Domain report: keukenhof.nl

Registration

info

.nl country-code

Found

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

Lookup error: https://rdap.sidn.nl/domain/keukenhof.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/keukenhof.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, 15 ms, authoritative	no	yes / yes	refused	-
ns1.exonet.nl 2a00:1e29:4689::53	NOERROR, 15 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 2026101501 · primary ns1.exonet.nl

Found

Primary (MNAME): ns1.exonet.nl
Contact (RNAME): hostmaster.exonet.nl
Serial: 2026101501
Refresh / retry: 10800 s / 3600 s
Expire: 604800 s
Negative TTL: 3600 s

Serial per nameserver

Nameserver	Serial
ns1.exonet.nl (45.153.18.21)	2026101501
ns1.exonet.nl (2a00:1e29:4689::53)	2026101501
ns2.exonet.nl (89.222.108.198)	2026101501
ns2.exonet.nl (2a02:6ea0:cf29::198)	2026101501
ns3.exonet.eu (178.22.63.166)	2026101501
ns3.exonet.eu (2a00:1e28:3:2304::53)	2026101501

Checks

✓ Serial 2026101501 everywhere #22

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

SOA refresh 3h, retry 1h, 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 2026101501 follows the YYYYMMDDnn convention (2026-10-15).

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: 29 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
3320	RSASHA256 (8)	SHA256 9089661AB7A6ACCE…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
3320	KSK (257)	RSASHA256 (8)
22041	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 3320 (SHA256).
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ Signatures valid until 2026-10-29 #30

The earliest DNSKEY/SOA signature expires at 2026-10-29 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. 2026101501 10800 3600 604800 3600	3600
NS	ns3.exonet.eu.	3600
NS	ns1.exonet.nl.	3600
NS	ns2.exonet.nl.	3600
A	178.22.56.17	300
AAAA	2a00:1e28:3:4781::1	2640
MX	0 keukenhof-nl.mail.protection.outlook.com.	3600
TXT	"MS=ms78733563"	3600
TXT	"facebook-domain-verification=45ljfy8utzm6zebmco41dbmu7o6g72"	3600
TXT	"google-site-verification=vIjxDSOUs-66IEDmHdtslKHo4xyl-eeOmpWOrYhVYao"	3600
TXT	"v=spf1 ip4:83.137.141.138 ip4:94.228.136.190 include:spf.protection.outlook.com ip4:167.89.80.16 include:_spf1.mailgun.org include:_spf2.mailgun.org include:_spf.eu.mailgun.org include:servers.mcsv.net include:_spf.cash.nl -all"	3600

Checks

✓ TTLs within range #32

TTLs: A 5m, AAAA 44m, 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