opgroeien.be

Checked 22 October 2026, 07:00 UTC · via 8.8.8.8
✗Problems found
20 passed 3 warnings 1 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

ns.opgroeien.be, ns1.clf.proximus.be, ns2.clf.proximus.be, ns3.clf.proximus.be

Found

Parent zone
be
Delegation from
a.nsset.be (194.0.6.1)
NS at the parent
ns.opgroeien.be, ns1.clf.proximus.be, ns2.clf.proximus.be, ns3.clf.proximus.be
NS in the zone
ns.opgroeien.be, ns1.clf.proximus.be, ns2.clf.proximus.be, ns3.clf.proximus.be
NameserverAddressesNetwork (AS)Glue
ns.opgroeien.be185.195.136.5 2a0a:5e40:1::5AS200353 ASKENG - Opgroeien regie, BE AS200353 ASKENG - Opgroeien regie, BE185.195.136.5
ns1.clf.proximus.be198.41.223.107AS13335 CLOUDFLARENET - Cloudflare, Inc., US-
ns2.clf.proximus.be198.41.222.171AS13335 CLOUDFLARENET - Cloudflare, Inc., US-
ns3.clf.proximus.be162.159.11.158AS13335 CLOUDFLARENET - Cloudflare, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns.opgroeien.be, ns1.clf.proximus.be, ns2.clf.proximus.be, ns3.clf.proximus.be.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: ns.opgroeien.be (glue 185.195.136.5, zone 185.195.136.5, 2a0a:5e40:1::5). Update the glue at your registrar.
    #8
  • ✓ 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 4 IPv4 /24s and 1 IPv6 /48.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 3 addresses; AS200353 (ASKENG - Opgroeien regie, BE): 2 addresses.
  • 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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns1.clf.proximus.be, ns2.clf.proximus.be, ns3.clf.proximus.be.
    #13

Nameservers

fail

3 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.opgroeien.be 185.195.136.5no responsenono / no--
ns.opgroeien.be 2a0a:5e40:1::5no responsenono / no--
ns1.clf.proximus.be 198.41.223.107NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
ns2.clf.proximus.be 198.41.222.171NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
ns3.clf.proximus.be 162.159.11.158NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: ns.opgroeien.be (185.195.136.5): read udp 46.225.38.91:42675->185.195.136.5:53: i/o timeout; ns.opgroeien.be (2a0a:5e40:1::5): read udp [2a01:4f8:1c1c:eebf::1]:35047->[2a0a:5e40:1::5]:53: i/o timeout.
    #14
  • ✓ 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: ns1.clf.proximus.be: "2026.10.2"; ns2.clf.proximus.be: "2026.10.2"; ns3.clf.proximus.be: "2026.10.2". 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 354 · primary ns.opgroeien.be

Found

Primary (MNAME)
ns.opgroeien.be
Contact (RNAME)
postmaster.kindengezin.be
Serial
354
Refresh / retry
3600 s / 600 s
Expire
1209600 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1.clf.proximus.be (198.41.223.107)354
ns2.clf.proximus.be (198.41.222.171)354
ns3.clf.proximus.be (162.159.11.158)354

Checks

  • ✓ Serial 354 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 10m, expire 14d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.opgroeien.be is one of the listed nameservers.
  • ✓ Contact postmaster@kindengezin.be #25
    The SOA RNAME postmaster.kindengezin.be means postmaster@kindengezin.be.
  • ✓ Counter serial #26
    The serial 354 is a plain counter.

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

16 records at the apex

Found

Read from
198.41.223.107:53
TypeValueTTL
SOAns.opgroeien.be. postmaster.kindengezin.be. 354 3600 600 1209600 300300
NSns.opgroeien.be.300
NSns1.clf.proximus.be.300
NSns2.clf.proximus.be.300
NSns3.clf.proximus.be.300
A185.195.136.14300
AAAA2a0a:5e40:1::d300
MX10 opgroeien-be.mail.protection.outlook.com.300
TXT"MS=ms12089771"300
TXT"_globalsign-domain-verification=4k68kZzimR6X8-eMU1Q_Ol7AXP5guh3F5T8YUfGAO8"300
TXT"google-site-verification=HtC0oUzUOhGTnkoXia64m5IZT4Vor4UbBOS3cGAtbfM"300
TXT"have-i-been-pwned-verification=a97b66a055d326f7ffaeec8dccfdbf6f"300
TXT"hibp-verify=dweb_1izpbwyugdjjn2s4j9retylt"300
TXT"hpe-greenlake-domain-verification=69463372516150697a4e65657566546f414478657a37334f77326b6978476a70"300
TXT"spf2.0/pra include:spf.flexmail.eu ?all"300
TXT"v=spf1 ip4:195.13.7.0/27 ip4:85.91.166.0/27 ip4:168.63.18.0/32 ip4:185.195.136.5/32 ip4:81.244.255.48/28 ip4:81.244.250.0/24 ip4:81.245.0.4 ip4:188.93.157.184/32 ip4:185.61.72.0/24 ip4:81.245.0.5 " "include:spf.protection.outlook.com include:servers.mcsv.net include:spf.fediap.be include:spf.secure-mail.be include:spf.flexmail.eu include:mail.zendesk.com include:email.bergop.net include:_spf.salesforce.com -all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 5m, NS 5m. The NS TTL at the parent is 1d and in the zone 5m; 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