rtlxl.nl

Checked 22 October 2026, 15:42 UTC · via 8.8.8.8
!Passed with warnings
21 passed 3 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/rtlxl.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/rtlxl.nl returned HTTP 429
    #3

Delegation

info

a1-79.akam.net, a11-66.akam.net, a16-67.akam.net, a2-65.akam.net, a4-65.akam.net, a7-65.akam.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
a1-79.akam.net, a11-66.akam.net, a16-67.akam.net, a2-65.akam.net, a4-65.akam.net, a7-65.akam.net
NS in the zone
a1-79.akam.net, a11-66.akam.net, a16-67.akam.net, a2-65.akam.net, a4-65.akam.net, a7-65.akam.net
NameserverAddressesNetwork (AS)Glue
a1-79.akam.net193.108.91.79 2600:1401:2::4fAS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a11-66.akam.net84.53.139.66 2600:1480:1::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a16-67.akam.net23.211.132.67 2600:1406:1b::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a2-65.akam.net95.100.174.65 2600:1480:7000::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a4-65.akam.net72.246.46.65 2600:1480:9000::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a7-65.akam.net23.61.199.65 2600:1406:32::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-79.akam.net, a11-66.akam.net, a16-67.akam.net, a2-65.akam.net, a4-65.akam.net, a7-65.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.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 12 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • 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
a1-79.akam.net 193.108.91.79NOERROR, 3 ms, authoritativenoyes / yesrefused41824.6
a1-79.akam.net 2600:1401:2::4fNOERROR, 3 ms, authoritativenoyes / yesrefused41824.8
a11-66.akam.net 84.53.139.66NOERROR, 3 ms, authoritativenoyes / yesrefused41824.10
a11-66.akam.net 2600:1480:1::42NOERROR, 3 ms, authoritativenoyes / yesrefused41824.5
a16-67.akam.net 23.211.132.67NOERROR, 3 ms, authoritativenoyes / yesrefused48878.32
a16-67.akam.net 2600:1406:1b::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.30
a2-65.akam.net 95.100.174.65NOERROR, 3 ms, authoritativenoyes / yesrefused48878.31
a2-65.akam.net 2600:1480:7000::41NOERROR, 3 ms, authoritativenoyes / yesrefused48878.26
a4-65.akam.net 72.246.46.65NOERROR, 3 ms, authoritativenoyes / yesrefused48878.27
a4-65.akam.net 2600:1480:9000::41NOERROR, 3 ms, authoritativenoyes / yesrefused48878.27
a7-65.akam.net 23.61.199.65NOERROR, 3 ms, authoritativenoyes / yesrefused41824.10
a7-65.akam.net 2600:1406:32::41NOERROR, 3 ms, authoritativenoyes / yesrefused41824.4

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: a1-79.akam.net: "41824.6"; a1-79.akam.net: "41824.8"; a11-66.akam.net: "41824.10"; a11-66.akam.net: "41824.5"; a16-67.akam.net: "48878.32"; a16-67.akam.net: "48878.30"; a2-65.akam.net: "48878.31"; a2-65.akam.net: "48878.26"; a4-65.akam.net: "48878.27"; a7-65.akam.net: "41824.10"; a7-65.akam.net: "41824.4". 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 2026011309 · primary a1-79.akam.net

Found

Primary (MNAME)
a1-79.akam.net
Contact (RNAME)
hostmaster.rtlxl.nl
Serial
2026011309
Refresh / retry
3600 s / 600 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
a1-79.akam.net (193.108.91.79)2026011309
a1-79.akam.net (2600:1401:2::4f)2026011309
a11-66.akam.net (84.53.139.66)2026011309
a11-66.akam.net (2600:1480:1::42)2026011309
a16-67.akam.net (23.211.132.67)2026011309
a16-67.akam.net (2600:1406:1b::43)2026011309
a2-65.akam.net (95.100.174.65)2026011309
a2-65.akam.net (2600:1480:7000::41)2026011309
a4-65.akam.net (72.246.46.65)2026011309
a4-65.akam.net (2600:1480:9000::41)2026011309
a7-65.akam.net (23.61.199.65)2026011309
a7-65.akam.net (2600:1406:32::41)2026011309

Checks

  • ✓ Serial 2026011309 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 a1-79.akam.net is one of the listed nameservers.
  • ✓ Contact hostmaster@rtlxl.nl #25
    The SOA RNAME hostmaster.rtlxl.nl means hostmaster@rtlxl.nl.
  • ✓ Date-based serial #26
    The serial 2026011309 follows the YYYYMMDDnn convention (2026-01-13).

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

14 records at the apex

Found

Read from
193.108.91.79:53
TypeValueTTL
SOAa1-79.akam.net. hostmaster.rtlxl.nl. 2026011309 3600 600 604800 30086400
NSa2-65.akam.net.86400
NSa11-66.akam.net.86400
NSa16-67.akam.net.86400
NSa1-79.akam.net.86400
NSa7-65.akam.net.86400
NSa4-65.akam.net.86400
A2.23.176.17320
A2.23.176.17920
AAAA2a02:26f0:b700:14::215:6ed220
AAAA2a02:26f0:b700:14::215:6ecd20
MX10 a892804.mx.mailhop.org.14400
MX20 mx1.mailhop.org.14400
TXT"_v248lhtd9tnz3faygwykbfzu4zxbsaf"14400

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (20s), AAAA (20s). 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