privatelink.de

Checked 21 October 2026, 23:51 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 warnings 0 failed 5 info

Registration

info

.de country-code

Found

TLD
.de (country-code)
ICANN policies apply
no

Checks

  • i
    .de 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
    .de is delegated in the root zone and DNSSEC-signed.
  • i
    Registration data not available
    No registration data via RDAP: the registry of .de offers no RDAP service. Many ccTLD registries don't offer RDAP; check the registry's WHOIS instead.
    #3

Delegation

info

ns1.digitalocean.com, ns2.digitalocean.com, ns3.digitalocean.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.digitalocean.com, ns2.digitalocean.com, ns3.digitalocean.com
NS in the zone
ns1.digitalocean.com, ns2.digitalocean.com, ns3.digitalocean.com
NameserverAddressesNetwork (AS)Glue
ns1.digitalocean.com172.64.52.210 2606:4700:52::ac40:34d2AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-
ns2.digitalocean.com172.64.53.21 2606:4700:5a::ac40:3515AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-
ns3.digitalocean.com172.64.49.209 2606:4700:52::ac40:31d1AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.digitalocean.com, ns2.digitalocean.com, ns3.digitalocean.com.
  • ✓ 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 3 IPv4 /24s and 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 6 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

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.digitalocean.com 172.64.52.210NOERROR, 62 ms, authoritativenoyes / yesrefused2026.10.8
ns1.digitalocean.com 2606:4700:52::ac40:34d2NOERROR, 62 ms, authoritativenoyes / yesrefused2026.10.8
ns2.digitalocean.com 172.64.53.21NOERROR, 62 ms, authoritativenoyes / yesrefused2026.10.8
ns2.digitalocean.com 2606:4700:5a::ac40:3515NOERROR, 61 ms, authoritativenoyes / yesrefused2026.10.8
ns3.digitalocean.com 172.64.49.209NOERROR, 28 ms, authoritativenoyes / yesrefused2026.10.8
ns3.digitalocean.com 2606:4700:52::ac40:31d1NOERROR, 62 ms, authoritativenoyes / yesrefused2026.10.8

Checks

  • ✓ All respond #14
    All 6 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: ns1.digitalocean.com: "2026.10.8"; ns2.digitalocean.com: "2026.10.8"; ns3.digitalocean.com: "2026.10.8". 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 0 · primary ns1.digitalocean.com

Found

Primary (MNAME)
ns1.digitalocean.com
Contact (RNAME)
hostmaster.privatelink.de
Serial
0
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
ns1.digitalocean.com (172.64.52.210)0
ns1.digitalocean.com (2606:4700:52::ac40:34d2)0
ns2.digitalocean.com (172.64.53.21)0
ns2.digitalocean.com (2606:4700:5a::ac40:3515)0
ns3.digitalocean.com (172.64.49.209)0
ns3.digitalocean.com (2606:4700:52::ac40:31d1)0

Checks

  • ✓ Serial 0 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.digitalocean.com is one of the listed nameservers.
  • ✓ Contact hostmaster@privatelink.de #25
    The SOA RNAME hostmaster.privatelink.de means hostmaster@privatelink.de.
  • ✓ Counter serial #26
    The serial 0 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

6 records at the apex

Found

Read from
172.64.52.210:53
TypeValueTTL
SOAns1.digitalocean.com. hostmaster.privatelink.de. 0 10800 3600 604800 18001800
NSns2.digitalocean.com.1800
NSns1.digitalocean.com.1800
NSns3.digitalocean.com.1800
A159.69.100.791800
MX200 mail.turboad.de.1800

Checks

  • ✓ TTLs within range #32
    TTLs: A 30m, MX 30m, NS 30m. The NS TTL at the parent is 1d and in the zone 30m; 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