nsinternational.nl

Checked 22 October 2026, 15:01 UTC · via 8.8.8.8
!Passed with warnings
26 passed 2 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/nsinternational.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/nsinternational.nl returned HTTP 429
    #3

Delegation

info

a1-139.akam.net, a11-66.akam.net, a13-67.akam.net, a20-64.akam.net, a24-65.akam.net, a26-66.akam.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
a1-139.akam.net, a11-66.akam.net, a13-67.akam.net, a20-64.akam.net, a24-65.akam.net, a26-66.akam.net
NS in the zone
a1-139.akam.net, a11-66.akam.net, a13-67.akam.net, a20-64.akam.net, a24-65.akam.net, a26-66.akam.net
NameserverAddressesNetwork (AS)Glue
a1-139.akam.net193.108.91.139 2600:1401:2::8bAS21342 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-
a13-67.akam.net2.22.230.67 2600:1480:800::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a20-64.akam.net95.100.175.64 2a02:26f0:67::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a24-65.akam.net2.16.130.65 2600:1480:9800::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a26-66.akam.net23.74.25.66 2600:1480:b800::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-139.akam.net, a11-66.akam.net, a13-67.akam.net, a20-64.akam.net, a24-65.akam.net, a26-66.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
a1-139.akam.net 193.108.91.139NOERROR, 4 ms, authoritativenoyes / yesrefused41824.10
a1-139.akam.net 2600:1401:2::8bNOERROR, 4 ms, authoritativenoyes / yesrefused41824.5
a11-66.akam.net 84.53.139.66NOERROR, 4 ms, authoritativenoyes / yesrefused41824.11
a11-66.akam.net 2600:1480:1::42NOERROR, 4 ms, authoritativenoyes / yesrefused41824.11
a13-67.akam.net 2.22.230.67NOERROR, 5 ms, authoritativenoyes / yesrefused41824.5
a13-67.akam.net 2600:1480:800::43NOERROR, 5 ms, authoritativenoyes / yesrefused41824.7
a20-64.akam.net 95.100.175.64NOERROR, 4 ms, authoritativenoyes / yesrefused48878.26
a20-64.akam.net 2a02:26f0:67::40NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a24-65.akam.net 2.16.130.65NOERROR, 3 ms, authoritativenoyes / yesrefused48878.31
a24-65.akam.net 2600:1480:9800::41NOERROR, 4 ms, authoritativenoyes / yesrefused48878.26
a26-66.akam.net 23.74.25.66NOERROR, 4 ms, authoritativenoyes / yesrefused48878.26
a26-66.akam.net 2600:1480:b800::42NOERROR, 5 ms, authoritativenoyes / yesrefused48878.27

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: a1-139.akam.net: "41824.10"; a1-139.akam.net: "41824.5"; a11-66.akam.net: "41824.11"; a13-67.akam.net: "41824.5"; a13-67.akam.net: "41824.7"; a20-64.akam.net: "48878.26"; a20-64.akam.net: "48878.33"; a24-65.akam.net: "48878.31"; a24-65.akam.net: "48878.26"; a26-66.akam.net: "48878.26"; a26-66.akam.net: "48878.27". 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 1562309633 · primary a1-139.akam.net

Found

Primary (MNAME)
a1-139.akam.net
Contact (RNAME)
hostmaster.akamai.com
Serial
1562309633
Refresh / retry
43200 s / 7200 s
Expire
604800 s
Negative TTL
7200 s

Serial per nameserver

NameserverSerial
a1-139.akam.net (193.108.91.139)1562309633
a1-139.akam.net (2600:1401:2::8b)1562309633
a11-66.akam.net (84.53.139.66)1562309633
a11-66.akam.net (2600:1480:1::42)1562309633
a13-67.akam.net (2.22.230.67)1562309633
a13-67.akam.net (2600:1480:800::43)1562309633
a20-64.akam.net (95.100.175.64)1562309633
a20-64.akam.net (2a02:26f0:67::40)1562309633
a24-65.akam.net (2.16.130.65)1562309633
a24-65.akam.net (2600:1480:9800::41)1562309633
a26-66.akam.net (23.74.25.66)1562309633
a26-66.akam.net (2600:1480:b800::42)1562309633

Checks

  • ✓ Serial 1562309633 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 2h, expire 7d, negative TTL 2h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver a1-139.akam.net is one of the listed nameservers.
  • ✓ Contact hostmaster@akamai.com #25
    The SOA RNAME hostmaster.akamai.com means hostmaster@akamai.com.
  • ✓ Timestamp serial #26
    The serial 1562309633 is a Unix timestamp (2019-07-05 06:53 UTC).

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
25 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
1589RSASHA256 (8)SHA256 DCE29FB873460D48…yes

DNSKEY in the zone

Key tagRoleAlgorithm
14ZSK (256)RSASHA256 (8)
1589KSK (257)RSASHA256 (8)
49761ZSK (256)RSASHA256 (8)

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 1589 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: RSASHA256 (8).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 73h0m0s and created on demand; the current one was made at 2026-10-22 01:24 UTC and expires at 2026-10-25 02:24 UTC.
  • ✓ NSEC3 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

warn

19 records at the apex

Found

Read from
193.108.91.139:53
TypeValueTTL
SOAa1-139.akam.net. hostmaster.akamai.com. 1562309633 43200 7200 604800 720086400
NSa11-66.akam.net.7200
NSa1-139.akam.net.7200
NSa20-64.akam.net.7200
NSa24-65.akam.net.7200
NSa26-66.akam.net.7200
NSa13-67.akam.net.7200
A2.21.239.15520
A2.21.239.13820
TXT"v=spf1 -all"36010
TXT"_e9ctumc7htlncecivlngilknrqnia42"36010
TXT"e279340ef2a8375a2c1e90a0b6f81c3d95ce87ae3ee12c4e57a263bce808aa23"36010
TXT"MS=ms20055440"36010
TXT"521fe833b4eb1867747f13a9000c189f09a497a76f6e41cc5233c0d33755438d"36010
TXT"1bbba961037e1ec56bee7655de1a798345725dad6699bb3cc4f9ea3f785c7efb"36010
TXT"_gq3qqimzbsjubsqmhjtq38hxq72cyub"36010
TXT"4f376b72d5f3c172aac70cfa715610c9ae9f24e7b82e01c9a0d576c5e8aedf22"36010
TXT"_azi64opa06yumrp8tua4f3pakao7x68"36010
TXT"e7da24cb21e462400a4fa1a95fdb75cf2b8b30e8b5cc62dbfd789a95215b8336"36010

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 2h; 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