Domain report: zuid-holland.nl

Registration

info

.nl country-code

Found

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

Lookup error: https://rdap.sidn.nl/domain/zuid-holland.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/zuid-holland.nl returned HTTP 429

#3

Delegation

pass

ns.internlnet.nl, ns3.internl.net, ns4.internl.net

Found

Parent zone: nl
Delegation from: ns1.dns.nl (194.0.28.53)
NS at the parent: ns.internlnet.nl, ns3.internl.net, ns4.internl.net
NS in the zone: ns.internlnet.nl, ns3.internl.net, ns4.internl.net

Nameserver	Addresses	Network (AS)	Glue
ns.internlnet.nl	31.3.105.132 2a03:7900:105:31:3:105:138:1	AS197731 TUXIS - The Internet Engineering Group B.V., NL AS197731 TUXIS - The Internet Engineering Group B.V., NL	-
ns3.internl.net	77.95.248.203 2a00:1478:20:6:4:862:0:1	AS43190 GL-IX-AS - Totaalnet Internet Works B.V., NL AS43190 GL-IX-AS - Totaalnet Internet Works B.V., NL	-
ns4.internl.net	85.119.243.17 2a00:e760:100:0:f:1247:0:1	AS8368 DSTNY-BACKBONE - Dstny BE N.V., BE AS8368 DSTNY-BACKBONE - Dstny BE N.V., BE	-

Checks

✓ 3 nameservers #6

Delegated to ns.internlnet.nl, ns3.internl.net, ns4.internl.net.
✓ 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: AS197731 (TUXIS - The Internet Engineering Group B.V., NL): 2 addresses; AS43190 (GL-IX-AS - Totaalnet Internet Works B.V., NL): 2 addresses; AS8368 (DSTNY-BACKBONE - Dstny BE N.V., BE): 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

info

6 of 6 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns.internlnet.nl 31.3.105.132	NOERROR, 12 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns.internlnet.nl 2a03:7900:105:31:3:105:138:1	NOERROR, 13 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns3.internl.net 77.95.248.203	NOERROR, 10 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns3.internl.net 2a00:1478:20:6:4:862:0:1	NOERROR, 14 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns4.internl.net 85.119.243.17	NOERROR, 12 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns4.internl.net 2a00:e760:100:0:f:1247:0:1	NOERROR, 15 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/

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.
i

Identifying string disclosed

These nameservers answer version queries with a string that is not a version number: ns.internlnet.nl: "Served by PowerDNS - https://www.powerdns.com/"; ns3.internl.net: "Served by PowerDNS - https://www.powerdns.com/"; ns4.internl.net: "Served by PowerDNS - https://www.powerdns.com/".

#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 2026101904 · primary ns3.internl.net

Found

Primary (MNAME): ns3.internl.net
Contact (RNAME): hostmaster.internl.net
Serial: 2026101904
Refresh / retry: 28800 s / 7200 s
Expire: 604800 s
Negative TTL: 86400 s

Serial per nameserver

Nameserver	Serial
ns.internlnet.nl (31.3.105.132)	2026101904
ns.internlnet.nl (2a03:7900:105:31:3:105:138:1)	2026101904
ns3.internl.net (77.95.248.203)	2026101904
ns3.internl.net (2a00:1478:20:6:4:862:0:1)	2026101904
ns4.internl.net (85.119.243.17)	2026101904
ns4.internl.net (2a00:e760:100:0:f:1247:0:1)	2026101904

Checks

✓ Serial 2026101904 everywhere #22

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

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

The primary nameserver ns3.internl.net is one of the listed nameservers.
✓ Contact hostmaster@internl.net #25

The SOA RNAME hostmaster.internl.net means hostmaster@internl.net.
✓ Date-based serial #26

The serial 2026101904 follows the YYYYMMDDnn convention (2026-10-19).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver: yes
Signatures valid until: 29 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
26773	ECDSAP256SHA256 (13)	SHA256 0BAEC66B5F103DEF…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
26773	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 26773 (SHA256).
✓ Modern algorithms #29

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

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

Records

warn

6 records at the apex

Found

Read from: 31.3.105.132:53

Type	Value	TTL
SOA	ns3.internl.net. hostmaster.internl.net. 2026101904 28800 7200 604800 86400	86400
NS	ns3.internl.net.	3600
NS	ns4.internl.net.	3600
NS	ns.internlnet.nl.	3600
A	185.38.232.231	260
AAAA	2a02:720:9:8::231	3600

Checks

!

Very low TTLs

These records have a TTL below 5m, causing extra queries and slower lookups: A (4m20s). 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.
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