Domain report: schouwen-duiveland.nl

Registration

info

.nl country-code

Found

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

Lookup error: https://rdap.sidn.nl/domain/schouwen-duiveland.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/schouwen-duiveland.nl returned HTTP 429

#3

Delegation

warn

ns1.deltazakelijk.nl, ns2.deltazakelijk.nl

Found

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

Nameserver	Addresses	Network (AS)	Glue
ns1.deltazakelijk.nl	109.109.120.8 2a02:988::8	AS30925 SPEEDXS-AS - DELTA Fiber Nederland B.V., NL AS30925 SPEEDXS-AS - DELTA Fiber Nederland B.V., NL	-
ns2.deltazakelijk.nl	109.109.120.88 2a02:988::88	AS30925 SPEEDXS-AS - DELTA Fiber Nederland B.V., NL AS30925 SPEEDXS-AS - DELTA Fiber Nederland B.V., NL	-

Checks

i

2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.deltazakelijk.nl, ns2.deltazakelijk.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 one network

all IPv4 addresses are in 109.109.120.0/24; all IPv6 addresses are in 2a02:988::/48. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).

#10
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS30925 (SPEEDXS-AS - DELTA Fiber Nederland 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
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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

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.deltazakelijk.nl 109.109.120.8	NOERROR, 15 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.8.4 (built Feb 6 2024 20:17:27 by mockbuild@localhost)
ns1.deltazakelijk.nl 2a02:988::8	no response	no	no / no	-	-
ns2.deltazakelijk.nl 109.109.120.88	NOERROR, 14 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.8.4 (built Feb 6 2024 20:17:27 by mockbuild@localhost)
ns2.deltazakelijk.nl 2a02:988::88	NOERROR, 10 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.8.4 (built Feb 6 2024 20:17:27 by mockbuild@localhost)

Checks

✗

Nameservers not responding

These addresses did not answer, so resolvers waste time on timeouts: ns1.deltazakelijk.nl (2a02:988::8): read udp [2a01:4f8:1c1c:eebf::1]:43330->[2a02:988::8]:53: i/o timeout.

#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.deltazakelijk.nl: "PowerDNS Authoritative Server 4.8.4 (built Feb 6 2024 20:17:27 by mockbuild@localhost)"; ns2.deltazakelijk.nl: "PowerDNS Authoritative Server 4.8.4 (built Feb 6 2024 20:17:27 by mockbuild@localhost)". 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 1789382424 · primary ns1.deltazakelijk.nl

Found

Primary (MNAME): ns1.deltazakelijk.nl
Contact (RNAME): hostmaster.zeelandnet.nl
Serial: 1789382424
Refresh / retry: 10800 s / 3600 s
Expire: 1209600 s
Negative TTL: 10800 s

Serial per nameserver

Nameserver	Serial
ns1.deltazakelijk.nl (109.109.120.8)	1789382424
ns2.deltazakelijk.nl (109.109.120.88)	1789382424
ns2.deltazakelijk.nl (2a02:988::88)	1789382424

Checks

✓ Serial 1789382424 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 3h, retry 1h, expire 14d, negative TTL 3h.
✓ Primary is a public nameserver #24

The primary nameserver ns1.deltazakelijk.nl is one of the listed nameservers.
✓ Contact hostmaster@zeelandnet.nl #25

The SOA RNAME hostmaster.zeelandnet.nl means hostmaster@zeelandnet.nl.
✓ Timestamp serial #26

The serial 1789382424 is a Unix timestamp (2026-09-14 10:40 UTC).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC
Signatures valid until: 6 November 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
38029	RSASHA256 (8)	SHA256 B982D83A896C4405…	yes
53734	RSASHA256 (8)	SHA256 B6DA1ADF930042FE…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
13360	ZSK (256)	RSASHA256 (8)
1905	ZSK (256)	RSASHA256 (8)
34978	ZSK (256)	RSASHA256 (8)
38029	KSK (257)	RSASHA256 (8)
53734	KSK (257)	RSASHA256 (8)
42226	KSK (257)	RSASHA256 (8)
60037	KSK (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 38029 (SHA256), key tag 53734 (SHA256).
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ Signatures valid until 2026-11-06 #30

The earliest DNSKEY/SOA signature expires at 2026-11-06 09:23 UTC.
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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

14 records at the apex

Found

Read from: 109.109.120.8:53

Type	Value	TTL
SOA	ns1.deltazakelijk.nl. hostmaster.zeelandnet.nl. 1789382424 10800 3600 1209600 10800	297
NS	ns2.deltazakelijk.nl.	0
NS	ns1.deltazakelijk.nl.	0
A	185.71.61.23	300
AAAA	2a03:38a0:61:23::1	300
MX	10 spamfilter.ezorg.nl.	300
MX	40 spamfilter03.ezorg.nl.	300
MX	30 spamfilter02.ezorg.nl.	300
MX	20 spamfilter01.ezorg.nl.	300
TXT	"uBFlXZvEnEUn2gDxGKh1Ey94I82N7bDueiBN1ThPn2vfVJHBel7egOmo30kyN6LYzqjCM/ZcvPd+TOyVwQZaqA=="	10
TXT	"openai-domain-verification=dv-oFieMf3WCRn1MP778z0352sx"	10
TXT	"apple-domain-verification=gtOxaedHIlbmQZfO"	10
TXT	"v=spf1 include:_spf.services.centric.eu include:_spf.ezorg.nl include:spf.protection.outlook.com include:_spf.cobytes.email include:spf.simgroephosting.nl include:spf.estrategy-apps.nl ip4:212.115.202.43 ip4:92.42.235.1/24 ip4:185.136.64.128/27 ip4:185.13" "6.65.128/27 ip4:168.245.100.0 ip4:45.152.251.0/24 ip4:91.247.184.0/24 ip4:161.51.101.0/24 ip4:188.241.247.0/24 ip4:195.20.144.0/24 -all"	10
TXT	"MS=ms41578294"	10

Checks

!

Very low TTLs

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