sans.nl

Checked 22 October 2026, 15:50 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 3 info

Registration

info

.nl country-code

Found

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

Delegation

pass

nsauth1.introweb.nl, nsauth2.introweb.nl, nsauth3.introweb.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
nsauth1.introweb.nl, nsauth2.introweb.nl, nsauth3.introweb.net
NS in the zone
nsauth1.introweb.nl, nsauth2.introweb.nl, nsauth3.introweb.net
NameserverAddressesNetwork (AS)Glue
nsauth1.introweb.nl80.65.96.48 2001:1690:1:a::aAS20847 PREVIDER-AS - Previder B.V., NL AS20847 PREVIDER-AS - Previder B.V., NL80.65.96.48 2001:1690:1:a::a
nsauth2.introweb.nl86.105.160.91 2a0d:8600:1::5aAS205185 DCSPINE - Eurofiber Cloud Infra B.V., NL AS205185 DCSPINE - Eurofiber Cloud Infra B.V., NL86.105.160.91 2a0d:8600:1::5a
nsauth3.introweb.net62.165.127.221 2001:1690:1:c::aAS20847 PREVIDER-AS - Previder B.V., NL AS20847 PREVIDER-AS - Previder B.V., NL-

Checks

  • ✓ 3 nameservers #6
    Delegated to nsauth1.introweb.nl, nsauth2.introweb.nl, nsauth3.introweb.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: AS205185 (DCSPINE - Eurofiber Cloud Infra B.V., NL): 2 addresses; AS20847 (PREVIDER-AS - Previder 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

warn

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
nsauth1.introweb.nl 80.65.96.48NOERROR, 10 ms, authoritativenoyes / yesrefusedPowerDNS 3.11 for Workgroups
nsauth1.introweb.nl 2001:1690:1:a::aNOERROR, 11 ms, authoritativenoyes / yesrefusedPowerDNS 3.11 for Workgroups
nsauth2.introweb.nl 86.105.160.91NOERROR, 13 ms, authoritativenoyes / yesrefusedPowerDNS 3.11 for Workgroups
nsauth2.introweb.nl 2a0d:8600:1::5aNOERROR, 13 ms, authoritativenoyes / yesrefusedPowerDNS 3.11 for Workgroups
nsauth3.introweb.net 62.165.127.221NOERROR, 10 ms, authoritativenoyes / yesrefusedPowerDNS 3.11 for Workgroups
nsauth3.introweb.net 2001:1690:1:c::aNOERROR, 11 ms, authoritativenoyes / yesrefusedPowerDNS 3.11 for Workgroups

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: nsauth1.introweb.nl: "PowerDNS 3.11 for Workgroups"; nsauth2.introweb.nl: "PowerDNS 3.11 for Workgroups"; nsauth3.introweb.net: "PowerDNS 3.11 for Workgroups". 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 2026052702 · primary nsauth1.introweb.nl

Found

Primary (MNAME)
nsauth1.introweb.nl
Contact (RNAME)
postmaster.introweb.nl
Serial
2026052702
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
nsauth1.introweb.nl (80.65.96.48)2026052702
nsauth1.introweb.nl (2001:1690:1:a::a)2026052702
nsauth2.introweb.nl (86.105.160.91)2026052702
nsauth2.introweb.nl (2a0d:8600:1::5a)2026052702
nsauth3.introweb.net (62.165.127.221)2026052702
nsauth3.introweb.net (2001:1690:1:c::a)2026052702

Checks

  • ✓ Serial 2026052702 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver nsauth1.introweb.nl is one of the listed nameservers.
  • ✓ Contact postmaster@introweb.nl #25
    The SOA RNAME postmaster.introweb.nl means postmaster@introweb.nl.
  • ✓ Date-based serial #26
    The serial 2026052702 follows the YYYYMMDDnn convention (2026-05-27).

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

info

9 records at the apex

Found

Read from
80.65.96.48:53
TypeValueTTL
SOAnsauth1.introweb.nl. postmaster.introweb.nl. 2026052702 28800 7200 604800 864003599
NSnsauth3.introweb.net.3599
NSnsauth2.introweb.nl.3599
NSnsauth1.introweb.nl.3599
A84.241.175.233600
MX0 sans-nl.mail.protection.outlook.com.3600
TXT"MS=ms46757555"3600
TXT"google-site-verification=vN_7gzQC5zkvPKn7ybYogzouraqf3-2vnwuMW7Ck96g"3600
TXT"v=spf1 a:sansonlineweb.svr.previder.nl a:sansservice.svr.previder.nl ip4:83.96.253.144 ip4:18.158.225.191 ip4:145.131.10.247 ip4:178.251.197.86 ip4:178.251.197.88 include:trustpilotservice.com include:_spf.yourfilter.nl include:spf.protection.outlook.com " "include:spf.eu.exclaimer.net ~all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 59m59s. The NS TTL at the parent is 1h and in the zone 59m59s; 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