tcsamsterdammarathon.nl

Checked 22 October 2026, 16:30 UTC · via 8.8.8.8
!Passed with warnings
21 passed 4 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/tcsamsterdammarathon.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/tcsamsterdammarathon.nl returned HTTP 429
    #3

Delegation

warn

nsauth2.trans-ix.net, nsauth3.trans-ix.com

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
nsauth2.trans-ix.net, nsauth3.trans-ix.com
NS in the zone
nsauth1.trans-ix.nl, nsauth2.trans-ix.net, nsauth3.trans-ix.com
NameserverAddressesNetwork (AS)Glue
nsauth1.trans-ix.nl (zone only)185.40.56.120 2a01:4d60:1:705::120AS30870 TRANS-IX-AS - Trans-iX B.V., NL AS30870 TRANS-IX-AS - Trans-iX B.V., NL-
nsauth2.trans-ix.net185.108.117.31 2a06:4a80:117::31AS30870 TRANS-IX-AS - Trans-iX B.V., NL AS30870 TRANS-IX-AS - Trans-iX B.V., NL-
nsauth3.trans-ix.com37.97.162.245 2a01:7c8:bb01:851:5054:ff:feb6:6f70AS20857 TRANSIP-AS - Signet B.V., NL AS20857 TRANSIP-AS - Signet B.V., NL-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: nsauth2.trans-ix.net, nsauth3.trans-ix.com.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: nsauth1.trans-ix.nl. nsauth1.trans-ix.nl, nsauth2.trans-ix.net, nsauth3.trans-ix.com report NS nsauth1.trans-ix.nl nsauth2.trans-ix.net nsauth3.trans-ix.com.
    #7
  • ✓ 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.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20857 (TRANSIP-AS - Signet B.V., NL): 2 addresses; AS30870 (TRANS-IX-AS - Trans-iX B.V., NL): 4 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .net.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
nsauth1.trans-ix.nl 185.40.56.120NOERROR, 10 ms, authoritativenoyes / yesrefused9.18.39-0ubuntu0.22.04.7-Ubuntu
nsauth1.trans-ix.nl 2a01:4d60:1:705::120NOERROR, 10 ms, authoritativenoyes / yesrefused9.18.39-0ubuntu0.22.04.7-Ubuntu
nsauth2.trans-ix.net 185.108.117.31NOERROR, 9 ms, authoritativenoyes / yesrefused9.18.39-0ubuntu0.22.04.7-Ubuntu
nsauth2.trans-ix.net 2a06:4a80:117::31NOERROR, 13 ms, authoritativenoyes / yesrefused9.18.39-0ubuntu0.22.04.7-Ubuntu
nsauth3.trans-ix.com 37.97.162.245NOERROR, 11 ms, authoritativenoyes / yesrefused9.18.30-0ubuntu0.20.04.2-Ubuntu
nsauth3.trans-ix.com 2a01:7c8:bb01:851:5054:ff:feb6:6f70NOERROR, 11 ms, authoritativenoyes / yesrefused9.18.30-0ubuntu0.20.04.2-Ubuntu

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.trans-ix.nl: "9.18.39-0ubuntu0.22.04.7-Ubuntu"; nsauth2.trans-ix.net: "9.18.39-0ubuntu0.22.04.7-Ubuntu"; nsauth3.trans-ix.com: "9.18.30-0ubuntu0.20.04.2-Ubuntu". 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

warn

serial 2026041700 · primary nsauth2.trans-ix.net

Found

Primary (MNAME)
nsauth2.trans-ix.net
Contact (RNAME)
hostmaster.tcsamsterdammarathon.nl
Serial
2026041700
Refresh / retry
3600 s / 3600 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
nsauth1.trans-ix.nl (185.40.56.120)2026041700
nsauth1.trans-ix.nl (2a01:4d60:1:705::120)2026041700
nsauth2.trans-ix.net (185.108.117.31)2026041700
nsauth2.trans-ix.net (2a06:4a80:117::31)2026041700
nsauth3.trans-ix.com (37.97.162.245)2026041700
nsauth3.trans-ix.com (2a01:7c8:bb01:851:5054:ff:feb6:6f70)2026041700

Checks

  • ✓ Serial 2026041700 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 1h should be shorter than refresh 1h. Current values: refresh 1h, retry 1h, expire 14d, negative TTL 1d.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver nsauth2.trans-ix.net is one of the listed nameservers.
  • ✓ Contact hostmaster@tcsamsterdammarathon.nl #25
    The SOA RNAME hostmaster.tcsamsterdammarathon.nl means hostmaster@tcsamsterdammarathon.nl.
  • ✓ Date-based serial #26
    The serial 2026041700 follows the YYYYMMDDnn convention (2026-04-17).

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

6 records at the apex

Found

Read from
185.40.56.120:53
TypeValueTTL
SOAnsauth2.trans-ix.net. hostmaster.tcsamsterdammarathon.nl. 2026041700 3600 3600 1209600 864003600
NSnsauth1.trans-ix.nl.301
NSnsauth2.trans-ix.net.301
NSnsauth3.trans-ix.com.301
A87.233.68.167301
TXT"v=spf1 ip4:89.30.151.208/29 ip4:185.40.57.252 ~all"301

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m1s, NS 5m1s. The NS TTL at the parent is 1h and in the zone 5m1s; 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