Domain report: refdag.nl

Registration

info

.nl country-code

Found

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

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

#3

Delegation

info

ns0.transip.net, ns1.transip.nl, ns2.transip.eu

Found

Parent zone: nl
Delegation from: ns1.dns.nl (194.0.28.53)
NS at the parent: ns0.transip.net, ns1.transip.nl, ns2.transip.eu
NS in the zone: ns0.transip.net, ns1.transip.nl, ns2.transip.eu

Nameserver	Addresses	Network (AS)	Glue
ns0.transip.net	195.135.195.195 2a01:7c8:dddd:195::195	AS20857 TRANSIP-AS - Signet B.V., NL AS20857 TRANSIP-AS - Signet B.V., NL	-
ns1.transip.nl	195.8.195.195 2a01:7c8:7000:195::195	AS20857 TRANSIP-AS - Signet B.V., NL AS20857 TRANSIP-AS - Signet B.V., NL	195.8.195.195 2a01:7c8:7000:195::195
ns2.transip.eu	37.97.199.195 2a01:7c8:f:c1f::195	AS20857 TRANSIP-AS - Signet B.V., NL AS20857 TRANSIP-AS - Signet B.V., NL	-

Checks

✓ 3 nameservers #6

Delegated to ns0.transip.net, ns1.transip.nl, ns2.transip.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.
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS20857 (TRANSIP-AS - Signet B.V., NL): 6 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

#11
✓ Nameserver names under 3 TLDs #12

Nameserver names use the TLDs .eu, .net, .nl.
✓ 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
ns0.transip.net 195.135.195.195	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-
ns0.transip.net 2a01:7c8:dddd:195::195	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-
ns1.transip.nl 195.8.195.195	NOERROR, 13 ms, authoritative	no	yes / yes	refused	-
ns1.transip.nl 2a01:7c8:7000:195::195	NOERROR, 13 ms, authoritative	no	yes / yes	refused	-
ns2.transip.eu 37.97.199.195	NOERROR, 10 ms, authoritative	no	yes / yes	refused	-
ns2.transip.eu 2a01:7c8:f:c1f::195	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 2026063000 · primary ns0.transip.net

Found

Primary (MNAME): ns0.transip.net
Contact (RNAME): hostmaster.transip.nl
Serial: 2026063000
Refresh / retry: 86400 s / 1800 s
Expire: 2419200 s
Negative TTL: 300 s

Serial per nameserver

Nameserver	Serial
ns0.transip.net (195.135.195.195)	2026063000
ns0.transip.net (2a01:7c8:dddd:195::195)	2026063000
ns1.transip.nl (195.8.195.195)	2026063000
ns1.transip.nl (2a01:7c8:7000:195::195)	2026063000
ns2.transip.eu (37.97.199.195)	2026063000
ns2.transip.eu (2a01:7c8:f:c1f::195)	2026063000

Checks

✓ Serial 2026063000 everywhere #22

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

SOA refresh 1d, retry 30m, expire 28d, negative TTL 5m.
✓ Primary is a public nameserver #24

The primary nameserver ns0.transip.net is one of the listed nameservers.
✓ Contact hostmaster@transip.nl #25

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

The serial 2026063000 follows the YYYYMMDDnn convention (2026-06-30).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 0 iterations, 8-byte salt
Signatures valid until: 29 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
21334	ECDSAP256SHA256 (13)	SHA256 DEE428B1681E06C9…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
21334	KSK (257)	ECDSAP256SHA256 (13)
16169	ZSK (256)	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 21334 (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.
!

NSEC3 with extra iterations or salt

NSEC3 uses 0 iterations and a 8-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.

#31

Records

info

18 records at the apex

Found

Read from: 195.135.195.195:53

Type	Value	TTL
SOA	ns0.transip.net. hostmaster.transip.nl. 2026063000 86400 1800 2419200 300	3600
NS	ns0.transip.net.	86400
NS	ns1.transip.nl.	86400
NS	ns2.transip.eu.	86400
A	188.166.135.27	3600
MX	5 refdag-nl.mail.protection.outlook.com.	86400
TXT	"9f7feeab5834b737452f2de21ad6a9e8 - KnowBe4"	86400
TXT	"MS=ms31846136"	86400
TXT	"apple-domain-verification=lp7JyPz8pMf89puH"	86400
TXT	"50+5Mt0S6fd9gT9/r9SZ489paRTE9DsXoRrdaqNZgmPNF669ysBRCzJmpjqxO/X0+I/JkNwTCXH+MRqI8MWTtQ=="	86400
TXT	"google-site-verification=yqjSEMV4G7_XK_v4PCl7t5oXBpoZjaVzMPPhiU9IHLQ"	86400
TXT	"google-site-verification=8Dep22CEFKlXZ3vQwKUWuqntuCmYJJAhAtULGBHoDso"	86400
TXT	"google-site-verification=OPrdeVKDdNANx_Jtw13lCkqs-P__twjGuicItPqFuAI"	86400
TXT	"hibp-verify=dweb_hhnzzliwj12fskrcar79ztti"	86400
TXT	"jamf-site-verification=1mt-5XGXLLtMVNig-WhDdQ"	86400
TXT	"google-site-verification=CKeKejtmaJH9K6aHC-gK_guFos0prTfX50Z9msKE3ic"	86400
TXT	"adobe-idp-site-verification=9e61d000107258131abb70aa8b8248e089eb7eaa38c074dad6f3ab8897561e0c"	86400
TXT	"v=spf1 include:_spf.erdee.nl ~all"	86400

Checks

✓ TTLs within range #32

TTLs: A 1h, MX 1d, NS 1d. The NS TTL at the parent is 1h and in the zone 1d; resolvers may use either.
✓ No CNAME at the apex #33

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

Names that don't exist return NXDOMAIN.
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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