linnaeushof.nl

Checked 22 October 2026, 14:11 UTC · via 8.8.8.8
!Passed with warnings
22 passed 3 warnings 0 failed 4 info

Registration

info

.nl country-code

Found

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

Delegation

info

a1-225.akam.net, a13-66.akam.net, a20-65.akam.net, a3-65.akam.net, a6-67.akam.net, a8-64.akam.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
a1-225.akam.net, a13-66.akam.net, a20-65.akam.net, a3-65.akam.net, a6-67.akam.net, a8-64.akam.net
NS in the zone
a1-225.akam.net, a13-66.akam.net, a20-65.akam.net, a3-65.akam.net, a6-67.akam.net, a8-64.akam.net
NameserverAddressesNetwork (AS)Glue
a1-225.akam.net193.108.91.225 2600:1401:2::e1AS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a13-66.akam.net2.22.230.66 2600:1480:800::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a20-65.akam.net95.100.175.65 2a02:26f0:67::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a3-65.akam.net96.7.49.65 2600:1408:1c::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a6-67.akam.net23.211.133.67 2600:1401:1::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a8-64.akam.net2.16.40.64 2600:1403:a::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-225.akam.net, a13-66.akam.net, a20-65.akam.net, a3-65.akam.net, a6-67.akam.net, a8-64.akam.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 6 IPv4 /24s and 6 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20940 (AKAMAI-ASN1 - Akamai International B.V., NL): 1 address; AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 11 addresses.
  • i
    All nameserver names under .net
    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

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-225.akam.net 193.108.91.225NOERROR, 5 ms, authoritativenoyes / yesrefused41824.11
a1-225.akam.net 2600:1401:2::e1NOERROR, 3 ms, authoritativenoyes / yesrefused41824.11
a13-66.akam.net 2.22.230.66NOERROR, 4 ms, authoritativenoyes / yesrefused41824.4
a13-66.akam.net 2600:1480:800::42NOERROR, 5 ms, authoritativenoyes / yesrefused41824.10
a20-65.akam.net 95.100.175.65NOERROR, 4 ms, authoritativenoyes / yesrefused48878.32
a20-65.akam.net 2a02:26f0:67::41NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a3-65.akam.net 96.7.49.65NOERROR, 3 ms, authoritativenoyes / yesrefused41824.8
a3-65.akam.net 2600:1408:1c::41NOERROR, 5 ms, authoritativenoyes / yesrefused41824.9
a6-67.akam.net 23.211.133.67NOERROR, 5 ms, authoritativenoyes / yesrefused48878.30
a6-67.akam.net 2600:1401:1::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.27
a8-64.akam.net 2.16.40.64NOERROR, 5 ms, authoritativenoyes / yesrefused48878.27
a8-64.akam.net 2600:1403:a::40NOERROR, 4 ms, authoritativenoyes / yesrefused48878.32

Checks

  • ✓ All respond #14
    All 12 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-225.akam.net: "41824.11"; a13-66.akam.net: "41824.4"; a13-66.akam.net: "41824.10"; a20-65.akam.net: "48878.32"; a20-65.akam.net: "48878.31"; a3-65.akam.net: "41824.8"; a3-65.akam.net: "41824.9"; a6-67.akam.net: "48878.30"; a6-67.akam.net: "48878.27"; a8-64.akam.net: "48878.27"; a8-64.akam.net: "48878.32". Hide or replace the version string.
    #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 2024111528 · primary a1-225.akam.net

Found

Primary (MNAME)
a1-225.akam.net
Contact (RNAME)
hostmaster.linnaeushof.nl
Serial
2024111528
Refresh / retry
3600 s / 600 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
a1-225.akam.net (193.108.91.225)2024111528
a1-225.akam.net (2600:1401:2::e1)2024111528
a13-66.akam.net (2.22.230.66)2024111528
a13-66.akam.net (2600:1480:800::42)2024111528
a20-65.akam.net (95.100.175.65)2024111528
a20-65.akam.net (2a02:26f0:67::41)2024111528
a3-65.akam.net (96.7.49.65)2024111528
a3-65.akam.net (2600:1408:1c::41)2024111528
a6-67.akam.net (23.211.133.67)2024111528
a6-67.akam.net (2600:1401:1::43)2024111528
a8-64.akam.net (2.16.40.64)2024111528
a8-64.akam.net (2600:1403:a::40)2024111528

Checks

  • ✓ Serial 2024111528 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 10m, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver a1-225.akam.net is one of the listed nameservers.
  • ✓ Contact hostmaster@linnaeushof.nl #25
    The SOA RNAME hostmaster.linnaeushof.nl means hostmaster@linnaeushof.nl.
  • ✓ Date-based serial #26
    The serial 2024111528 follows the YYYYMMDDnn convention (2024-11-15).

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

warn

13 records at the apex

Found

Read from
193.108.91.225:53
TypeValueTTL
SOAa1-225.akam.net. hostmaster.linnaeushof.nl. 2024111528 3600 600 604800 30086400
NSa6-67.akam.net.300
NSa1-225.akam.net.300
NSa20-65.akam.net.300
NSa8-64.akam.net.300
NSa13-66.akam.net.300
NSa3-65.akam.net.300
A2.23.176.15220
A2.23.176.15020
MX10 mail.aspro-ocio.es.300
MX0 linnaeushof-nl.mail.protection.outlook.com.300
TXT"v=spf1 ip4:195.77.203.170 ip4:213.96.202.208 include:spf.protection.outlook.com mx ~all"300
TXT"MS=ms66485043"300

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (20s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 5m; 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