opendoors.nl

Checked 22 October 2026, 15:02 UTC · via 8.8.8.8
!Passed with warnings
21 passed 2 warnings 0 failed 6 info

Registration

info

.nl country-code

Found

TLD
.nl (country-code)
ICANN policies apply
no
Lookup error: https://rdap.sidn.nl/domain/opendoors.nl returned HTTP 429

Checks

  • i
    .nl 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
    .nl is delegated in the root zone and DNSSEC-signed.
  • i
    Could not be checked
    The RDAP lookup failed, so this could not be checked: https://rdap.sidn.nl/domain/opendoors.nl returned HTTP 429
    #3

Delegation

info

jocelyn.ns.cloudflare.com, terry.ns.cloudflare.com

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
jocelyn.ns.cloudflare.com, terry.ns.cloudflare.com
NS in the zone
jocelyn.ns.cloudflare.com, terry.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
jocelyn.ns.cloudflare.com173.245.58.174 172.64.32.174 108.162.192.174 2803:f800:50::6ca2:c0ae 2606:4700:50::adf5:3aae 2a06:98c1:50::ac40:20aeAS13335 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-
terry.ns.cloudflare.com172.64.33.237 108.162.193.237 173.245.59.237 2606:4700:58::adf5:3bed 2803:f800:50::6ca2:c1ed 2a06:98c1:50::ac40:21edAS13335 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: jocelyn.ns.cloudflare.com, terry.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
jocelyn.ns.cloudflare.com 173.245.58.174NOERROR, 19 ms, authoritativenoyes / yesrefused2026.10.2
jocelyn.ns.cloudflare.com 172.64.32.174NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
jocelyn.ns.cloudflare.com 108.162.192.174NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
jocelyn.ns.cloudflare.com 2803:f800:50::6ca2:c0aeNOERROR, 28 ms, authoritativenoyes / yesrefused2026.10.2
jocelyn.ns.cloudflare.com 2606:4700:50::adf5:3aaeNOERROR, 23 ms, authoritativenoyes / yesrefused2026.10.2
jocelyn.ns.cloudflare.com 2a06:98c1:50::ac40:20aeNOERROR, 24 ms, authoritativenoyes / yesrefused2026.10.2
terry.ns.cloudflare.com 172.64.33.237NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
terry.ns.cloudflare.com 108.162.193.237NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
terry.ns.cloudflare.com 173.245.59.237NOERROR, 18 ms, authoritativenoyes / yesrefused2026.10.2
terry.ns.cloudflare.com 2606:4700:58::adf5:3bedNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
terry.ns.cloudflare.com 2803:f800:50::6ca2:c1edNOERROR, 21 ms, authoritativenoyes / yesrefused2026.10.2
terry.ns.cloudflare.com 2a06:98c1:50::ac40:21edNOERROR, 17 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: jocelyn.ns.cloudflare.com: "2026.10.2"; terry.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 2417985060 · primary jocelyn.ns.cloudflare.com

Found

Primary (MNAME)
jocelyn.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417985060
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
jocelyn.ns.cloudflare.com (173.245.58.174)2417985060
jocelyn.ns.cloudflare.com (172.64.32.174)2417985060
jocelyn.ns.cloudflare.com (108.162.192.174)2417985060
jocelyn.ns.cloudflare.com (2803:f800:50::6ca2:c0ae)2417985060
jocelyn.ns.cloudflare.com (2606:4700:50::adf5:3aae)2417985060
jocelyn.ns.cloudflare.com (2a06:98c1:50::ac40:20ae)2417985060
terry.ns.cloudflare.com (172.64.33.237)2417985060
terry.ns.cloudflare.com (108.162.193.237)2417985060
terry.ns.cloudflare.com (173.245.59.237)2417985060
terry.ns.cloudflare.com (2606:4700:58::adf5:3bed)2417985060
terry.ns.cloudflare.com (2803:f800:50::6ca2:c1ed)2417985060
terry.ns.cloudflare.com (2a06:98c1:50::ac40:21ed)2417985060

Checks

  • ✓ Serial 2417985060 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 jocelyn.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 2417985060 is a Unix timestamp (2046-08-15 22:31 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

15 records at the apex

Found

Read from
173.245.58.174:53
TypeValueTTL
SOAjocelyn.ns.cloudflare.com. dns.cloudflare.com. 2417985060 10000 2400 604800 18001800
NSjocelyn.ns.cloudflare.com.86400
NSterry.ns.cloudflare.com.86400
A188.114.96.2300
A188.114.97.2300
AAAA2a06:98c1:3120::2300
AAAA2a06:98c1:3121::2300
MX0 opendoors-nl.mail.protection.outlook.com.300
TXT"MS=ms45435966"300
TXT"SFMC-hy1t7JAkpsJfWV_ENuUlISicvraZpdEOfwuXH3JJ"300
TXT"apple-domain-verification=4HDWeV09PCIuTXP5"300
TXT"brevo-code:b3541c5bd2ff158ba01091d0ff882202"300
TXT"google-site-verification=qDcOSLlwddBqLH6d3l2d3Zzm1YaI3gpjdDH-Ghw-D50"300
TXT"sophos-domain-verification=698e3e74f3f53c36a0f4497ec73830e5caf0149646050a3762c7c07e4e424996"300
TXT"v=spf1 mx include:spf.afas.online include:spf.protection.outlook.com include:_spf.salesforce.com ~all"300

Checks

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