Domain report: knhb.nl

Registration

info

.nl country-code

Found

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

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

#3

Delegation

pass

ns1.exonet.nl, ns2.exonet.nl, ns3.exonet.eu

Found

Parent zone: nl
Delegation from: ns1.dns.nl (194.0.28.53)
NS at the parent: ns1.exonet.nl, ns2.exonet.nl, ns3.exonet.eu
NS in the zone: ns1.exonet.nl, ns2.exonet.nl, ns3.exonet.eu

Nameserver	Addresses	Network (AS)	Glue
ns1.exonet.nl	45.153.18.21 2a00:1e29:4689::53	AS49544 i3Dnet - i3D.net B.V, NL AS49544 i3Dnet - i3D.net B.V, NL	45.153.18.21 2a00:1e29:4689::53
ns2.exonet.nl	89.222.108.198 2a02:6ea0:cf29::198	AS60068 CDN77 - Datacamp Limited, GB AS60068 CDN77 - Datacamp Limited, GB	89.222.108.198 2a02:6ea0:cf29::198
ns3.exonet.eu	178.22.63.166 2a00:1e28:3:2304::53	AS12859 NL-BIT - BIT BV, NL AS12859 NL-BIT - BIT BV, NL	-

Checks

✓ 3 nameservers #6

Delegated to ns1.exonet.nl, ns2.exonet.nl, ns3.exonet.eu.
✓ 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 3 IPv4 /24s and 3 IPv6 /48s.
✓ 3 autonomous systems #11

The nameservers are spread over: AS12859 (NL-BIT - BIT BV, NL): 2 addresses; AS49544 (i3Dnet - i3D.net B.V, NL): 2 addresses; AS60068 (CDN77 - Datacamp Limited, GB): 2 addresses.
✓ Nameserver names under 2 TLDs #12

Nameserver names use the TLDs .eu, .nl.
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

Nameservers

pass

6 of 6 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.exonet.nl 45.153.18.21	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
ns1.exonet.nl 2a00:1e29:4689::53	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
ns2.exonet.nl 89.222.108.198	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-
ns2.exonet.nl 2a02:6ea0:cf29::198	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-
ns3.exonet.eu 178.22.63.166	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
ns3.exonet.eu 2a00:1e28:3:2304::53	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-

Checks

✓ All respond #14

All 6 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

pass

serial 2026102201 · primary ns1.exonet.nl

Found

Primary (MNAME): ns1.exonet.nl
Contact (RNAME): hostmaster.exonet.nl
Serial: 2026102201
Refresh / retry: 28800 s / 7200 s
Expire: 604800 s
Negative TTL: 3600 s

Serial per nameserver

Nameserver	Serial
ns1.exonet.nl (45.153.18.21)	2026102201
ns1.exonet.nl (2a00:1e29:4689::53)	2026102201
ns2.exonet.nl (89.222.108.198)	2026102201
ns2.exonet.nl (2a02:6ea0:cf29::198)	2026102201
ns3.exonet.eu (178.22.63.166)	2026102201
ns3.exonet.eu (2a00:1e28:3:2304::53)	2026102201

Checks

✓ Serial 2026102201 everywhere #22

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

SOA refresh 8h, retry 2h, expire 7d, negative TTL 1h.
✓ Primary is a public nameserver #24

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

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

The serial 2026102201 follows the YYYYMMDDnn convention (2026-10-22).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 0 iterations, 8-byte salt
Signatures valid until: 5 November 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
34015	RSASHA256 (8)	SHA256 65567A9E2B38A2CC…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
34015	KSK (257)	RSASHA256 (8)
6223	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 34015 (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.
!

NSEC3 with extra iterations or salt

NSEC3 uses 0 iterations and a 8-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.

#31

Records

info

11 records at the apex

Found

Read from: 45.153.18.21:53

Type	Value	TTL
SOA	ns1.exonet.nl. hostmaster.exonet.nl. 2026102201 28800 7200 604800 3600	3599
NS	ns2.exonet.nl.	3599
NS	ns3.exonet.eu.	3599
NS	ns1.exonet.nl.	3599
A	178.22.59.83	300
AAAA	2a00:1e28:3:a079::1	300
MX	10 knhb-nl.mail.protection.outlook.com.	3600
TXT	"v=spf1 include:spf.protection.outlook.com include:_spf.exonet.nl include:spf.mandrillapp.com include:mail.zendesk.com include:emsd1.com include:survey.businessmonitor.nl ip4:87.251.42.101 ip4:87.251.42.98 ip4:52.178.135.21 ip4:54.217.213.165 ip4:93.117.23" "8.116 ip4:195.72.122.163 ip4:213.206.122.137 ip4:64.225.67.123 ip4:87.233.11.36 ip4:87.233.11.37 ip4:87.233.11.50 ip4:62.177.173.224/29 ip4:213.133.55.16/29 ~all"	3600
TXT	"MS=ms55301339"	3600
TXT	"MS=ms43892924"	3600
TXT	"_ah1kkpgbidf4lgm4qyj22tyi06r5cq5"	3600

Checks

✓ TTLs within range #32

TTLs: A 5m, AAAA 5m, MX 1h, 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.
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