Domain report: ridderkerk.nl

Registration

info

.nl country-code

Found

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

Lookup error: https://rdap.sidn.nl/domain/ridderkerk.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/ridderkerk.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, 11 ms, authoritative	no	yes / yes	refused	-
ns0.transip.net 2a01:7c8:dddd:195::195	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
ns1.transip.nl 195.8.195.195	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-
ns1.transip.nl 2a01:7c8:7000:195::195	NOERROR, 12 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, 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 2026101500 · primary ns0.transip.net

Found

Primary (MNAME): ns0.transip.net
Contact (RNAME): hostmaster.transip.nl
Serial: 2026101500
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)	2026101500
ns0.transip.net (2a01:7c8:dddd:195::195)	2026101500
ns1.transip.nl (195.8.195.195)	2026101500
ns1.transip.nl (2a01:7c8:7000:195::195)	2026101500
ns2.transip.eu (37.97.199.195)	2026101500
ns2.transip.eu (2a01:7c8:f:c1f::195)	2026101500

Checks

✓ Serial 2026101500 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 2026101500 follows the YYYYMMDDnn convention (2026-10-15).

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
12823	ECDSAP256SHA256 (13)	SHA256 D66547866F3BDFB9…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
12823	KSK (257)	ECDSAP256SHA256 (13)
2806	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 12823 (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

26 records at the apex

Found

Read from: 195.135.195.195:53

Type	Value	TTL
SOA	ns0.transip.net. hostmaster.transip.nl. 2026101500 86400 1800 2419200 300	3600
NS	ns0.transip.net.	86400
NS	ns1.transip.nl.	86400
NS	ns2.transip.eu.	86400
A	185.144.224.28	300
A	31.7.6.87	300
A	31.7.0.60	300
AAAA	2a03:9700:8000:1::25	300
AAAA	2a03:9700:8000:1::23	300
AAAA	2a03:9700:8000:1::24	300
MX	10 ridderkerk-nl.u-v1.mx.microsoft.	60
TXT	"997cfa8173a233827323738ecd1ac3f2a99c7a8fc432bcb6c214e95925eb0237"	300
TXT	"ZnYWK/pt7n2PutFvku8zAwtJtW5rMNkWnKmU2FYfTqXrdFxQ03KTZdzE+VZTmJefR71Ckupo/4a8w4J2l20njQ=="	300
TXT	"safegpt-domain-verification=ea6fd000c34693b3503fff2530a45c3d74ae8e472826567491cea01963e2e804"	300
TXT	"de0e6233365f1fac20764bd136774324a56248d5001de2b5caaac0748395d255"	300
TXT	"32cb9a3ac64aa629dca4a93d0ccd9ebc3c1bbc1143609e69dbb792a03285f9e2"	300
TXT	"0099240e279b3c5050e2016bd0b05c81ef1ec2171e7610506ea116662567bef4"	300
TXT	"v=spf1 ip4:109.109.118.0/26 ip4:109.109.120.0/24 include:spf.simgroephosting.nl include:spf.flowmailer.net include:_spf.services.centric.eu include:spf.protection.outlook.com include:spf.gouwit.hosting include:spf.eprov.nl include:spf.shockmedia.email inc" "lude:_spf.ezorg.nl -all"	300
TXT	"2c7a75fdc8a2cb606c19a6ccae03971200058cea2fdd606df5ebec41b90bbaf3"	300
TXT	"MS=ms36246853"	300
TXT	"753bf27b2bb7008db98ccb3b2e54c42cedec580fb69ac8ca02efff839da76a10"	300
TXT	"DomainVerification=LCO0QEJ873MIE8OGY4FKAF0JE0O0SLCMSUMAAACKKVBQFOSPUVINIALXIIPRDDEM"	300
CAA	0 issue "kpn.com"	300
CAA	0 issue "letsencrypt.org"	300
CAA	0 iodef "mailto:transip@bar-organisatie.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 (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: kpn.com, letsencrypt.org, sectigo.com.