kuleuven.ac.be

Checked 22 October 2026, 06:41 UTC · via 8.8.8.8
!Passed with warnings
21 passed 2 warnings 0 failed 6 info

Registration

info

.be country-code

Found

TLD
.be (country-code)
Public suffix
.ac.be
ICANN policies apply
no

Checks

  • i
    .be 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. Domains are registered under the public suffix .ac.be.
    #1
  • ✓ TLD delegated and signed #2
    .be is delegated in the root zone and DNSSEC-signed.
  • i
    Registration data not available
    No registration data via RDAP: the registry of .be offers no RDAP service. Many ccTLD registries don't offer RDAP; check the registry's WHOIS instead.
    #3

Delegation

warn

dns1.kulnet.kuleuven.be, dns2.kulnet.kuleuven.be

Found

Parent zone
ac.be
Delegation from
ns1.belnet.be (193.190.198.14)
NS at the parent
dns1.kulnet.kuleuven.be, dns2.kulnet.kuleuven.be
NS in the zone
dns1.kulnet.kuleuven.be, dns2.kulnet.kuleuven.be
NameserverAddressesNetwork (AS)Glue
dns1.kulnet.kuleuven.be134.58.126.5 2a02:2c40:0:40::53:5AS2611 BELNET - BELNET, BE AS2611 BELNET - BELNET, BE-
dns2.kulnet.kuleuven.be134.58.126.6 2a02:2c40:0:40::53:6AS2611 BELNET - BELNET, BE AS2611 BELNET - BELNET, BE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns1.kulnet.kuleuven.be, dns2.kulnet.kuleuven.be.
    #6
  • ✓ 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 one network
    all IPv4 addresses are in 134.58.126.0/24; all IPv6 addresses are in 2a02:2c40::/48. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS2611 (BELNET - BELNET, BE): 4 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 .be
    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

pass

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.kulnet.kuleuven.be 134.58.126.5NOERROR, 18 ms, authoritativenoyes / yesrefused-
dns1.kulnet.kuleuven.be 2a02:2c40:0:40::53:5NOERROR, 19 ms, authoritativenoyes / yesrefused-
dns2.kulnet.kuleuven.be 134.58.126.6NOERROR, 18 ms, authoritativenoyes / yesrefused-
dns2.kulnet.kuleuven.be 2a02:2c40:0:40::53:6NOERROR, 19 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 4 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 2025102200 · primary dns2.kulnet.kuleuven.be

Found

Primary (MNAME)
dns2.kulnet.kuleuven.be
Contact (RNAME)
postmaster.kulnet.kuleuven.ac.be
Serial
2025102200
Refresh / retry
10800 s / 1800 s
Expire
3600000 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
dns1.kulnet.kuleuven.be (134.58.126.5)2025102200
dns1.kulnet.kuleuven.be (2a02:2c40:0:40::53:5)2025102200
dns2.kulnet.kuleuven.be (134.58.126.6)2025102200
dns2.kulnet.kuleuven.be (2a02:2c40:0:40::53:6)2025102200

Checks

  • ✓ Serial 2025102200 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 30m, expire 1000h, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns2.kulnet.kuleuven.be is one of the listed nameservers.
  • ✓ Contact postmaster@kulnet.kuleuven.ac.be #25
    The SOA RNAME postmaster.kulnet.kuleuven.ac.be means postmaster@kulnet.kuleuven.ac.be.
  • ✓ Date-based serial #26
    The serial 2025102200 follows the YYYYMMDDnn convention (2025-10-22).

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

info

10 records at the apex

Found

Read from
134.58.126.5:53
TypeValueTTL
SOAdns2.kulnet.kuleuven.be. postmaster.kulnet.kuleuven.ac.be. 2025102200 10800 1800 3600000 8640086400
NSdns1.kulnet.kuleuven.be.86400
NSdns2.kulnet.kuleuven.be.86400
A134.58.64.1586400
MX20 kromsin.cc.kuleuven.ac.be.86400
MX10 cavin.kuleuven.be.86400
MX30 cavin02.kuleuven.be.86400
MX20 limbak.cc.kuleuven.ac.be.86400
MX30 cavin03.kuleuven.be.86400
MX30 cavin01.kuleuven.be.86400

Checks

  • ✓ TTLs within range #32
    TTLs: A 1d, MX 1d, 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