nbn.be

Checked 22 October 2026, 06:51 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)
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

info

darwin.ns.cloudflare.com, uma.ns.cloudflare.com

Found

Parent zone
be
Delegation from
a.nsset.be (194.0.6.1)
NS at the parent
darwin.ns.cloudflare.com, uma.ns.cloudflare.com
NS in the zone
darwin.ns.cloudflare.com, uma.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
darwin.ns.cloudflare.com172.64.33.151 108.162.193.151 173.245.59.151 2a06:98c1:50::ac40:2197 2803:f800:50::6ca2:c197 2606:4700:58::adf5:3b97AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-
uma.ns.cloudflare.com172.64.32.146 108.162.192.146 173.245.58.146 2803:f800:50::6ca2:c092 2a06:98c1:50::ac40:2092 2606:4700:50::adf5:3a92AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: darwin.ns.cloudflare.com, uma.ns.cloudflare.com.
    #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 different networks #10
    The nameservers are spread over 6 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 12 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 .com
    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

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
darwin.ns.cloudflare.com 172.64.33.151NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 108.162.193.151NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 173.245.59.151NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 2a06:98c1:50::ac40:2197NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 2803:f800:50::6ca2:c197NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 2606:4700:58::adf5:3b97NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 172.64.32.146NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 108.162.192.146NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 173.245.58.146NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 2803:f800:50::6ca2:c092NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 2a06:98c1:50::ac40:2092NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 2606:4700:50::adf5:3a92NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2

Checks

  • ✓ All respond #14
    All 12 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: darwin.ns.cloudflare.com: "2026.10.2"; uma.ns.cloudflare.com: "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 2416792721 · primary darwin.ns.cloudflare.com

Found

Primary (MNAME)
darwin.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2416792721
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
darwin.ns.cloudflare.com (172.64.33.151)2416792721
darwin.ns.cloudflare.com (108.162.193.151)2416792721
darwin.ns.cloudflare.com (173.245.59.151)2416792721
darwin.ns.cloudflare.com (2a06:98c1:50::ac40:2197)2416792721
darwin.ns.cloudflare.com (2803:f800:50::6ca2:c197)2416792721
darwin.ns.cloudflare.com (2606:4700:58::adf5:3b97)2416792721
uma.ns.cloudflare.com (172.64.32.146)2416792721
uma.ns.cloudflare.com (108.162.192.146)2416792721
uma.ns.cloudflare.com (173.245.58.146)2416792721
uma.ns.cloudflare.com (2803:f800:50::6ca2:c092)2416792721
uma.ns.cloudflare.com (2a06:98c1:50::ac40:2092)2416792721
uma.ns.cloudflare.com (2606:4700:50::adf5:3a92)2416792721

Checks

  • ✓ Serial 2416792721 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h46m40s, retry 40m, expire 7d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver darwin.ns.cloudflare.com is one of the listed nameservers.
  • ✓ Contact dns@cloudflare.com #25
    The SOA RNAME dns.cloudflare.com means dns@cloudflare.com.
  • ✓ Timestamp serial #26
    The serial 2416792721 is a Unix timestamp (2046-08-02 03:18 UTC).

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

17 records at the apex

Found

Read from
172.64.33.151:53
TypeValueTTL
SOAdarwin.ns.cloudflare.com. dns.cloudflare.com. 2416792721 10000 2400 604800 18001800
NSdarwin.ns.cloudflare.com.86400
NSuma.ns.cloudflare.com.86400
A172.67.71.193300
A104.26.1.93300
A104.26.0.93300
AAAA2606:4700:20::681a:15d300
AAAA2606:4700:20::681a:5d300
AAAA2606:4700:20::ac43:47c1300
MX0 nbn-be.mail.protection.outlook.com.43200
TXT"_globalsign-domain-verification=WvUztE-WUqA7qjSn1UGoJ5cvGmigP6QCAYN_XeGb9t"300
TXT"facebook-domain-verification=keth6nivv61dsp9zzo04z36twwxv8w"300
TXT"google-site-verification=2pyasNOP4LvALQoDEm5THGoPpRNCj7OFDrsPRgpgCrM"300
TXT"google-site-verification=VlG3uqaIHa3JGLncDC8AXFUx6obcfUSajemLl_pZsE8"300
TXT"proxy-ssl.webflow.com"300
TXT"spf2.0/pra mx a:shop.nbn.be include:spf.protection.outlook.com include:spf.flexmail.eu include:mail.zendesk.com ip4:213.211.138.5 include:spf.ymlp.com -all"300
TXT"v=spf1 include:spf.protection.outlook.com include:spf.mailjet.com include:eu.rp.oracleemaildelivery.com include:145770934.spf01.hubspotemail.net ~all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 12h, 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.
  • 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