ohra.nl

Checked 21 October 2026, 21:24 UTC · via 8.8.8.8
!Passed with warnings
29 passed 2 warnings 0 failed 4 info

Registration

info

.nl country-code · CSC Corporate Domains, Inc.

Found

TLD
.nl (country-code)
ICANN policies apply
no
Registrar
CSC Corporate Domains, Inc.
Registered
11 December 1995
Last changed
21 July 2026
Status
active
Registry nameservers
a1-220.akam.net, a13-65.akam.net, a2-66.akam.net, a20-67.akam.net, a26-64.akam.net, a7-65.akam.net
RDAP server
https://rdap.sidn.nl/

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
    Expiry date not published
    The registry does not publish the expiry date in RDAP. Check it with your registrar.
    #3
  • i
    No transfer lock
    The domain has no transfer lock (status: active). A registrar lock protects against unauthorized transfers.
    #4
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

a1-220.akam.net, a13-65.akam.net, a2-66.akam.net, a20-67.akam.net, a26-64.akam.net, a7-65.akam.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
a1-220.akam.net, a13-65.akam.net, a2-66.akam.net, a20-67.akam.net, a26-64.akam.net, a7-65.akam.net
NS in the zone
a1-220.akam.net, a13-65.akam.net, a2-66.akam.net, a20-67.akam.net, a26-64.akam.net, a7-65.akam.net
NameserverAddressesNetwork (AS)Glue
a1-220.akam.net193.108.91.220 2600:1401:2::dcAS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a13-65.akam.net2.22.230.65 2600:1480:800::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a2-66.akam.net95.100.174.66 2600:1480:7000::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a20-67.akam.net95.100.175.67 2a02:26f0:67::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a26-64.akam.net23.74.25.64 2600:1480:b800::40AS21342 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 a1-220.akam.net, a13-65.akam.net, a2-66.akam.net, a20-67.akam.net, a26-64.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): 1 address; AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 11 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
a1-220.akam.net 193.108.91.220NOERROR, 3 ms, authoritativenoyes / yesrefused41824.6
a1-220.akam.net 2600:1401:2::dcNOERROR, 4 ms, authoritativenoyes / yesrefused41824.8
a13-65.akam.net 2.22.230.65NOERROR, 3 ms, authoritativenoyes / yesrefused41824.10
a13-65.akam.net 2600:1480:800::41NOERROR, 5 ms, authoritativenoyes / yesrefused41824.4
a2-66.akam.net 95.100.174.66NOERROR, 3 ms, authoritativenoyes / yesrefused48878.32
a2-66.akam.net 2600:1480:7000::42NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a20-67.akam.net 95.100.175.67NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a20-67.akam.net 2a02:26f0:67::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.27
a26-64.akam.net 23.74.25.64NOERROR, 3 ms, authoritativenoyes / yesrefused48878.32
a26-64.akam.net 2600:1480:b800::40NOERROR, 4 ms, authoritativenoyes / yesrefused48878.32
a7-65.akam.net 23.61.199.65NOERROR, 4 ms, authoritativenoyes / yesrefused41824.9
a7-65.akam.net 2600:1406:32::41NOERROR, 4 ms, authoritativenoyes / yesrefused41824.10

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: a1-220.akam.net: "41824.6"; a1-220.akam.net: "41824.8"; a13-65.akam.net: "41824.10"; a13-65.akam.net: "41824.4"; a2-66.akam.net: "48878.32"; a2-66.akam.net: "48878.31"; a20-67.akam.net: "48878.31"; a20-67.akam.net: "48878.27"; a26-64.akam.net: "48878.32"; a7-65.akam.net: "41824.9"; a7-65.akam.net: "41824.10". 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 2019092172 · primary a1-220.akam.net

Found

Primary (MNAME)
a1-220.akam.net
Contact (RNAME)
hostmaster.ohra.nl
Serial
2019092172
Refresh / retry
3600 s / 600 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
a1-220.akam.net (193.108.91.220)2019092172
a1-220.akam.net (2600:1401:2::dc)2019092172
a13-65.akam.net (2.22.230.65)2019092172
a13-65.akam.net (2600:1480:800::41)2019092172
a2-66.akam.net (95.100.174.66)2019092172
a2-66.akam.net (2600:1480:7000::42)2019092172
a20-67.akam.net (95.100.175.67)2019092172
a20-67.akam.net (2a02:26f0:67::43)2019092172
a26-64.akam.net (23.74.25.64)2019092172
a26-64.akam.net (2600:1480:b800::40)2019092172
a7-65.akam.net (23.61.199.65)2019092172
a7-65.akam.net (2600:1406:32::41)2019092172

Checks

  • ✓ Serial 2019092172 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 a1-220.akam.net is one of the listed nameservers.
  • ✓ Contact hostmaster@ohra.nl #25
    The SOA RNAME hostmaster.ohra.nl means hostmaster@ohra.nl.
  • ✓ Date-based serial #26
    The serial 2019092172 follows the YYYYMMDDnn convention (2019-09-21).

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
9825ECDSAP256SHA256 (13)SHA256 28265E289BFD4ADA…yes

DNSKEY in the zone

Key tagRoleAlgorithm
35640ZSK (256)ECDSAP256SHA256 (13)
46228ZSK (256)ECDSAP256SHA256 (13)
9825KSK (257)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 9825 (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 09:51 UTC and expires at 2026-10-24 10:51 UTC.
  • ✓ NSEC3 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

warn

18 records at the apex

Found

Read from
193.108.91.220:53
TypeValueTTL
SOAa1-220.akam.net. hostmaster.ohra.nl. 2019092172 3600 600 604800 30086400
NSa20-67.akam.net.86400
NSa2-66.akam.net.86400
NSa26-64.akam.net.86400
NSa7-65.akam.net.86400
NSa13-65.akam.net.86400
NSa1-220.akam.net.86400
A2.16.204.1220
A2.16.204.2320
AAAA2a02:26f0:b700:5::210:cc1720
AAAA2a02:26f0:b700:5::210:cc0c20
MX10 ohra-nl.c-v1.mx.microsoft.300
TXT"google-site-verification=YS28X6JAbg7SoEvUoRnbecrcwZfQpXpsTxRmL822gwM"300
TXT"v=spf1 ip4:83.80.22.43 a:sweeper.stater.com exists:%{i}._spf.mta.salesforce.com include:spf.insim.biz include:spf.flowmailer.net include:spf.iwelcome.com -all"300
CAA0 issuewild ";"300
CAA0 iodef "mailto:it.security.pki@nn-group.com"300
CAA0 issue "globalsign.com"300
CAA0 issue "digicert.com"300

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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: none (issuance forbidden), globalsign.com, digicert.com.