Domain report: duurzaam-ondernemen.nl

Registration

info

.nl country-code

Found

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

Lookup error: https://rdap.sidn.nl/domain/duurzaam-ondernemen.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/duurzaam-ondernemen.nl returned HTTP 429

#3

Delegation

pass

ns1.greenhost.nl, ns2.greenhost.net, ns3.greenhost.nl

Found

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

Nameserver	Addresses	Network (AS)	Glue
ns1.greenhost.nl	213.108.104.200 2a00:c6c0:0:107::53	AS47172 Greenhost - Greenhost BV, NL AS47172 Greenhost - Greenhost BV, NL	213.108.104.200 2a00:c6c0:0:107::53
ns2.greenhost.net	51.210.125.146 206.81.31.94 2001:41d0:304:100::3d1d 2a03:b0c0:3:d0::10fc:6001	AS16276 OVH - OVH SAS, FR AS14061 DIGITALOCEAN-ASN - DigitalOcean, LLC, US AS16276 OVH - OVH SAS, FR AS14061 DIGITALOCEAN-ASN - DigitalOcean, LLC, US	-
ns3.greenhost.nl	78.47.187.201 2a01:4f8:c0c:2324::1	AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE	78.47.187.201 2a01:4f8:c0c:2324::1

Checks

✓ 3 nameservers #6

Delegated to ns1.greenhost.nl, ns2.greenhost.net, ns3.greenhost.nl.
✓ 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 4 IPv4 /24s and 4 IPv6 /48s.
✓ 4 autonomous systems #11

The nameservers are spread over: AS14061 (DIGITALOCEAN-ASN - DigitalOcean, LLC, US): 2 addresses; AS16276 (OVH - OVH SAS, FR): 2 addresses; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 2 addresses; AS47172 (Greenhost - Greenhost BV, NL): 2 addresses.
✓ Nameserver names under 2 TLDs #12

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

Every nameserver has an IPv6 address.

Nameservers

warn

8 of 8 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.greenhost.nl 213.108.104.200	NOERROR, 11 ms, authoritative	no	yes / yes	refused	Knot DNS 3.6.0
ns1.greenhost.nl 2a00:c6c0:0:107::53	NOERROR, 10 ms, authoritative	no	yes / yes	refused	Knot DNS 3.6.0
ns2.greenhost.net 51.210.125.146	NOERROR, 18 ms, authoritative	no	yes / yes	refused	Knot DNS 3.6.0
ns2.greenhost.net 206.81.31.94	NOERROR, 7 ms, authoritative	no	yes / yes	refused	Knot DNS 3.6.0
ns2.greenhost.net 2001:41d0:304:100::3d1d	NOERROR, 18 ms, authoritative	no	yes / yes	refused	Knot DNS 3.6.0
ns2.greenhost.net 2a03:b0c0:3:d0::10fc:6001	NOERROR, 6 ms, authoritative	no	yes / yes	refused	Knot DNS 3.6.0
ns3.greenhost.nl 78.47.187.201	NOERROR, 3 ms, authoritative	no	yes / yes	refused	Knot DNS 3.5.6
ns3.greenhost.nl 2a01:4f8:c0c:2324::1	NOERROR, 3 ms, authoritative	no	yes / yes	refused	Knot DNS 3.5.6

Checks

✓ All respond #14

All 8 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.
!

Software version disclosed

These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.greenhost.nl: "Knot DNS 3.6.0"; ns2.greenhost.net: "Knot DNS 3.6.0"; ns3.greenhost.nl: "Knot DNS 3.5.6". 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 1724773691 · primary ns1.greenhost.nl

Found

Primary (MNAME): ns1.greenhost.nl
Contact (RNAME): hostmaster.duurzaam-ondernemen.nl
Serial: 1724773691
Refresh / retry: 14400 s / 7200 s
Expire: 2419200 s
Negative TTL: 86400 s

Serial per nameserver

Nameserver	Serial
ns1.greenhost.nl (213.108.104.200)	1724773691
ns1.greenhost.nl (2a00:c6c0:0:107::53)	1724773691
ns2.greenhost.net (51.210.125.146)	1724773691
ns2.greenhost.net (206.81.31.94)	1724773691
ns2.greenhost.net (2001:41d0:304:100::3d1d)	1724773691
ns2.greenhost.net (2a03:b0c0:3:d0::10fc:6001)	1724773691
ns3.greenhost.nl (78.47.187.201)	1724773691
ns3.greenhost.nl (2a01:4f8:c0c:2324::1)	1724773691

Checks

✓ Serial 1724773691 everywhere #22

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

SOA refresh 4h, retry 2h, expire 28d, negative TTL 1d.
✓ Primary is a public nameserver #24

The primary nameserver ns1.greenhost.nl is one of the listed nameservers.
✓ Contact hostmaster@duurzaam-ondernemen.nl #25

The SOA RNAME hostmaster.duurzaam-ondernemen.nl means hostmaster@duurzaam-ondernemen.nl.
✓ Timestamp serial #26

The serial 1724773691 is a Unix timestamp (2024-08-27 15:48 UTC).

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
35335	RSASHA256 (8)	SHA256 F6BB612FC4FDB9F9…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
20244	ZSK (256)	RSASHA256 (8)
33685	ZSK (256)	ECDSAP256SHA256 (13)
35335	KSK (257)	RSASHA256 (8)
42638	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 35335 (SHA256).
✓ Modern algorithms #29

Key algorithms: ECDSAP256SHA256 (13), RSASHA256 (8).
✓ Signatures valid until 2026-10-29 #30

The earliest DNSKEY/SOA signature expires at 2026-10-29 12:00 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

info

8 records at the apex

Found

Read from: 213.108.104.200:53

Type	Value	TTL
SOA	ns1.greenhost.nl. hostmaster.duurzaam-ondernemen.nl. 1724773691 14400 7200 2419200 86400	3600
NS	ns1.greenhost.nl.	3600
NS	ns2.greenhost.net.	3600
NS	ns3.greenhost.nl.	3600
A	213.108.104.109	3600
MX	10 mx1.greenhost.nl.	3600
MX	10 mx2.greenhost.nl.	3600
TXT	"v=spf1 include:spf.greenhost.nl ~all"	3600

Checks

✓ TTLs within range #32

TTLs: A 1h, MX 1h, NS 1h.
✓ 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