cbr.nl

Checked 21 October 2026, 21:00 UTC · via 8.8.8.8
!Passed with warnings
28 passed 1 warning 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/cbr.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/cbr.nl returned HTTP 429
    #3

Delegation

info

a1-26.akam.net, a11-66.akam.net, a22-67.akam.net, a4-66.akam.net, a6-66.akam.net, a7-65.akam.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
a1-26.akam.net, a11-66.akam.net, a22-67.akam.net, a4-66.akam.net, a6-66.akam.net, a7-65.akam.net
NS in the zone
a1-26.akam.net, a11-66.akam.net, a22-67.akam.net, a4-66.akam.net, a6-66.akam.net, a7-65.akam.net
NameserverAddressesNetwork (AS)Glue
a1-26.akam.net193.108.91.26 2600:1401:2::1aAS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a11-66.akam.net84.53.139.66 2600:1480:1::42AS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a22-67.akam.net23.211.61.67 2600:1480:7800::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a4-66.akam.net72.246.46.66 2600:1480:9000::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a6-66.akam.net23.211.133.66 2600:1401:1::42AS21342 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 a1-26.akam.net, a11-66.akam.net, a22-67.akam.net, a4-66.akam.net, a6-66.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.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20940 (AKAMAI-ASN1 - Akamai International B.V., NL): 2 addresses; AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 10 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
a1-26.akam.net 193.108.91.26NOERROR, 3 ms, authoritativenoyes / yesrefused41824.7
a1-26.akam.net 2600:1401:2::1aNOERROR, 4 ms, authoritativenoyes / yesrefused41824.5
a11-66.akam.net 84.53.139.66NOERROR, 4 ms, authoritativenoyes / yesrefused41824.7
a11-66.akam.net 2600:1480:1::42NOERROR, 4 ms, authoritativenoyes / yesrefused41824.8
a22-67.akam.net 23.211.61.67NOERROR, 3 ms, authoritativenoyes / yesrefused48878.33
a22-67.akam.net 2600:1480:7800::43NOERROR, 3 ms, authoritativenoyes / yesrefused48878.27
a4-66.akam.net 72.246.46.66NOERROR, 3 ms, authoritativenoyes / yesrefused48878.30
a4-66.akam.net 2600:1480:9000::42NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a6-66.akam.net 23.211.133.66NOERROR, 4 ms, authoritativenoyes / yesrefused48878.32
a6-66.akam.net 2600:1401:1::42NOERROR, 4 ms, authoritativenoyes / yesrefused48878.26
a7-65.akam.net 23.61.199.65NOERROR, 4 ms, authoritativenoyes / yesrefused41824.6
a7-65.akam.net 2600:1406:32::41NOERROR, 4 ms, authoritativenoyes / yesrefused41824.9

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: a1-26.akam.net: "41824.7"; a1-26.akam.net: "41824.5"; a11-66.akam.net: "41824.7"; a11-66.akam.net: "41824.8"; a22-67.akam.net: "48878.33"; a22-67.akam.net: "48878.27"; a4-66.akam.net: "48878.30"; a4-66.akam.net: "48878.31"; a6-66.akam.net: "48878.32"; a6-66.akam.net: "48878.26"; a7-65.akam.net: "41824.6"; a7-65.akam.net: "41824.9". 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 2022121805 · primary a1-26.akam.net

Found

Primary (MNAME)
a1-26.akam.net
Contact (RNAME)
hostmaster.cbr.nl
Serial
2022121805
Refresh / retry
3600 s / 600 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
a1-26.akam.net (193.108.91.26)2022121805
a1-26.akam.net (2600:1401:2::1a)2022121805
a11-66.akam.net (84.53.139.66)2022121805
a11-66.akam.net (2600:1480:1::42)2022121805
a22-67.akam.net (23.211.61.67)2022121805
a22-67.akam.net (2600:1480:7800::43)2022121805
a4-66.akam.net (72.246.46.66)2022121805
a4-66.akam.net (2600:1480:9000::42)2022121805
a6-66.akam.net (23.211.133.66)2022121805
a6-66.akam.net (2600:1401:1::42)2022121805
a7-65.akam.net (23.61.199.65)2022121805
a7-65.akam.net (2600:1406:32::41)2022121805

Checks

  • ✓ Serial 2022121805 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 a1-26.akam.net is one of the listed nameservers.
  • ✓ Contact hostmaster@cbr.nl #25
    The SOA RNAME hostmaster.cbr.nl means hostmaster@cbr.nl.
  • ✓ Date-based serial #26
    The serial 2022121805 follows the YYYYMMDDnn convention (2022-12-18).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
0 iterations, 0-byte salt
Signatures valid until
24 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
57564ECDSAP256SHA256 (13)SHA256 86AE9D9E88EDCD3A…yes

DNSKEY in the zone

Key tagRoleAlgorithm
48285ZSK (256)ECDSAP256SHA256 (13)
57564KSK (257)ECDSAP256SHA256 (13)
31342ZSK (256)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 57564 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 73h0m0s and created on demand; the current one was made at 2026-10-21 09:19 UTC and expires at 2026-10-24 10:19 UTC.
  • ✓ NSEC3 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

info

18 records at the apex

Found

Read from
193.108.91.26:53
TypeValueTTL
SOAa1-26.akam.net. hostmaster.cbr.nl. 2022121805 3600 600 604800 30086400
NSa4-66.akam.net.86400
NSa6-66.akam.net.86400
NSa1-26.akam.net.86400
NSa7-65.akam.net.86400
NSa22-67.akam.net.86400
NSa11-66.akam.net.86400
A62.58.93.933600
AAAA2a04:9a00:1118:3:6258:9300:4:93600
MX50 smtp.cbr.nl.3600
MX100 smtp2.cbr.nl.3600
TXT"bw=KTRv74fdPN1NQmKRn7nP6SYTclqbKYMgb72QiMRkKCaV"3600
TXT"brevo-code:0d4a50917f0993dc19449efefa10df39"3600
TXT"MS=ms93517380"3600
TXT"Dynatrace-site-verification=ead61fe0-3fec-43ac-836a-2abd1c112718__qft4upa8141os9muhe121na521"3600
TXT"v=spf1 ip4:3.123.206.219 ip4:3.68.129.51 include:spf1.cbr.nl include:spf.topdesk.net include:spf.floydhamilton.net include:spf.protection.outlook.com include:_spf.zivver.com include:spf.winkwaves.net include:mailservers.expoints.nl" " include:_spf.eu.mailgun.org -all"3600
TXT"ms-domain-verification=0a44e7a5-74cd-4e34-b765-6463a7466761"3600
TXT"4/mmyssMMJ1TQC7XLyh+rAS9VcxY7XwMvCy3K8izA0S8v1q17n+RU0IvSFNzZNiTnd80wknZyewThvU8DneDzQ=="3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, AAAA 10m, MX 1h, NS 1d. The NS TTL at the parent is 1h and in the zone 1d; 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