Domain report: houten.nl

Registration

info

.nl country-code

Found

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

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

#3

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, 11 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, 5 ms, authoritative	no	yes / yes	refused	-
ns3.cobytes.eu 193.111.32.53	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
ns3.cobytes.eu 2a0f:8cc0:0:32:53::1	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 2026100505 · primary ns1.cobytes.io

Found

Primary (MNAME): ns1.cobytes.io
Contact (RNAME): hostmaster.cobytes.com
Serial: 2026100505
Refresh / retry: 14400 s / 3600 s
Expire: 604800 s
Negative TTL: 86400 s

Serial per nameserver

Nameserver	Serial
ns1.cobytes.io (185.71.62.53)	2026100505
ns1.cobytes.io (2a03:38a0:62:53::1)	2026100505
ns2.cobytes.com (5.75.236.16)	2026100505
ns2.cobytes.com (2a01:4f8:c012:7d6b::1)	2026100505
ns3.cobytes.eu (193.111.32.53)	2026100505
ns3.cobytes.eu (2a0f:8cc0:0:32:53::1)	2026100505

Checks

✓ Serial 2026100505 everywhere #22

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

SOA refresh 4h, retry 1h, expire 7d, negative TTL 1d.
✓ Primary is a public nameserver #24

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

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

The serial 2026100505 follows the YYYYMMDDnn convention (2026-10-05).

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
30914	ECDSAP256SHA256 (13)	SHA256 C79486A8C8C804FB…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
30914	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 30914 (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

24 records at the apex

Found

Read from: 185.71.62.53:53

Type	Value	TTL
SOA	ns1.cobytes.io. hostmaster.cobytes.com. 2026100505 14400 3600 604800 86400	299
NS	ns3.cobytes.eu.	299
NS	ns2.cobytes.com.	299
NS	ns1.cobytes.io.	299
A	185.71.61.170	300
AAAA	2a03:38a0:61:170::1	300
MX	0 houten-nl.a-v1.mx.microsoft.	12
TXT	"18287d46492534317411cd3fd0682e3780c0c511b173f4f91b696049b68f77a9"	14400
TXT	"tYvjJA/hKDA0bTEo22WZmEFnC7lGk9hrdFnlV0vygxw="	300
TXT	"MS=ms77535974"	300
TXT	"apple-domain-verification=hVOEsW5KWkhnVWpn"	300
TXT	"v=DKIM1; g=*; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDA/zibhCl3CdqPgTN0I0Y2DsKK7lfrfIr3OyfiVVqPtGgRqZnpqwHlNXOcGmy+b3qvgt0pw02l+s95Hyk0Sqtww40 apXU5KRUIg9V2IUTYAvCDBsYDJG9qxsW42gDJY3XYlhTbW0N2e0DR2GHfjwfRGPHG4mTGXZ6orO7KEWsRPwIDAQAB;"	300
TXT	"v=spf1 include:spf.protection.outlook.com include:_spf.cobytes.email include:spf.protection.outlook.com include:_spf.services.centric.eu include:_spf.zivver.com include:spf.eprov.nl include:spf.simgroephosting.nl include:_spf.emply.com include:spf.mailjet" ".com include:spf2.houten.nl ip4:213.206.209.14 -all"	300
TXT	"brevo-code:3ff469f7d4862443a10fe4fd47070b3c"	3600
TXT	"facebook-domain-verification=sjrn2u6spe8893ec19kdg7kp2m244k"	300
TXT	"zikHwtrbfY0Eran0u4wcL30caN5tgGAivYeEuL9S5PjKmFIEuu1q8CNR+vtFfqasrMG4AEYpncQpsQfGykdvXA=="	300
CAA	0 issue "globalsign.com"	300
CAA	0 issue "kpn.com"	300
CAA	0 issue "digicert.com"	300
CAA	0 issue "godaddy.com"	300
CAA	0 issue "letsencrypt.org"	300
CAA	0 issue "comodoca.com"	300
CAA	0 issue "www.pkioverheid.nl"	300
CAA	0 issue "sectigo.com"	300

Checks

!

Very low TTLs

These records have a TTL below 5m, causing extra queries and slower lookups: MX (12s), NS (4m59s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 4m59s; resolvers may use either.

#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: globalsign.com, kpn.com, digicert.com, godaddy.com, letsencrypt.org, comodoca.com, www.pkioverheid.nl, sectigo.com.