERROR, 3 ms, authoritativenoyes / yesrefused48878.30
a10-67.akam.net 2600:1480:d000::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.26
a12-65.akam.net 184.26.160.65NOERROR, 4 ms, authoritativenoyes / yesrefused48878.26
a12-65.akam.net 2600:1480:f000::41NOERROR, 4 ms, authoritativenoyes / yesrefused48878.27
a26-64.akam.net 23.74.25.64NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a26-64.akam.net 2600:1480:b800::40NOERROR, 4 ms, authoritativenoyes / yesrefused48878.32
a3-64.akam.net 96.7.49.64NOERROR, 4 ms, authoritativenoyes / yesrefused41824.8
a3-64.akam.net 2600:1408:1c::40NOERROR, 4 ms, authoritativenoyes / yesrefused41824.5
a5-67.akam.net 95.100.168.67NOERROR, 4 ms, authoritativenoyes / yesrefused41824.5
a5-67.akam.net 2600:1480:b000::43NOERROR, 4 ms, authoritativenoyes / yesrefused41824.4

Checks

  • ✓ All respond #14
    All 12 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-167.akam.net: "41824.10"; a1-167.akam.net: "41824.8"; a10-67.akam.net: "48878.30"; a10-67.akam.net: "48878.26"; a12-65.akam.net: "48878.26"; a12-65.akam.net: "48878.27"; a26-64.akam.net: "48878.31"; a26-64.akam.net: "48878.32"; a3-64.akam.net: "41824.8"; a3-64.akam.net: "41824.5"; a5-67.akam.net: "41824.5"; a5-67.akam.net: "41824.4". 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

pass

serial 2025080531 · primary a1-167.akam.net

Found

Primary (MNAME)
a1-167.akam.net
Contact (RNAME)
hostmaster.openovergokken.nl
Serial
2025080531
Refresh / retry
3600 s / 600 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
a1-167.akam.net (193.108.91.167)2025080531
a1-167.akam.net (2600:1401:2::a7)2025080531
a10-67.akam.net (96.7.50.67)2025080531
a10-67.akam.net (2600:1480:d000::43)2025080531
a12-65.akam.net (184.26.160.65)2025080531
a12-65.akam.net (2600:1480:f000::41)2025080531
a26-64.akam.net (23.74.25.64)2025080531
a26-64.akam.net (2600:1480:b800::40)2025080531
a3-64.akam.net (96.7.49.64)2025080531
a3-64.akam.net (2600:1408:1c::40)2025080531
a5-67.akam.net (95.100.168.67)2025080531
a5-67.akam.net (2600:1480:b000::43)2025080531

Checks

  • ✓ Serial 2025080531 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 10m, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver a1-167.akam.net is one of the listed nameservers.
  • ✓ Contact hostmaster@openovergokken.nl #25
    The SOA RNAME hostmaster.openovergokken.nl means hostmaster@openovergokken.nl.
  • ✓ Date-based serial #26
    The serial 2025080531 follows the YYYYMMDDnn convention (2025-08-05).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
0 iterations, 0-byte salt
Signatures valid until
24 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
15482ECDSAP256SHA256 (13)SHA256 40B3C9E11FC5D437…yes

DNSKEY in the zone

Key tagRoleAlgorithm
16548ZSK (256)ECDSAP256SHA256 (13)
15482KSK (257)ECDSAP256SHA256 (13)
41248ZSK (256)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 15482 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 73h0m0s and created on demand; the current one was made at 2026-10-21 07:17 UTC and expires at 2026-10-24 08:17 UTC.
  • ✓ NSEC3 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

info

13 records at the apex

Found

Read from
193.108.91.167:53
TypeValueTTL
SOAa1-167.akam.net. hostmaster.openovergokken.nl. 2025080531 3600 600 604800 30086400
NSa5-67.akam.net.86400
NSa26-64.akam.net.86400
NSa12-65.akam.net.86400
NSa1-167.akam.net.86400
NSa10-67.akam.net.86400
NSa3-64.akam.net.86400
A136.144.174.212300
AAAA2a01:7c8:aac7:1c7:5054:ff:fe6c:87de300
MX0 openovergokken-nl.i-v1.mx.microsoft.300
TXT"google-site-verification=0FvallTANDgLn8K6V_D_B1ivByVGL2iyp7J9zrvaDJE"300
TXT"v=spf1 include:pr-dashboard.nl include:spf.protection.outlook.com -all"300
TXT"ms=ms46385351"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 5m, NS 1d. The NS TTL at the parent is 1h and in the zone 1d; 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