Domain report: rkdocumenten.nl

Registration

info

.nl country-code

Found

TLD: .nl (country-code)
ICANN policies apply: no

Lookup error: https://rdap.sidn.nl/domain/rkdocumenten.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/rkdocumenten.nl returned HTTP 429

#3

Delegation

info

ns1.exsilia.net, ns2.exsilia.net

Found

Parent zone: nl
Delegation from: ns1.dns.nl (194.0.28.53)
NS at the parent: ns1.exsilia.net, ns2.exsilia.net
NS in the zone: ns1.exsilia.net, ns2.exsilia.net

Nameserver	Addresses	Network (AS)	Glue
ns1.exsilia.net	83.137.146.53 2a01:1b0:4418::53	AS31477 DUOCAST-AS - Duocast B.V., NL AS31477 DUOCAST-AS - Duocast B.V., NL	-
ns2.exsilia.net	91.209.7.53 2a01:1b1:4418::53	AS39292 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.exsilia.net, ns2.exsilia.net.

#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: AS31477 (DUOCAST-AS - Duocast B.V., NL): 2 addresses; AS39292 (DUOCASTBACKUP-AS - Duocast B.V., NL): 2 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

pass

4 of 4 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.exsilia.net 83.137.146.53	NOERROR, 14 ms, authoritative	no	yes / yes	refused	-
ns1.exsilia.net 2a01:1b0:4418::53	NOERROR, 13 ms, authoritative	no	yes / yes	refused	-
ns2.exsilia.net 91.209.7.53	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-
ns2.exsilia.net 2a01:1b1:4418::53	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-

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 2026063001 · primary ns1.exsilia.net

Found

Primary (MNAME): ns1.exsilia.net
Contact (RNAME): hostmaster.quickhost.nl
Serial: 2026063001
Refresh / retry: 10800 s / 3600 s
Expire: 86400 s
Negative TTL: 10800 s

Serial per nameserver

Nameserver	Serial
ns1.exsilia.net (83.137.146.53)	2026063001
ns1.exsilia.net (2a01:1b0:4418::53)	2026063001
ns2.exsilia.net (91.209.7.53)	2026063001
ns2.exsilia.net (2a01:1b1:4418::53)	2026063001

Checks

✓ Serial 2026063001 everywhere #22

All nameservers serve the same version of the zone.
!

Unusual SOA timers

expire 1d is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 3h, retry 1h, expire 1d, negative TTL 3h.

#23
✓ Primary is a public nameserver #24

The primary nameserver ns1.exsilia.net is one of the listed nameservers.
✓ Contact hostmaster@quickhost.nl #25

The SOA RNAME hostmaster.quickhost.nl means hostmaster@quickhost.nl.
✓ Date-based serial #26

The serial 2026063001 follows the YYYYMMDDnn convention (2026-06-30).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC
Signatures valid until: 5 November 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
45077	RSASHA256 (8)	SHA256 AFBE805042688CA0…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
45077	KSK (257)	RSASHA256 (8)
6688	ZSK (256)	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 45077 (SHA256).
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ 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

warn

6 records at the apex

Found

Read from: 83.137.146.53:53

Type	Value	TTL
SOA	ns1.exsilia.net. hostmaster.quickhost.nl. 2026063001 10800 3600 86400 10800	86400
NS	ns1.exsilia.net.	86400
NS	ns2.exsilia.net.	86400
A	37.48.109.72	300
MX	10 cordelia.exsilia.net.	0
TXT	"v=spf1 include:_spf.exsilia.net include:_spf.google.com include:servers.mcsv.net +a +mx ~all"	86400

Checks

!

Very low TTLs

These records have a TTL below 5m, causing extra queries and slower lookups: MX (0s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 1d; 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.
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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