wza.nl

Checked 22 October 2026, 17:20 UTC · via 8.8.8.8
!Passed with warnings
23 passed 2 warnings 0 failed 8 info

Registration

info

.nl country-code

Found

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

Delegation

info

dns1.ddfr.nl, dns2.ddfr.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
dns1.ddfr.nl, dns2.ddfr.nl
NS in the zone
dns1.ddfr.nl, dns2.ddfr.nl
NameserverAddressesNetwork (AS)Glue
dns1.ddfr.nl83.136.192.23 2a02:5b0:0:25::19AS35467 DDF-AS - DDFR IT Infra & Security B.V., NL AS35467 DDF-AS - DDFR IT Infra & Security B.V., NL83.136.192.23 2a02:5b0:0:25::19
dns2.ddfr.nl185.250.162.22 2a02:5b0:0:29::10AS35467 DDF-AS - DDFR IT Infra & Security B.V., NL AS35467 DDF-AS - DDFR IT Infra & Security B.V., NL185.250.162.22 2a02:5b0:0:29::10

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns1.ddfr.nl, dns2.ddfr.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.
  • i
    One address family in one network
    all IPv6 addresses are in 2a02:5b0::/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 (AS35467 (DDF-AS - DDFR IT Infra & Security 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
dns1.ddfr.nl 83.136.192.23NOERROR, 12 ms, authoritativenoyes / yesrefused-
dns1.ddfr.nl 2a02:5b0:0:25::19NOERROR, 12 ms, authoritativenoyes / yesrefused-
dns2.ddfr.nl 185.250.162.22NOERROR, 11 ms, authoritativenoyes / yesrefused-
dns2.ddfr.nl 2a02:5b0:0:29::10NOERROR, 12 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

warn

serial 2024051401 · primary dns1.ddfr.nl

Found

Primary (MNAME)
dns1.ddfr.nl
Contact (RNAME)
hostmaster.wza.nl
Serial
2024051401
Refresh / retry
3600 s / 3600 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
dns1.ddfr.nl (83.136.192.23)2024051401
dns1.ddfr.nl (2a02:5b0:0:25::19)2024051401
dns2.ddfr.nl (185.250.162.22)2024051401
dns2.ddfr.nl (2a02:5b0:0:29::10)2024051401

Checks

  • ✓ Serial 2024051401 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 1h should be shorter than refresh 1h. Current values: refresh 1h, retry 1h, expire 7d, negative TTL 1h.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.ddfr.nl is one of the listed nameservers.
  • ✓ Contact hostmaster@wza.nl #25
    The SOA RNAME hostmaster.wza.nl means hostmaster@wza.nl.
  • ✓ Date-based serial #26
    The serial 2024051401 follows the YYYYMMDDnn convention (2024-05-14).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver
no
Denial of existence
NSEC
Signatures valid until
5 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
61716ECDSAP256SHA256 (13)SHA256 262CF3BEF65E9F1C…yes

DNSKEY in the zone

Key tagRoleAlgorithm
61716KSK (257)ECDSAP256SHA256 (13)

Checks

  • !
    Signed, not validated by the resolver
    The zone is signed and has a DS record, but the resolver did not mark the answer as validated. The resolver may not validate, or the TLD is not signed.
    #27
  • ✓ DS matches a key #28
    The DS record at the parent matches a key in the zone: key tag 61716 (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.
  • 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

info

17 records at the apex

Found

Read from
83.136.192.23:53
TypeValueTTL
SOAdns1.ddfr.nl. hostmaster.wza.nl. 2024051401 3600 3600 604800 36003600
NSdns2.ddfr.nl.3599
NSdns1.ddfr.nl.3599
A20.16.85.59300
MX10 wza-nl.mail.protection.outlook.com.665
TXT"_0740jug57speh3tbtoqajf5b3geyxbz"3600
TXT"e20757964d19453501e2c521bc4a423edfecb0d925bbb68f67b02e7f90bd61db"3600
TXT"v=NTA7516-1; startdate=2025-03; enddate=2028-03; provider=zorgmail; ntamx=10 relay.zorgmail.nl"3600
TXT"hpe-greenlake-domain-verification=7a4e47484932776d3843666930722d48355a594c31455262436c625465673963"3600
TXT"c30b16f9d36034e0f99ec4a6937aa85b03c17eba9d9c5d7230a1f0d9d8473855"3600
TXT"MS=CB3D9AB46268156E43D0CE2286FA8F1346D71742"3600
TXT"ff71f0c32a37410a938cf588becdb4c0e9de255f05ed84cec5791febb0c181eb"3600
TXT"5xMpog732b4SVxh3XyasH9Oo6jxf1TP0txUw82fnVOI="3600
TXT"google-site-verification=i2rDDqhKdgHFx9ZSx2Y7AYURjl2QNxD6UhUgzt177ng"3600
TXT"v=spf1 mx ip4:193.177.232.180 ip4:34.249.196.78 ip4:34.251.157.56 ip4:34.252.27.239 ip4:35.157.154.159 ip4:35.157.187.101 include:gerritzorgnet.nl include:_spf.zorgmail.nl include:spf.protection.outlook.com include:spf.afas.online include:spf.mailjet.com " "-all"3600
TXT"apple-domain-verification=38ByxMWu5cWBscii"3600
TXT"DomainVerification=M7T7AKPKF43VRX3C8S0EOYH9KQRC4C3564TEDB8WJPOXFZDOXF0KGC357CTPTQZE"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 11m5s, NS 59m59s. The NS TTL at the parent is 1h and in the zone 59m59s; 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