Domain report: kit.nl

Registration

info

.nl country-code

Found

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

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

#3

Delegation

pass

ns3.firstfind.nl, ns4.firstfind.nl, ns5.firstfind.net

Found

Parent zone: nl
Delegation from: ns1.dns.nl (194.0.28.53)
NS at the parent: ns3.firstfind.nl, ns4.firstfind.nl, ns5.firstfind.net
NS in the zone: ns3.firstfind.nl, ns4.firstfind.nl, ns5.firstfind.net

Nameserver	Addresses	Network (AS)	Glue
ns3.firstfind.nl	5.157.86.222 2a01:b940:1057::53	AS48635 CLDIN-NL - Your Hosting B.V., NL AS48635 CLDIN-NL - Your Hosting B.V., NL	-
ns4.firstfind.nl	5.157.87.222 2a01:b940:1057::54	AS48635 CLDIN-NL - Your Hosting B.V., NL AS48635 CLDIN-NL - Your Hosting B.V., NL	-
ns5.firstfind.net	178.128.248.2 2a03:b0c0:2:d0::1183:f001	AS14061 DIGITALOCEAN-ASN - DigitalOcean, LLC, US AS14061 DIGITALOCEAN-ASN - DigitalOcean, LLC, US	-

Checks

✓ 3 nameservers #6

Delegated to ns3.firstfind.nl, ns4.firstfind.nl, ns5.firstfind.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 2 IPv6 /48s.
✓ 2 autonomous systems #11

The nameservers are spread over: AS14061 (DIGITALOCEAN-ASN - DigitalOcean, LLC, US): 2 addresses; AS48635 (CLDIN-NL - Your Hosting B.V., NL): 4 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

fail

5 of 6 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns3.firstfind.nl 5.157.86.222	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
ns3.firstfind.nl 2a01:b940:1057::53	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
ns4.firstfind.nl 5.157.87.222	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-
ns4.firstfind.nl 2a01:b940:1057::54	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-
ns5.firstfind.net 178.128.248.2	no response	no	no / no	-	-
ns5.firstfind.net 2a03:b0c0:2:d0::1183:f001	NOERROR, 18 ms, authoritative	no	yes / yes	refused	-

Checks

✗

Nameservers not responding

These addresses did not answer, so resolvers waste time on timeouts: ns5.firstfind.net (178.128.248.2): read udp 46.225.38.91:55671->178.128.248.2:53: i/o timeout.

#14
✓ 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 2026101501 · primary ns3.firstfind.nl

Found

Primary (MNAME): ns3.firstfind.nl
Contact (RNAME): hostmaster.firstfind.nl
Serial: 2026101501
Refresh / retry: 16384 s / 2048 s
Expire: 1048576 s
Negative TTL: 14400 s

Serial per nameserver

Nameserver	Serial
ns3.firstfind.nl (5.157.86.222)	2026101501
ns3.firstfind.nl (2a01:b940:1057::53)	2026101501
ns4.firstfind.nl (5.157.87.222)	2026101501
ns4.firstfind.nl (2a01:b940:1057::54)	2026101501
ns5.firstfind.net (2a03:b0c0:2:d0::1183:f001)	2026101501

Checks

✓ Serial 2026101501 everywhere #22

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

SOA refresh 4h33m4s, retry 34m8s, expire 291h16m16s, negative TTL 4h.
✓ Primary is a public nameserver #24

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

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

The serial 2026101501 follows the YYYYMMDDnn convention (2026-10-15).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 1 iterations, 1-byte salt
Signatures valid until: 29 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
50086	RSASHA256 (8)	SHA256 80C4A3DDBE53D81A…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
52288	ZSK (256)	RSASHA256 (8)
50086	KSK (257)	RSASHA256 (8)

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 50086 (SHA256).
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ 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 1 iteration and a 1-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

15 records at the apex

Found

Read from: 5.157.86.222:53

Type	Value	TTL
SOA	ns3.firstfind.nl. hostmaster.firstfind.nl. 2026101501 16384 2048 1048576 14400	3600
NS	ns4.firstfind.nl.	3600
NS	ns3.firstfind.nl.	3600
NS	ns5.firstfind.net.	3600
A	84.22.103.111	86400
AAAA	2a02:2770:8:0:21a:4aff:fe17:9f85	86400
MX	1 kit-nl.mail.protection.outlook.com.	60
TXT	"tacklephishing-domain-verification=1328e6e365e04234838cb7a028bc3395"	14400
TXT	"v=spf1 MX include:spf1.kit.nl include:spf.protection.outlook.com include:spfresh.kit.nl include:spf.mailjet.com ip4:74.125.148.0/22 ip4:74.125.244.0/22 ip4:94.23.26.114 ip6:2a00:1a48:7808:101:be76:4eff:fe08:bdff ~all"	14400
TXT	"apple-domain-verification=wDKinCsePKDYOSLz"	14400
TXT	"MS=ms12545800"	14400
TXT	"_rexcqcn1pa9mm9v1j5ex97ih4ie6x08"	14400
TXT	"kM1jlNng8dp6vTeIxJ1xT39vZYv7pHmRLe5Q4oaRJB7Gxof+XjO7V3ULz4oRAA9Rs610jGABBhofiR998NwztA=="	14400
TXT	"adobe-idp-site-verification=a8abadadd9d239a49eca714f6b0f46a12e3bfd873f0f0abf0dddf00ed41bdd80"	14400
TXT	"google-site-verification=P_K5jhdcCUAKGI57ENn3L45d-bPGhoOcQYha-PZ2IkU"	14400

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.

#32
✓ No CNAME at the apex #33

The zone apex has no CNAME record.
i

Wildcard record

A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.

#34
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