Domain report: katwijk.nl

Registration

info

.nl country-code · RegistrarHub

Found

TLD: .nl (country-code)
ICANN policies apply: no
Registrar: RegistrarHub
Registered: 3 November 1999
Last changed: 23 June 2026
Status: active
Registry nameservers: ns1.cobytes.io, ns2.cobytes.com, ns3.cobytes.eu
RDAP server: https://rdap.sidn.nl/

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

Expiry date not published

The registry does not publish the expiry date in RDAP. Check it with your registrar.

#3
i

No transfer lock

The domain has no transfer lock (status: active). A registrar lock protects against unauthorized transfers.

#4
✓ Registry and delegation match #5

The nameservers registered at the registry are the ones published in DNS.

Delegation

pass

ns1.cobytes.io, ns2.cobytes.com, ns3.cobytes.eu

Found

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

Nameserver	Addresses	Network (AS)	Glue
ns1.cobytes.io	185.71.62.53 2a03:38a0:62:53::1	AS201191 COBYTES - Cobytes B.V., NL AS201191 COBYTES - Cobytes B.V., NL	-
ns2.cobytes.com	5.75.236.16 2a01:4f8:c012:7d6b::1	AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE	-
ns3.cobytes.eu	193.111.32.53 2a0f:8cc0:0:32:53::1	AS211895 Serverius-Users-as - Serverius Holding B.V., NL AS211895 Serverius-Users-as - Serverius Holding B.V., NL	-

Checks

✓ 3 nameservers #6

Delegated to ns1.cobytes.io, ns2.cobytes.com, ns3.cobytes.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: AS201191 (COBYTES - Cobytes B.V., NL): 2 addresses; AS211895 (Serverius-Users-as - Serverius Holding B.V., NL): 2 addresses; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 2 addresses.
✓ Nameserver names under 3 TLDs #12

Nameserver names use the TLDs .com, .eu, .io.
✓ 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.cobytes.io 185.71.62.53	NOERROR, 10 ms, authoritative	no	yes / yes	refused	-
ns1.cobytes.io 2a03:38a0:62:53::1	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
ns2.cobytes.com 5.75.236.16	NOERROR, 5 ms, authoritative	no	yes / yes	refused	-
ns2.cobytes.com 2a01:4f8:c012:7d6b::1	NOERROR, 6 ms, authoritative	no	yes / yes	refused	-
ns3.cobytes.eu 193.111.32.53	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-
ns3.cobytes.eu 2a0f:8cc0:0:32:53::1	NOERROR, 12 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 2026082002 · primary ns1.cobytes.io

Found

Primary (MNAME): ns1.cobytes.io
Contact (RNAME): hostmaster.cobytes.io
Serial: 2026082002
Refresh / retry: 14400 s / 3600 s
Expire: 1209600 s
Negative TTL: 86400 s

Serial per nameserver

Nameserver	Serial
ns1.cobytes.io (185.71.62.53)	2026082002
ns1.cobytes.io (2a03:38a0:62:53::1)	2026082002
ns2.cobytes.com (5.75.236.16)	2026082002
ns2.cobytes.com (2a01:4f8:c012:7d6b::1)	2026082002
ns3.cobytes.eu (193.111.32.53)	2026082002
ns3.cobytes.eu (2a0f:8cc0:0:32:53::1)	2026082002

Checks

✓ Serial 2026082002 everywhere #22

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

SOA refresh 4h, retry 1h, expire 14d, negative TTL 1d.
✓ Primary is a public nameserver #24

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

The SOA RNAME hostmaster.cobytes.io means hostmaster@cobytes.io.
✓ Date-based serial #26

The serial 2026082002 follows the YYYYMMDDnn convention (2026-08-20).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 0 iterations, 0-byte salt
Signatures valid until: 29 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
1018	ECDSAP256SHA256 (13)	SHA256 67B5D534270EEA06…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
1018	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 1018 (SHA256).
✓ Modern algorithms #29

Key algorithms: ECDSAP256SHA256 (13).
!

Signatures expire soon

The earliest signature expires at 2026-10-29 00:00 UTC (in 154h0m0s). Check that automatic re-signing works.

#30
✓ NSEC3 as recommended #31

The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

warn

19 records at the apex

Found

Read from: 185.71.62.53:53

Type	Value	TTL
SOA	ns1.cobytes.io. hostmaster.cobytes.io. 2026082002 14400 3600 1209600 86400	86400
NS	ns3.cobytes.eu.	3600
NS	ns2.cobytes.com.	3600
NS	ns1.cobytes.io.	3600
A	185.71.61.49	813
AAAA	2a03:38a0:61:49::1	1152
MX	10 katwijk-nl.b-v1.mx.microsoft.	109
TXT	"apple-domain-verification=l93MOnGHW4iRMCVy"	3600
TXT	"v=NTA7516-1;startdate=2019-06;enddate=2029-09;provider=bastionic;ntamx=10 mx.bastion365.net"	3600
TXT	"MS=ms60997211"	3600
TXT	"jE+0Ae2qTKZ9tFzf/GjIqNeFTXkO2BRmWtYtO6ZdOZ+qIRYlhKqXqDmhj0te5fJM6fzF48Vsw8MTrU7VceIniw=="	3600
TXT	"bastion365-domain-validation=971113a284843"	3600
TXT	"v=spf1 a include:spf.eprov.eu ip4:87.213.102.126 ip4:87.249.113.154 include:spf.simgroephosting.nl include:_spf.services.centric.eu include:spf.protection.outlook.com include:_spf.mail.services.bastion365.net ip4:185.136.64.128/27 ip4:185.136.65.128/27 in" "clude:_spf.cobytes.email include:spf.pinkprivate.cloud ip4:185.46.182.0/24 ip4:185.46.182.208/31 include:spf.planoncloud.com -all"	3600
CAA	0 issue "digicert.com"	3600
CAA	0 issue "letsencrypt.org"	3600
CAA	0 issue "sectigo.com"	3600
CAA	0 issue "certsign.ro"	3600
CAA	0 iodef "mailto:abuse@katwijk.nl"	3600
CAA	0 issuevmc "digicert.com"	3600

Checks

!

Very low TTLs

These records have a TTL below 5m, causing extra queries and slower lookups: MX (1m49s). Low TTLs are useful just before a planned change.

#32
✓ No CNAME at the apex #33

The zone apex has no CNAME record.
✓ No wildcard #34

Names that don't exist return NXDOMAIN.
✓ CAA restricts issuance #35

Certificates may be issued by: digicert.com, letsencrypt.org, sectigo.com, certsign.ro.