nabu.de

Checked 21 October 2026, 23:31 UTC · via 8.8.8.8
!Passed with warnings
19 passed 3 warnings 0 failed 7 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

jasper.ns.cloudflare.com, jocelyn.ns.cloudflare.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
jasper.ns.cloudflare.com, jocelyn.ns.cloudflare.com
NS in the zone
jasper.ns.cloudflare.com, jocelyn.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
jasper.ns.cloudflare.com172.64.35.182 162.159.44.182 108.162.195.182 2803:f800:50::6ca2:c3b6 2a06:98c1:50::ac40:23b6 2606:4700:58::a29f:2cb6AS13335 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-
jocelyn.ns.cloudflare.com108.162.192.174 173.245.58.174 172.64.32.174 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-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: jasper.ns.cloudflare.com, jocelyn.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
jasper.ns.cloudflare.com 172.64.35.182NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
jasper.ns.cloudflare.com 162.159.44.182NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
jasper.ns.cloudflare.com 108.162.195.182NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
jasper.ns.cloudflare.com 2803:f800:50::6ca2:c3b6NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
jasper.ns.cloudflare.com 2a06:98c1:50::ac40:23b6NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
jasper.ns.cloudflare.com 2606:4700:58::a29f:2cb6NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
jocelyn.ns.cloudflare.com 108.162.192.174NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
jocelyn.ns.cloudflare.com 173.245.58.174NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
jocelyn.ns.cloudflare.com 172.64.32.174NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
jocelyn.ns.cloudflare.com 2803:f800:50::6ca2:c0aeNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
jocelyn.ns.cloudflare.com 2606:4700:50::adf5:3aaeNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
jocelyn.ns.cloudflare.com 2a06:98c1:50::ac40:20aeNOERROR, 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: jasper.ns.cloudflare.com: "2026.10.2"; jocelyn.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 2418090566 · primary jasper.ns.cloudflare.com

Found

Primary (MNAME)
jasper.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2418090566
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
jasper.ns.cloudflare.com (172.64.35.182)2418090566
jasper.ns.cloudflare.com (162.159.44.182)2418090566
jasper.ns.cloudflare.com (108.162.195.182)2418090566
jasper.ns.cloudflare.com (2803:f800:50::6ca2:c3b6)2418090566
jasper.ns.cloudflare.com (2a06:98c1:50::ac40:23b6)2418090566
jasper.ns.cloudflare.com (2606:4700:58::a29f:2cb6)2418090566
jocelyn.ns.cloudflare.com (108.162.192.174)2418090566
jocelyn.ns.cloudflare.com (173.245.58.174)2418090566
jocelyn.ns.cloudflare.com (172.64.32.174)2418090566
jocelyn.ns.cloudflare.com (2803:f800:50::6ca2:c0ae)2418090566
jocelyn.ns.cloudflare.com (2606:4700:50::adf5:3aae)2418090566
jocelyn.ns.cloudflare.com (2a06:98c1:50::ac40:20ae)2418090566

Checks

  • ✓ Serial 2418090566 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 jasper.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 2418090566 is a Unix timestamp (2046-08-17 03:49 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

warn

18 records at the apex

Found

Read from
172.64.35.182:53
TypeValueTTL
SOAjasper.ns.cloudflare.com. dns.cloudflare.com. 2418090566 10000 2400 604800 18001800
NSjasper.ns.cloudflare.com.86400
NSjocelyn.ns.cloudflare.com.86400
A89.146.224.22260
MX1 nabu-de.mail.eo.outlook.com.60
TXT"202207262108132qyyv2vd8psyh3nj6krog8n5ys9ihon2bs1157nxsz02ru9ccz"60
TXT"MS=5F423E3941B0E28882C838CD3315F993C490BC13"60
TXT"_1ha75gqp4r0a7k9lrpmdlllvmox3h3n"60
TXT"_5x4403verc3c4lyh83u80dzcvfnbc7z"60
TXT"_jf29ndlayzsd7w70asmuqp1ezlgzdqd"60
TXT"apple-domain-verification=l4vOAhY1POaU74Aa"60
TXT"brevo-code:6693f5b31d964af8b5d99edcdf44b53f"60
TXT"google-site-verification=JOTmmb19bmb4nq9I9DZ_Kw1BgHJvJ4iKoFKYLFL1gjY"60
TXT"google-site-verification=ReTlw8T3Fg-LjmNm69d2A8G7qalL99QfSA-Aj4YsdpQ"60
TXT"google-site-verification=gK_OBbAo3-cYslNs_NkASgesJ2-CknWzRIY54eQIdTw"60
TXT"google-site-verification=kR7aelmXBXKda9ov3BB1-fCpFKCRwHnTiCW2ywqMPUY"60
TXT"nordpass-domain-verification=209a5109d266f3bda7ace731d5d4d254ddcbdbb2c367d432bc1acc76a9c5a221"60
TXT"v=spf1 ip4:109.69.68.140 include:spf.nabu.de include:spf.iag.eu include:exchange.nabu.de include:spf.crsend.com include:spf.flowmailer.net include:spf.init.de include:spf.protection.outlook.com ~all"60

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), MX (1m). Low TTLs are useful just before a planned change.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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