ioresearch.nl

Checked 22 October 2026, 13:52 UTC · via 8.8.8.8
iAll checks passed
28 passed 0 warnings 0 failed 5 info

Registration

info

.nl country-code

Found

TLD
.nl (country-code)
ICANN policies apply
no
Lookup error: https://rdap.sidn.nl/domain/ioresearch.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/ioresearch.nl returned HTTP 429
    #3

Delegation

info

ns01.hostnet.nl, ns02.hostnet.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns01.hostnet.nl, ns02.hostnet.nl
NS in the zone
ns01.hostnet.nl, ns02.hostnet.nl
NameserverAddressesNetwork (AS)Glue
ns01.hostnet.nl195.206.121.13 2001:67c:28cc::13AS197495 ONECOM-INFRA - One.com A/S, DK AS197495 ONECOM-INFRA - One.com A/S, DK-
ns02.hostnet.nl185.10.11.13 2001:67c:3c0::13AS51468 ONECOM - One.com A/S, DK AS51468 ONECOM - One.com A/S, DK-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns01.hostnet.nl, ns02.hostnet.nl.
    #6
  • ✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS197495 (ONECOM-INFRA - One.com A/S, DK): 2 addresses; AS51468 (ONECOM - One.com A/S, DK): 2 addresses.
  • i
    All nameserver names under .nl
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns01.hostnet.nl 195.206.121.13NOERROR, 16 ms, authoritativenoyes / yesrefused-
ns01.hostnet.nl 2001:67c:28cc::13NOERROR, 16 ms, authoritativenoyes / yesrefused-
ns02.hostnet.nl 185.10.11.13NOERROR, 16 ms, authoritativenoyes / yesrefused-
ns02.hostnet.nl 2001:67c:3c0::13NOERROR, 16 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 4 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 2026092801 · primary ns01.hostnet.nl

Found

Primary (MNAME)
ns01.hostnet.nl
Contact (RNAME)
hostmaster.hostnet.nl
Serial
2026092801
Refresh / retry
14400 s / 3600 s
Expire
1209600 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns01.hostnet.nl (195.206.121.13)2026092801
ns01.hostnet.nl (2001:67c:28cc::13)2026092801
ns02.hostnet.nl (185.10.11.13)2026092801
ns02.hostnet.nl (2001:67c:3c0::13)2026092801

Checks

  • ✓ Serial 2026092801 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 14d, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns01.hostnet.nl is one of the listed nameservers.
  • ✓ Contact hostmaster@hostnet.nl #25
    The SOA RNAME hostmaster.hostnet.nl means hostmaster@hostnet.nl.
  • ✓ Date-based serial #26
    The serial 2026092801 follows the YYYYMMDDnn convention (2026-09-28).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
0 iterations, 0-byte salt
Signatures valid until
5 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
46811RSASHA256 (8)SHA256 0F30F8C29E0A98E2…yes

DNSKEY in the zone

Key tagRoleAlgorithm
46811KSK (257)RSASHA256 (8)
9193ZSK (256)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 46811 (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 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

info

12 records at the apex

Found

Read from
195.206.121.13:53
TypeValueTTL
SOAns01.hostnet.nl. hostmaster.hostnet.nl. 2026092801 14400 3600 1209600 60014400
NSns01.hostnet.nl.14400
NSns02.hostnet.nl.14400
A45.82.189.73600
MX0 ioresearch-nl.mail.protection.outlook.com.14400
TXT"apple-domain-verification=41opHOHJgi6jXH8e"600
TXT"mandrill_verify.szsxw5zQBO-ZbF25Jzu7uQ"600
TXT"_ubyetpss34hy9814ceojtz7sddpjyht"600
TXT"Sendinblue-code:8bcc7ab560606c4fe595bb0e5968c79e"600
TXT"v=spf1 ip4:85.17.209.68 ip4:83.98.197.35 ip4:46.19.218.153 ip4:188.122.70.207 ip4:172.246.57.200 ip4:209.67.69.0/24 ip4:87.249.107.128/27 ip4:217.114.97.128/28 ip4:217.114.102.160/27 ip4:213.249.66.58 ip4:213.249.66.8/32 ip4:213.249.66.9/32 ip4:213.249.66" ".11/32 ip4:213.249.64.225/32 ip4:213.249.66.225/32 ip6:2a01:448:1:1002::8/128 ip6:2a01:448:1:1002::9/128 ip6:2a01:448:1:1002::11/128 ip6:2a01:448:1::1097:64:226/128 ip6:2a01:448:1:1002::226/128 ip4:52.100.0.0/14 ip4:51.4.72.0/24 ip4:51.5.72.0/24 ip4:51.5." "80.0/27 ip4:20.47.149.138/32 ip4:148.105.8.0/21 ip4:185.41.28.0/22 ip4:94.143.16.0/21 ip4:185.24.144.0/22 ip4:153.92.224.0/19 ip4:213.32.128.0/18 ip4:185.107.232.0/22 ip4:77.32.128.0/18 ip4:77.32.192.0/19 ip4:212.146.192.0/18 ip4:172.246.0.0/18 ip4:188.12" "2.70.192/26 ip6:2a00:1630:128::/48 ip4:45.84.218.0/24 ip6:2a0f:e382::/32 ip4:143.55.146.210 include:desan.nl include:sendgrid.net include:spf.topdesk.net include:spf.mandrillapp.com include:spf.protection.outlook.com -all"600
TXT"google-site-verification=TcQe91hGl71J7qRucoY6THPLt0o6Aw54nBgWZxl9lWw"600
TXT"v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwMNlyJr66IRHXmxIwIjCzTFfvbvUFGGFzU6hiLP3we53MZ6doAGxrQbYEY5ijYFjshkYHksyWN6PY7kh215HsikUFSC723IygC6mqPQ0tbk9a6akIkpHLanIg3fGppiJyZFbAwu2Dft+UyHDa9PqcfA+rZgXGtS411b/WnoB5dhIMkbCQSCryxwE5IPOHIl2h" "oewLVMlQL26MUVGraKPlc6MDQBmgy5Hcr5unK51l14WBKrk7vwNFlgS4hCQRz0A8USF2jJDm+94eBLTnsA167k4M6Y+Zf26J3eWYPBMZ7gH4t+Mg+lUKsIRyGCVflk/NjVTE9PrnMIJgOlvYirZTwIDAQAB"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 4h, NS 4h. The NS TTL at the parent is 1h and in the zone 4h; 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