bbraun.de

Checked 21 October 2026, 21:36 UTC · via 8.8.8.8
!Passed with warnings
25 passed 1 warning 0 failed 3 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

pass

ns17.knipp.net, ns2.knipp.de, ns3.knipp.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns17.knipp.net, ns2.knipp.de, ns3.knipp.de
NS in the zone
ns17.knipp.net, ns2.knipp.de, ns3.knipp.de
NameserverAddressesNetwork (AS)Glue
ns17.knipp.net195.253.51.61 2a01:5b0:2:56::3dAS48519 KNIPP-AMS-AS - Knipp Medien und Kommunikation GmbH, DE AS48519 KNIPP-AMS-AS - Knipp Medien und Kommunikation GmbH, DE-
ns2.knipp.de195.253.6.52 2a01:5b0:0:29::34AS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE AS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE-
ns3.knipp.de195.253.113.3 2a01:5b0:31::3AS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE AS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns17.knipp.net, ns2.knipp.de, ns3.knipp.de.
  • ✓ 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 3 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS48519 (KNIPP-AMS-AS - Knipp Medien und Kommunikation GmbH, DE): 2 addresses; AS8391 (KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE): 4 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns17.knipp.net 195.253.51.61NOERROR, 35 ms, authoritativenoyes / yesrefused-
ns17.knipp.net 2a01:5b0:2:56::3dNOERROR, 13 ms, authoritativenoyes / yesrefused-
ns2.knipp.de 195.253.6.52NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns2.knipp.de 2a01:5b0:0:29::34NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns3.knipp.de 195.253.113.3NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns3.knipp.de 2a01:5b0:31::3NOERROR, 10 ms, authoritativenoyes / yesrefused-

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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 2024040485 · primary ns2.knipp.de

Found

Primary (MNAME)
ns2.knipp.de
Contact (RNAME)
dnsmaster.irondns.net
Serial
2024040485
Refresh / retry
10800 s / 3000 s
Expire
2419200 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
ns17.knipp.net (195.253.51.61)2024040485
ns17.knipp.net (2a01:5b0:2:56::3d)2024040485
ns2.knipp.de (195.253.6.52)2024040485
ns2.knipp.de (2a01:5b0:0:29::34)2024040485
ns3.knipp.de (195.253.113.3)2024040485
ns3.knipp.de (2a01:5b0:31::3)2024040485

Checks

  • ✓ Serial 2024040485 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 50m, expire 28d, negative TTL 15m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns2.knipp.de is one of the listed nameservers.
  • ✓ Contact dnsmaster@irondns.net #25
    The SOA RNAME dnsmaster.irondns.net means dnsmaster@irondns.net.
  • ✓ Date-based serial #26
    The serial 2024040485 follows the YYYYMMDDnn convention (2024-04-04).

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

11 records at the apex

Found

Read from
195.253.51.61:53
TypeValueTTL
SOAns2.knipp.de. dnsmaster.irondns.net. 2024040485 10800 3000 2419200 90086400
NSns2.knipp.de.86400
NSns17.knipp.net.86400
NSns3.knipp.de.86400
A195.253.6.1263600
TXT"MS=ms64592708"600
TXT"lhslwvcx1l0cbdzw7dbq1y8srthtjsm2"600
TXT"v=spf1 -all"600
TXT"facebook-domain-verification=ux0laf1qrk8tm0fhjfpblwp7casf56"600
TXT"knowbe4-site-verification=f88aa109d4f3d08f4e5efdaf31dabc3c"600
TXT"google-site-verification=4K72QUNl-9HQnSOLE0sT2mZ7lpXyFL864pJQGotbWKI"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, 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