Domain report: osw.nl

Registration

info

.nl country-code

Found

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

Lookup error: https://rdap.sidn.nl/domain/osw.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/osw.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, 14 ms, authoritative	no	yes / yes	refused	-
ns0.transip.net 2a01:7c8:dddd:195::195	NOERROR, 16 ms, authoritative	no	yes / yes	refused	-
ns1.transip.nl 195.8.195.195	NOERROR, 19 ms, authoritative	no	yes / yes	refused	-
ns1.transip.nl 2a01:7c8:7000:195::195	NOERROR, 15 ms, authoritative	no	yes / yes	refused	-
ns2.transip.eu 37.97.199.195	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
ns2.transip.eu 2a01:7c8:f:c1f::195	NOERROR, 18 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 2026102200 · primary ns0.transip.net

Found

Primary (MNAME): ns0.transip.net
Contact (RNAME): hostmaster.transip.nl
Serial: 2026102200
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)	2026102200
ns0.transip.net (2a01:7c8:dddd:195::195)	2026102200
ns1.transip.nl (195.8.195.195)	2026102200
ns1.transip.nl (2a01:7c8:7000:195::195)	2026102200
ns2.transip.eu (37.97.199.195)	2026102200
ns2.transip.eu (2a01:7c8:f:c1f::195)	2026102200

Checks

✓ Serial 2026102200 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 2026102200 follows the YYYYMMDDnn convention (2026-10-22).

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: 5 November 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
61203	ECDSAP256SHA256 (13)	SHA256 91A672B4EEAC95CF…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
61265	ZSK (256)	ECDSAP256SHA256 (13)
61203	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 61203 (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 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

warn

21 records at the apex

Found

Read from: 195.135.195.195:53

Type	Value	TTL
SOA	ns0.transip.net. hostmaster.transip.nl. 2026102200 86400 1800 2419200 300	3600
NS	ns1.transip.nl.	86400
NS	ns0.transip.net.	86400
NS	ns2.transip.eu.	86400
A	34.12.145.44	60
MX	30 aspmx3.googlemail.com.	60
MX	20 alt1.aspmx.l.google.com.	60
MX	10 aspmx.l.google.com.	60
MX	30 aspmx2.googlemail.com.	60
MX	20 alt2.aspmx.l.google.com.	60
TXT	"atlassian-domain-verification=c6URt2aTnfBHjQY76WwfXNAlaB09IpAcfIC2NJdgBbwLJIr6o9lzLijK5tj0wQzQ"	60
TXT	"anthropic-domain-verification-z7pt45=9P1lSowasaQWXGCEcYXZ22Yji"	60
TXT	"google-site-verification=-roAsq0OLBVN-BH_ACzFj_bfHhT7gOkTVsrN26PqdLY"	60
TXT	"v=spf1 a ip4:87.233.198.122 include:spf.sendinblue.com include:_spf.google.com mx ~all"	60
TXT	"Sendinblue-code:fa8372d713218f5d0ee73713b95c86b9"	60
TXT	"ahrefs-site-verification_83675aeb7c9274802d4585f1aa0a1c287af0def4b90a42d3e4f372c0d4cdcf9d"	60
TXT	"apple-domain-verification=pAkOSINXHaJeje5P"	60
TXT	"google-site-verification=q5onR8TnYkN1As95ATJq7nHEKPeHfa6OMcDFv7uJB20"	60
TXT	"openai-domain-verification=dv-ixalJ0gadfQKulwlyn3DoqEt"	60
CAA	0 issue "pki.goog"	60
CAA	0 issue "letsencrypt.org"	60

Checks

!

Very low TTLs

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