ufsia.ac.be

Checked 22 October 2026, 07:20 UTC · via 8.8.8.8
!Passed with warnings
20 passed 3 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

dnsext1.uantwerpen.be, dnsext2.uantwerpen.be

Found

Parent zone
ac.be
Delegation from
ns1.belnet.be (193.190.198.14)
NS at the parent
dnsext1.uantwerpen.be, dnsext2.uantwerpen.be
NS in the zone
dnsext1.uantwerpen.be, dnsext2.uantwerpen.be
NameserverAddressesNetwork (AS)Glue
dnsext1.uantwerpen.be143.169.252.11AS2611 BELNET - BELNET, BE-
dnsext2.uantwerpen.be143.169.252.12AS2611 BELNET - BELNET, BE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dnsext1.uantwerpen.be, dnsext2.uantwerpen.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 143.169.252.0/24. 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): 2 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

pass

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dnsext1.uantwerpen.be 143.169.252.11NOERROR, 14 ms, authoritativenoyes / yesrefused-
dnsext2.uantwerpen.be 143.169.252.12NOERROR, 14 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 2 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 2011101839 · primary dnsext1.uantwerpen.be

Found

Primary (MNAME)
dnsext1.uantwerpen.be
Contact (RNAME)
dnsmaster.uantwerpen.be
Serial
2011101839
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
dnsext1.uantwerpen.be (143.169.252.11)2011101839
dnsext2.uantwerpen.be (143.169.252.12)2011101839

Checks

  • ✓ Serial 2011101839 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dnsext1.uantwerpen.be is one of the listed nameservers.
  • ✓ Contact dnsmaster@uantwerpen.be #25
    The SOA RNAME dnsmaster.uantwerpen.be means dnsmaster@uantwerpen.be.
  • ✓ Date-based serial #26
    The serial 2011101839 follows the YYYYMMDDnn convention (2011-10-18).

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

4 records at the apex

Found

Read from
143.169.252.11:53
TypeValueTTL
SOAdnsext1.uantwerpen.be. dnsmaster.uantwerpen.be. 2011101839 10800 3600 604800 360010800
NSdnsext1.uantwerpen.be.10800
NSdnsext2.uantwerpen.be.10800
TXT"v=spf1 ip4:143.169.0.0/16 ip4:143.129.0.0/16 ip4:146.175.0.0/16 ~all"10800

Checks

  • ✓ TTLs within range #32
    TTLs: NS 3h. The NS TTL at the parent is 1h and in the zone 3h; 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