Domain report: hetnieuweinstituut.nl

Registration

info

.nl country-code

Found

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

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

#3

Delegation

warn

ns01.on.ek.co, ns02.on.ek.co

Found

Parent zone: nl
Delegation from: ns1.dns.nl (194.0.28.53)
NS at the parent: ns01.on.ek.co, ns02.on.ek.co
NS in the zone: ns01.on.ek.co, ns02.on.ek.co

Nameserver	Addresses	Network (AS)	Glue
ns01.on.ek.co	194.180.219.10	AS199816 AS-Ekco-GAS - Ekco B.V., NL	-
ns02.on.ek.co	217.77.129.10	AS12902 LUNA - Ekco B.V., NL	-

Checks

i

2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns01.on.ek.co, ns02.on.ek.co.

#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 0 IPv6 /48s.
✓ 2 autonomous systems #11

The nameservers are spread over: AS12902 (LUNA - Ekco B.V., NL): 1 address; AS199816 (AS-Ekco-GAS - Ekco B.V., NL): 1 address.
i

All nameserver names under .co

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
!

No IPv6

None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.

#13

Nameservers

info

2 of 2 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns01.on.ek.co 194.180.219.10	NOERROR, 11 ms, authoritative	no	yes / yes	refused	Ekco Distributed DNS NL-AMS
ns02.on.ek.co 217.77.129.10	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-

Checks

✓ All respond #14

All 2 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.
i

Identifying string disclosed

These nameservers answer version queries with a string that is not a version number: ns01.on.ek.co: "Ekco Distributed DNS NL-AMS".

#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

warn

serial 2026040501 · primary ns01.on.ek.co

Found

Primary (MNAME): ns01.on.ek.co
Contact (RNAME): hostmaster.on.ek.co
Serial: 2026040501
Refresh / retry: 10800 s / 3600 s
Expire: 3600 s
Negative TTL: 604800 s

Serial per nameserver

Nameserver	Serial
ns01.on.ek.co (194.180.219.10)	2026040501
ns02.on.ek.co (217.77.129.10)	2026040501

Checks

✓ Serial 2026040501 everywhere #22

All nameservers serve the same version of the zone.
!

Unusual SOA timers

expire 1h is shorter than 7d; secondaries stop answering too soon when the primary is down; expire 1h must be longer than refresh + retry; negative caching TTL (minimum) 7d is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 3h, retry 1h, expire 1h, negative TTL 7d.

#23
✓ Primary is a public nameserver #24

The primary nameserver ns01.on.ek.co is one of the listed nameservers.
✓ Contact hostmaster@on.ek.co #25

The SOA RNAME hostmaster.on.ek.co means hostmaster@on.ek.co.
✓ Date-based serial #26

The serial 2026040501 follows the YYYYMMDDnn convention (2026-04-05).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC
Signatures valid until: 29 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
19912	ECDSAP256SHA256 (13)	SHA256 FF5D94B6F6DC228F…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
19912	KSK (257)	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 19912 (SHA256).
✓ Modern algorithms #29

Key algorithms: ECDSAP256SHA256 (13).
✓ Signatures valid until 2026-10-29 #30

The earliest DNSKEY/SOA signature expires at 2026-10-29 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

9 records at the apex

Found

Read from: 194.180.219.10:53

Type	Value	TTL
SOA	ns01.on.ek.co. hostmaster.on.ek.co. 2026040501 10800 3600 3600 604800	3600
NS	ns02.on.ek.co.	3600
NS	ns01.on.ek.co.	3600
A	75.2.60.5	30
MX	10 hetnieuweinstituut-nl.mail.protection.outlook.com.	3600
TXT	"v=spf1 a mx ip4:31.3.101.87 ip4:141.138.193.31 ip4:141.138.192.15 ip4:195.93.224.251 ip4:141.138.197.120 ip4:141.138.204.89 include:spf.protection.outlook.com include:spf.jewellabs.net include:relay.mailchannels.net include:servers.mcsv.net -all"	60
TXT	"MS=ms46222780"	60
TXT	"apple-domain-verification=fBLbAeN247r3D0B0"	60
TXT	"google-site-verification=ahvmIg4juBI3s9YIK3U37xf4pGy6JnMTjgVVYHooKqo"	60

Checks

!

Very low TTLs

These records have a TTL below 5m, causing extra queries and slower lookups: A (30s). Low TTLs are useful just before a planned change.

#32
✓ No CNAME at the apex #33

The zone apex has no CNAME record.
i

Wildcard record

A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.

#34
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