ltonoord.nl

Checked 22 October 2026, 14:11 UTC · via 8.8.8.8
✗Problems found
22 passed 2 warnings 2 failed 6 info

Registration

info

.nl country-code

Found

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

Delegation

warn

ns1.quickhost.nl, ns2.quickhost.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.quickhost.nl, ns2.quickhost.nl
NS in the zone
ns1.duocast.net, ns2.duocast.net
NameserverAddressesNetwork (AS)Glue
ns1.duocast.net (zone only)83.137.146.53 2a01:1b0:4418::53AS31477 DUOCAST-AS - Duocast B.V., NL AS31477 DUOCAST-AS - Duocast B.V., NL-
ns1.quickhost.nl (parent only)83.137.146.53 2a01:1b0:4418::53AS31477 DUOCAST-AS - Duocast B.V., NL AS31477 DUOCAST-AS - Duocast B.V., NL-
ns2.duocast.net (zone only)91.209.7.53 2a01:1b1:4418::53AS39292 DUOCASTBACKUP-AS - Duocast B.V., NL AS39292 DUOCASTBACKUP-AS - Duocast B.V., NL-
ns2.quickhost.nl (parent only)91.209.7.53 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.quickhost.nl, ns2.quickhost.nl.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns1.quickhost.nl, ns2.quickhost.nl; only in the zone: ns1.duocast.net, ns2.duocast.net. ns1.duocast.net, ns1.quickhost.nl, ns2.duocast.net, ns2.quickhost.nl report NS ns1.duocast.net ns2.duocast.net.
    #7
  • ✓ 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): 4 addresses; AS39292 (DUOCASTBACKUP-AS - Duocast B.V., NL): 4 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

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.duocast.net 83.137.146.53NOERROR, 14 ms, authoritativenoyes / yesrefused-
ns1.duocast.net 2a01:1b0:4418::53NOERROR, 13 ms, authoritativenono / yesrefused-
ns1.quickhost.nl 83.137.146.53NOERROR, 14 ms, authoritativenoyes / yesrefused-
ns1.quickhost.nl 2a01:1b0:4418::53NOERROR, 13 ms, authoritativenono / yesrefused-
ns2.duocast.net 91.209.7.53NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns2.duocast.net 2a01:1b1:4418::53NOERROR, 12 ms, authoritativenono / yesrefused-
ns2.quickhost.nl 91.209.7.53NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns2.quickhost.nl 2a01:1b1:4418::53NOERROR, 13 ms, authoritativenono / yesrefused-

Checks

  • ✓ All respond #14
    All 8 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: ns1.duocast.net (2a01:1b0:4418::53): read tcp [2a01:4f8:1c1c:eebf::1]:60692->[2a01:1b0:4418::53]:53: read: connection reset by peer; ns1.quickhost.nl (2a01:1b0:4418::53): read tcp [2a01:4f8:1c1c:eebf::1]:60686->[2a01:1b0:4418::53]:53: read: connection reset by peer; ns2.duocast.net (2a01:1b1:4418::53): read tcp [2a01:4f8:1c1c:eebf::1]:38848->[2a01:1b1:4418::53]:53: read: connection reset by peer; ns2.quickhost.nl (2a01:1b1:4418::53): read tcp [2a01:4f8:1c1c:eebf::1]:38844->[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

fail

serial 2026082402 · primary ns1.duocast.net

Found

Primary (MNAME)
ns1.duocast.net
Contact (RNAME)
hostmaster\@duocast.net
Serial
2026082402
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.duocast.net (83.137.146.53)2026082402
ns1.duocast.net (2a01:1b0:4418::53)2026082402
ns1.quickhost.nl (83.137.146.53)2026082402
ns1.quickhost.nl (2a01:1b0:4418::53)2026082402
ns2.duocast.net (91.209.7.53)2026082402
ns2.duocast.net (2a01:1b1:4418::53)2026082402
ns2.quickhost.nl (91.209.7.53)2026082402
ns2.quickhost.nl (2a01:1b1:4418::53)2026082402

Checks

  • ✓ Serial 2026082402 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.duocast.net is one of the listed nameservers.
  • ✗
    Invalid contact address
    The SOA RNAME "hostmaster\\@duocast.net" contains an @; it must be written with a dot instead (hostmaster.example.com).
    #25
  • ✓ Date-based serial #26
    The serial 2026082402 follows the YYYYMMDDnn convention (2026-08-24).

DNSSEC

warn

Signed, but no DS at parent

Found

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

DNSKEY in the zone

Key tagRoleAlgorithm
31865KSK (257)ECDSAP256SHA256 (13)

Checks

  • !
    Signed but not delegated securely
    The zone is signed but the parent has no DS record, so the signatures are not used. Publish the DS record at your registrar.
    #27
  • ✓ 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

14 records at the apex

Found

Read from
83.137.146.53:53
TypeValueTTL
SOAns1.duocast.net. hostmaster\@duocast.net. 2026082402 10800 3600 604800 864003600
NSns2.duocast.net.3600
NSns1.duocast.net.3600
A31.7.2.1553600
AAAA2a03:9700:8000:0:afe4:ba49:2aaa:c19a3600
MX0 ltonoord-nl.mail.protection.outlook.com.3600
TXT"google-site-verification=Qxkcz-PNphcavnejthvlCbpxYuqxjAvxpz1bCG2ULU0"3600
TXT"5df67b0e3edf30dcd11c4be8df186c19"3600
TXT"MS=ms98251209"3600
TXT"facebook-domain-verification=qkuepzyj2vvo9mbuz5u08bs8kfpn31"3600
TXT"sophos-domain-verification=13602e353995c27454caca2c2ac6a754b1e5405e53a4edc80ce652a035db4592"3600
TXT"ZOOM_verify_6DJitWksSvCW-r54kn5vqA"3600
TXT"BPL=7845376"3600
TXT"v=spf1 include:survey.businessmonitor.nl a:malengo.exception.mx a:hmail.jitbit.com include:spf.afas.online include:spf.protection.outlook.com include:spf.mediars.org ~all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, AAAA 1h, MX 1h, NS 1h.
  • ✓ 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