Domain report: universiteitenvannederland.nl

Registration

info

.nl country-code

Found

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

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

#3

Delegation

pass

ns1.digistate.eu, ns2.digistate.nl, ns3.digistate.org

Found

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

Nameserver	Addresses	Network (AS)	Glue
ns1.digistate.eu	185.40.58.178 2a01:4d60:3:1:3::1	AS30870 TRANS-IX-AS - Trans-iX B.V., NL AS30870 TRANS-IX-AS - Trans-iX B.V., NL	-
ns2.digistate.nl	193.27.87.5 2a01:4d60:1:87::5	AS30870 TRANS-IX-AS - Trans-iX B.V., NL AS30870 TRANS-IX-AS - Trans-iX B.V., NL	193.27.87.5 2a01:4d60:1:87::5
ns3.digistate.org	46.19.34.229 2a02:2770::21a:4aff:fea5:6db1	AS196752 TILAA - Tilaa B.V., NL AS196752 TILAA - Tilaa B.V., NL	-

Checks

✓ 3 nameservers #6

Delegated to ns1.digistate.eu, ns2.digistate.nl, ns3.digistate.org.
✓ 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.
✓ 2 autonomous systems #11

The nameservers are spread over: AS196752 (TILAA - Tilaa B.V., NL): 2 addresses; AS30870 (TRANS-IX-AS - Trans-iX B.V., NL): 4 addresses.
✓ Nameserver names under 3 TLDs #12

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

Every nameserver has an IPv6 address.

Nameservers

warn

6 of 6 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.digistate.eu 185.40.58.178	NOERROR, 10 ms, authoritative	no	yes / yes	refused	9.18.33
ns1.digistate.eu 2a01:4d60:3:1:3::1	NOERROR, 10 ms, authoritative	no	yes / yes	refused	9.18.33
ns2.digistate.nl 193.27.87.5	NOERROR, 11 ms, authoritative	no	yes / yes	refused	9.18.33
ns2.digistate.nl 2a01:4d60:1:87::5	NOERROR, 10 ms, authoritative	no	yes / yes	refused	9.18.33
ns3.digistate.org 46.19.34.229	NOERROR, 9 ms, authoritative	no	yes / yes	refused	9.18.33
ns3.digistate.org 2a02:2770::21a:4aff:fea5:6db1	NOERROR, 10 ms, authoritative	no	yes / yes	refused	9.18.33

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.
!

Software version disclosed

These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.digistate.eu: "9.18.33"; ns2.digistate.nl: "9.18.33"; ns3.digistate.org: "9.18.33". 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

warn

serial 2026100101 · primary ns1.digistate.eu

Found

Primary (MNAME): ns1.digistate.eu
Contact (RNAME): hostmaster.universiteitenvannederland.nl
Serial: 2026100101
Refresh / retry: 3600 s / 3600 s
Expire: 1209600 s
Negative TTL: 1800 s

Serial per nameserver

Nameserver	Serial
ns1.digistate.eu (185.40.58.178)	2026100101
ns1.digistate.eu (2a01:4d60:3:1:3::1)	2026100101
ns2.digistate.nl (193.27.87.5)	2026100101
ns2.digistate.nl (2a01:4d60:1:87::5)	2026100101
ns3.digistate.org (46.19.34.229)	2026100101
ns3.digistate.org (2a02:2770::21a:4aff:fea5:6db1)	2026100101

Checks

✓ Serial 2026100101 everywhere #22

All nameservers serve the same version of the zone.
!

Unusual SOA timers

retry 1h should be shorter than refresh 1h. Current values: refresh 1h, retry 1h, expire 14d, negative TTL 30m.

#23
✓ Primary is a public nameserver #24

The primary nameserver ns1.digistate.eu is one of the listed nameservers.
✓ Contact hostmaster@universiteitenvannederland.nl #25

The SOA RNAME hostmaster.universiteitenvannederland.nl means hostmaster@universiteitenvannederland.nl.
✓ Date-based serial #26

The serial 2026100101 follows the YYYYMMDDnn convention (2026-10-01).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC
Signatures valid until: 5 November 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
34274	ECDSAP256SHA256 (13)	SHA256 3B4219FB2EA96C2E…	yes
19059	ECDSAP256SHA256 (13)	SHA256 7C83D7167016644B…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
34274	ZSK (256)	ECDSAP256SHA256 (13)
19059	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 34274 (SHA256), key tag 19059 (SHA256).
✓ Modern algorithms #29

Key algorithms: ECDSAP256SHA256 (13).
✓ Signatures valid until 2026-11-05 #30

The earliest DNSKEY/SOA signature expires at 2026-11-05 01:20 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

warn

13 records at the apex

Found

Read from: 185.40.58.178:53

Type	Value	TTL
SOA	ns1.digistate.eu. hostmaster.universiteitenvannederland.nl. 2026100101 3600 3600 1209600 1800	3600
NS	ns1.digistate.eu.	60
NS	ns3.digistate.org.	60
NS	ns2.digistate.nl.	60
A	193.27.86.36	60
AAAA	2a01:4d60:3:1:37::2	60
MX	10 mail.universiteitenvannederland.nl.	60
MX	20 mail2.universiteitenvannederland.nl.	60
TXT	"y1d9d4ldlknsg9zps9kqtlzyp3znbxgl"	60
TXT	"v=spf1 a mx ip4:193.27.86.53 ip6:2a01:4d60:3:1:49::1 include:amazonses.com ~all"	60
TXT	"DomainVerification=GTHMEVWM6OKHJYV5Y0W5UGHR53TGK6XT0A7VIK3IZ4BZO4C36CV2GSBW9BJGC5D8"	60
TXT	"_besx1suj4zhb4eobiajtiglqazl0z9g"	60
TXT	"gpbxtyslmf469z0hs0880l2pn83k8dw7"	60

Checks

!

Very low TTLs

These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), AAAA (1m), MX (1m), NS (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 1m; 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.
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