Domain report: isso.nl

Registration

info

.nl country-code · Exonet B.V.

Found

TLD: .nl (country-code)
ICANN policies apply: no
Registrar: Exonet B.V.
Registered: 20 October 1997
Last changed: 5 May 2025
Status: active
Registry nameservers: ns1.exonet.nl, ns2.exonet.nl, ns3.exonet.eu
RDAP server: https://rdap.sidn.nl/

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

Expiry date not published

The registry does not publish the expiry date in RDAP. Check it with your registrar.

#3
i

No transfer lock

The domain has no transfer lock (status: active). A registrar lock protects against unauthorized transfers.

#4
✓ Registry and delegation match #5

The nameservers registered at the registry are the ones published in DNS.

Delegation

pass

ns1.exonet.nl, ns2.exonet.nl, ns3.exonet.eu

Found

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

Nameserver	Addresses	Network (AS)	Glue
ns1.exonet.nl	45.153.18.21 2a00:1e29:4689::53	AS49544 i3Dnet - i3D.net B.V, NL AS49544 i3Dnet - i3D.net B.V, NL	45.153.18.21 2a00:1e29:4689::53
ns2.exonet.nl	89.222.108.198 2a02:6ea0:cf29::198	AS60068 CDN77 - Datacamp Limited, GB AS60068 CDN77 - Datacamp Limited, GB	89.222.108.198 2a02:6ea0:cf29::198
ns3.exonet.eu	178.22.63.166 2a00:1e28:3:2304::53	AS12859 NL-BIT - BIT BV, NL AS12859 NL-BIT - BIT BV, NL	-

Checks

✓ 3 nameservers #6

Delegated to ns1.exonet.nl, ns2.exonet.nl, ns3.exonet.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.
✓ 3 autonomous systems #11

The nameservers are spread over: AS12859 (NL-BIT - BIT BV, NL): 2 addresses; AS49544 (i3Dnet - i3D.net B.V, NL): 2 addresses; AS60068 (CDN77 - Datacamp Limited, GB): 2 addresses.
✓ Nameserver names under 2 TLDs #12

Nameserver names use the TLDs .eu, .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
ns1.exonet.nl 45.153.18.21	NOERROR, 14 ms, authoritative	no	yes / yes	refused	-
ns1.exonet.nl 2a00:1e29:4689::53	NOERROR, 14 ms, authoritative	no	yes / yes	refused	-
ns2.exonet.nl 89.222.108.198	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-
ns2.exonet.nl 2a02:6ea0:cf29::198	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-
ns3.exonet.eu 178.22.63.166	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-
ns3.exonet.eu 2a00:1e28:3:2304::53	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 2026102201 · primary ns1.exonet.nl

Found

Primary (MNAME): ns1.exonet.nl
Contact (RNAME): hostmaster.exonet.nl
Serial: 2026102201
Refresh / retry: 10800 s / 3600 s
Expire: 604800 s
Negative TTL: 3600 s

Serial per nameserver

Nameserver	Serial
ns1.exonet.nl (45.153.18.21)	2026102201
ns1.exonet.nl (2a00:1e29:4689::53)	2026102201
ns2.exonet.nl (89.222.108.198)	2026102201
ns2.exonet.nl (2a02:6ea0:cf29::198)	2026102201
ns3.exonet.eu (178.22.63.166)	2026102201
ns3.exonet.eu (2a00:1e28:3:2304::53)	2026102201

Checks

✓ Serial 2026102201 everywhere #22

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

SOA refresh 3h, retry 1h, expire 7d, negative TTL 1h.
✓ Primary is a public nameserver #24

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

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

The serial 2026102201 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
20482	RSASHA256 (8)	SHA256 8CEB2D8206B7C0F1…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
6831	ZSK (256)	RSASHA256 (8)
20482	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 20482 (SHA256).
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ 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

info

10 records at the apex

Found

Read from: 45.153.18.21:53

Type	Value	TTL
SOA	ns1.exonet.nl. hostmaster.exonet.nl. 2026102201 10800 3600 604800 3600	3597
NS	ns1.exonet.nl.	3597
NS	ns2.exonet.nl.	3597
NS	ns3.exonet.eu.	3597
A	84.247.8.81	300
MX	0 isso-nl.mail.protection.outlook.com.	2028
TXT	"RwbVTUxJXjFpp2aClp9yAhnPvoNNXG+4BdrDttsk+borjmG7h/HZvSq171Y4YndsSkDNlk432eO5cGfVEyDDkQ=="	3600
TXT	"MS=ms28232355"	3600
TXT	"google-site-verification=TFJ4jbGZTa9rgl-l6ldJt8UAQNH5OOHYlT1wQOAWpZs"	3600
TXT	"v=spf1 a mx ip4:158.120.84.56 ip4:23.97.219.0 ip4:145.128.233.130 ip4:213.132.210.49 ip4:149.72.38.29 ip4:40.68.168.67 ip4:95.211.51.216 ip4:20.224.68.105 include:_spf.fluxility.com include:sendgrid.net include:spf.flowmailer.net include:spf.protection.ou" "tlook.com include:_spf.exonet.nl -all"	3600

Checks

✓ TTLs within range #32

TTLs: A 5m, MX 33m48s, NS 59m57s. The NS TTL at the parent is 1h and in the zone 59m57s; 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.
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