icct.nl

Checked 21 October 2026, 21:22 UTC · via 8.8.8.8
!Passed with warnings
25 passed 2 warnings 0 failed 8 info

Registration

info

.nl country-code · Combell B.V.

Found

TLD
.nl (country-code)
ICANN policies apply
no
Registrar
Combell B.V.
Registered
22 April 2010
Last changed
10 September 2024
Status
active
Registry nameservers
ns3.combell.net, ns4.combell.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

warn

ns3.combell.net, ns4.combell.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns3.combell.net, ns4.combell.net
NS in the zone
ns1.combell.eu, ns3.combell.net, ns4.combell.net
NameserverAddressesNetwork (AS)Glue
ns1.combell.eu (zone only)89.44.166.48 2a00:1c98:50::50AS34762 COMBELL-AS - Combell NV, BE AS34762 COMBELL-AS - Combell NV, BE-
ns3.combell.net83.217.73.172 2a00:1c98::53:1AS34762 COMBELL-AS - Combell NV, BE AS34762 COMBELL-AS - Combell NV, BE-
ns4.combell.net86.39.202.67 2001:1598:0:101::3AS28747 EASYHOST-COLO-AS - Easyhost BVBA, BE AS28747 EASYHOST-COLO-AS - Easyhost BVBA, BE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns3.combell.net, ns4.combell.net.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: ns1.combell.eu. ns1.combell.eu, ns3.combell.net, ns4.combell.net report NS ns1.combell.eu ns3.combell.net ns4.combell.net.
    #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: AS28747 (EASYHOST-COLO-AS - Easyhost BVBA, BE): 2 addresses; AS34762 (COMBELL-AS - Combell NV, BE): 4 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

info

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.combell.eu 89.44.166.48NOERROR, 10 ms, authoritativenoyes / yesrefusedYou are on a need to know basis
ns1.combell.eu 2a00:1c98:50::50NOERROR, 10 ms, authoritativenoyes / yesrefusedYou are on a need to know basis
ns3.combell.net 83.217.73.172NOERROR, 14 ms, authoritativenoyes / yesrefusedYou are on a need to know basis
ns3.combell.net 2a00:1c98::53:1NOERROR, 14 ms, authoritativenoyes / yesrefusedYou are on a need to know basis
ns4.combell.net 86.39.202.67NOERROR, 13 ms, authoritativenoyes / yesrefusedYou are on a need to know basis
ns4.combell.net 2001:1598:0:101::3NOERROR, 14 ms, authoritativenoyes / yesrefusedYou are on a need to know basis

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns1.combell.eu: "You are on a need to know basis"; ns3.combell.net: "You are on a need to know basis"; ns4.combell.net: "You are on a need to know basis".
    #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 1779920140 · primary ns3.combell.net

Found

Primary (MNAME)
ns3.combell.net
Contact (RNAME)
hostmaster.icct.nl
Serial
1779920140
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
40000 s

Serial per nameserver

NameserverSerial
ns1.combell.eu (89.44.166.48)1779920140
ns1.combell.eu (2a00:1c98:50::50)1779920140
ns3.combell.net (83.217.73.172)1779920140
ns3.combell.net (2a00:1c98::53:1)1779920140
ns4.combell.net (86.39.202.67)1779920140
ns4.combell.net (2001:1598:0:101::3)1779920140

Checks

  • ✓ Serial 1779920140 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 11h6m40s.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns3.combell.net is one of the listed nameservers.
  • ✓ Contact hostmaster@icct.nl #25
    The SOA RNAME hostmaster.icct.nl means hostmaster@icct.nl.
  • ✓ Timestamp serial #26
    The serial 1779920140 is a Unix timestamp (2026-05-27 22:15 UTC).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
5 iterations, 4-byte salt
Signatures valid until
29 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
63260ECDSAP256SHA256 (13)SHA256 F4166B7C14B1A6EE…yes

DNSKEY in the zone

Key tagRoleAlgorithm
63260KSK (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 63260 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Signatures valid until 2026-10-29 #30
    The earliest DNSKEY/SOA signature expires at 2026-10-29 00:00 UTC.
  • !
    NSEC3 with extra iterations or salt
    NSEC3 uses 5 iterations and a 4-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.
    #31

Records

info

11 records at the apex

Found

Read from
89.44.166.48:53
TypeValueTTL
SOAns3.combell.net. hostmaster.icct.nl. 1779920140 10800 3600 604800 400003600
NSns3.combell.net.3600
NSns4.combell.net.3600
NSns1.combell.eu.3600
A37.97.132.89600
AAAA2a01:7c8:aabc:d3:5054:ff:fe9e:71803600
MX20 d317180.b.ess.de.barracudanetworks.com.300
MX10 d317180.a.ess.de.barracudanetworks.com.300
TXT"MS=ms25500754"3600
TXT"v=spf1 include:spf.protection.outlook.com include:_spf.transip.email ~all"300
TXT"google-site-verification=XDHLWMg3PUqHJOVdkLiJ2KqWpnvWuFZlCaJRP8Na1qw"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, AAAA 1h, MX 5m, NS 1h.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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