kuleuven.be

Checked 22 October 2026, 06:41 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 warnings 0 failed 5 info

Registration

info

.be country-code

Found

TLD
.be (country-code)
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.
    #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
be
Delegation from
a.nsset.be (194.0.6.1)
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, BE134.58.126.5 2a02:2c40:0:40::53:5
dns2.kulnet.kuleuven.be134.58.126.6 2a02:2c40:0:40::53:6AS2611 BELNET - BELNET, BE AS2611 BELNET - BELNET, BE134.58.126.6 2a02:2c40:0:40::53:6

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.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: dns1.kulnet.kuleuven.be, dns2.kulnet.kuleuven.be.
  • ✓ 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, 21 ms, authoritativenoyes / yesrefused-
dns1.kulnet.kuleuven.be 2a02:2c40:0:40::53:5NOERROR, 21 ms, authoritativenoyes / yesrefused-
dns2.kulnet.kuleuven.be 134.58.126.6NOERROR, 20 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 2026100500 · primary dns2.kulnet.kuleuven.be

Found

Primary (MNAME)
dns2.kulnet.kuleuven.be
Contact (RNAME)
postmaster.kulnet.kuleuven.be
Serial
2026100500
Refresh / retry
10800 s / 1800 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
dns1.kulnet.kuleuven.be (134.58.126.5)2026100500
dns1.kulnet.kuleuven.be (2a02:2c40:0:40::53:5)2026100500
dns2.kulnet.kuleuven.be (134.58.126.6)2026100500
dns2.kulnet.kuleuven.be (2a02:2c40:0:40::53:6)2026100500

Checks

  • ✓ Serial 2026100500 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 30m, expire 7d, 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.be #25
    The SOA RNAME postmaster.kulnet.kuleuven.be means postmaster@kulnet.kuleuven.be.
  • ✓ Date-based serial #26
    The serial 2026100500 follows the YYYYMMDDnn convention (2026-10-05).

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

pass

30 records at the apex

Found

Read from
134.58.126.5:53
TypeValueTTL
SOAdns2.kulnet.kuleuven.be. postmaster.kulnet.kuleuven.be. 2026100500 10800 1800 604800 8640086400
NSdns2.kulnet.kuleuven.be.86400
NSdns1.kulnet.kuleuven.be.86400
A134.58.64.16286400
AAAA2a02:2c40:0:80::80:a4600
MX30 cavin03.kuleuven.be.86400
MX20 limbak.cc.kuleuven.be.86400
MX30 cavin01.kuleuven.be.86400
MX20 kromsin.cc.kuleuven.be.86400
MX10 cavin.kuleuven.be.86400
MX30 cavin02.kuleuven.be.86400
TXT"wim=1"300
TXT"af6GPUS75x/c2w2wQVa2ZpUPwVNjRUn6TP0j2S2PbMHQgoq6QO4CJAooKUs0OF58/1exvR64eZUTq8rEfq9uJw=="86400
TXT"google-site-verification=uo1UJBLxNGSyP8e-_FegmG6rHTfkzmg93sbqLY8xvNg"600
TXT"google-site-verification=SGGwxxsT7lvxUZyXNYY2VVwe2uhYfpSlmblKTAQfRyw"86400
TXT"spf2.0/pra include:_spf.kuleuven.be -all"60
TXT"jetbrains-domain-verification=q7n3msub5lwwihr3gz276igi"86400
TXT"docusign=af6727a7-89da-432b-93f3-8f382fa51914"86400
TXT"docusign=c7f4684a-d588-4d62-a1ea-04ae05102c2b"86400
TXT"google-site-verification=CAbH28xIl30qPcVDpm_7kborgiYb1k2LKXwV8gJ3nuA"600
TXT"linear-domain-verification=2y5757t3etwj"86400
TXT"apple-domain-verification=vplHa7Trg4h7Su5j"3600
TXT"IwRLkSQWxjEqA3WNM0EYB+rvlxVfrDPt4yiASgi62nTZRkHIVRdHXvtzgSAZyqHLQAAEUER1yfS1QKX02XKc1w=="86400
TXT"OSSRH-48090"86400
TXT"jamf-site-verification=uojHPtKnAx48ugOkIglJgQ"86400
TXT"atlassian-domain-verification=5lXcH18NiCI3YKWFyQACIXR85MZ8bgSLp1t9R38aDkjJtQqu8Vel1mtVdDxbGlv2"86400
TXT"v=spf1 include:_spf.kuleuven.be -all"60
CAA0 iodef "mailto:abuse@kuleuven.be"3600
CAA0 issue "harica.gr"3600
CAA0 issue "letsencrypt.org"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1d, AAAA 10m, MX 1d, NS 1d.
  • ✓ 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: harica.gr, letsencrypt.org.