knhs.nl

Checked 22 October 2026, 14:03 UTC · via 8.8.8.8
!Passed with warnings
28 passed 1 warning 0 failed 6 info

Registration

info

.nl country-code · Realtime Register

Found

TLD
.nl (country-code)
ICANN policies apply
no
Registrar
Realtime Register
Registered
17 October 2001
Last changed
24 November 2020
Status
active
Registry nameservers
ns1.sqr.nl, ns2.sqr.domains, ns3.sqr.cloud
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.sqr.nl, ns2.sqr.domains, ns3.sqr.cloud

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.sqr.nl, ns2.sqr.domains, ns3.sqr.cloud
NS in the zone
ns1.sqr.nl, ns2.sqr.domains, ns3.sqr.cloud
NameserverAddressesNetwork (AS)Glue
ns1.sqr.nl109.235.73.236 2a01:518:ffff:4020::53:3AS25151 CYSO-AS - Cyso Group B.V., NL AS25151 CYSO-AS - Cyso Group B.V., NL-
ns2.sqr.domains93.94.227.166 2a01:518:ffff:4020::53:4AS25151 CYSO-AS - Cyso Group B.V., NL AS25151 CYSO-AS - Cyso Group B.V., NL-
ns3.sqr.cloud46.23.87.195 2a03:6000:1002:1002::54AS60131 HIGH5-NL - High5! B.V., NL AS60131 HIGH5-NL - High5! B.V., NL-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.sqr.nl, ns2.sqr.domains, ns3.sqr.cloud.
  • ✓ 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: AS25151 (CYSO-AS - Cyso Group B.V., NL): 4 addresses; AS60131 (HIGH5-NL - High5! B.V., NL): 2 addresses.
  • ✓ Nameserver names under 3 TLDs #12
    Nameserver names use the TLDs .cloud, .domains, .nl.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.sqr.nl 109.235.73.236NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1.sqr.nl 2a01:518:ffff:4020::53:3NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns2.sqr.domains 93.94.227.166NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns2.sqr.domains 2a01:518:ffff:4020::53:4NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns3.sqr.cloud 46.23.87.195NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns3.sqr.cloud 2a03:6000:1002:1002::54NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns1.sqr.nl: "Served by PowerDNS - https://www.powerdns.com/"; ns2.sqr.domains: "Served by PowerDNS - https://www.powerdns.com/"; ns3.sqr.cloud: "Served by PowerDNS - https://www.powerdns.com/".
    #17
  • ✓ 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 2026092506 · primary ns1.sqr.nl

Found

Primary (MNAME)
ns1.sqr.nl
Contact (RNAME)
hostmaster.knhs.nl
Serial
2026092506
Refresh / retry
16384 s / 2048 s
Expire
1048576 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1.sqr.nl (109.235.73.236)2026092506
ns1.sqr.nl (2a01:518:ffff:4020::53:3)2026092506
ns2.sqr.domains (93.94.227.166)2026092506
ns2.sqr.domains (2a01:518:ffff:4020::53:4)2026092506
ns3.sqr.cloud (46.23.87.195)2026092506
ns3.sqr.cloud (2a03:6000:1002:1002::54)2026092506

Checks

  • ✓ Serial 2026092506 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h33m4s, retry 34m8s, expire 291h16m16s, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.sqr.nl is one of the listed nameservers.
  • ✓ Contact hostmaster@knhs.nl #25
    The SOA RNAME hostmaster.knhs.nl means hostmaster@knhs.nl.
  • ✓ Date-based serial #26
    The serial 2026092506 follows the YYYYMMDDnn convention (2026-09-25).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
5 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
4890ECDSAP256SHA256 (13)SHA256 F105263F31C489B5…yes

DNSKEY in the zone

Key tagRoleAlgorithm
4890KSK (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 4890 (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.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

warn

14 records at the apex

Found

Read from
109.235.73.236:53
TypeValueTTL
SOAns1.sqr.nl. hostmaster.knhs.nl. 2026092506 16384 2048 1048576 300900
NSns3.sqr.cloud.86400
NSns2.sqr.domains.86400
NSns1.sqr.nl.86400
A20.105.224.4160
MX0 knhs-nl.mail.protection.outlook.com.3600
TXT"bw=1hB8MmAsmLcdlVk2BjTU5rKwDmoltTWfgd2zWmUUaOSZ"3600
TXT"v=spf1 include:spf.simplemailservice.eu include:spf.protection.outlook.com include:_spf.emyris.com include:sendgrid.net include:_spf.salesforce.com ip4:185.46.182.1 ip4:185.46.182.200/29 ip4:185.46.182.208/31 ip6:2603:10a6:10:2e7::20 ip4:161.51.75.98 ip" "4:213.247.57.132 ip4:213.247.57.139 ip4:52.29.184.146 ip4:46.31.48.0/21 ip6:2a02:23e8::/32 ip4:37.221.216.0/21 ip4:93.94.226.32/27 ip4:37.46.139.112/29 ip4:52.169.0.179 ip4:104.40.229.156 -all"3600
TXT"DomainVerification=H1I4R9QMN23ZCJBRMG8GASSASUL7WL01TPTQVXPGVQUOMTVOG1J8BLRP0NYKNCFT"3600
TXT"MS=ms86652808"3600
TXT"apple-domain-verification=Agm1hHCp0VIfJe2L"3600
TXT"google-site-verification=fYUPwJI869W_ES9XPu5zyRjp9jQJj5zWYzCgA1lbJn8"3600
TXT"00DWV00000AZJd7=1TBTg00000000Cv"3600
TXT"facebook-domain-verification=373yu14fji1oae2bvcsva4el5jsjco"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (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.
  • 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