bvr.de

Checked 21 October 2026, 22:04 UTC · via 8.8.8.8
!Passed with warnings
23 passed 2 warnings 0 failed 4 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

warn

ns1.as31521.de, ns2.as31521.net, ns3.as31521.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.as31521.de, ns2.as31521.net, ns3.as31521.de
NS in the zone
ns1.as31521.de, ns2.as31521.net, ns3.as31521.de
NameserverAddressesNetwork (AS)Glue
ns1.as31521.de83.137.168.250AS31521 DOM-AS - DOM Digital Online Media GmbH, DE83.137.168.250
ns2.as31521.net195.138.35.78AS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE-
ns3.as31521.de83.137.170.250AS31521 DOM-AS - DOM Digital Online Media GmbH, DE83.137.170.250

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.as31521.de, ns2.as31521.net, ns3.as31521.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 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS31521 (DOM-AS - DOM Digital Online Media GmbH, DE): 2 addresses; AS8391 (KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE): 1 address.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

pass

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.as31521.de 83.137.168.250NOERROR, 7 ms, authoritativenoyes / yesrefused-
ns2.as31521.net 195.138.35.78NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns3.as31521.de 83.137.170.250NOERROR, 7 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 3 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

info

serial 2026101505 · primary koelner.dom.de

Found

Primary (MNAME)
koelner.dom.de
Contact (RNAME)
hostmaster.dom.de
Serial
2026101505
Refresh / retry
43200 s / 5400 s
Expire
3600000 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.as31521.de (83.137.168.250)2026101505
ns2.as31521.net (195.138.35.78)2026101505
ns3.as31521.de (83.137.170.250)2026101505

Checks

  • ✓ Serial 2026101505 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 90m, expire 1000h, negative TTL 1d.
  • i
    Hidden master
    The primary nameserver koelner.dom.de is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact hostmaster@dom.de #25
    The SOA RNAME hostmaster.dom.de means hostmaster@dom.de.
  • ✓ Date-based serial #26
    The serial 2026101505 follows the YYYYMMDDnn convention (2026-10-15).

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

12 records at the apex

Found

Read from
83.137.168.250:53
TypeValueTTL
SOAkoelner.dom.de. hostmaster.dom.de. 2026101505 43200 5400 3600000 86400172800
NSns3.as31521.de.172800
NSns2.as31521.net.172800
NSns1.as31521.de.172800
A80.155.38.12186400
MX10 smtp2.bvr.de.3600
MX50 smtp3.bvr.de.3600
MX100 mailgw.dom.de.3600
TXT"d365mktkey=gcThPsoijmfmAMPTDWBow9b6iQcF26AuqbIAHcBZHRAx"3600
TXT"v=spf1 mx a:smtp4.bvr.de a:smtp5.bvr.de ip4:87.128.169.34 ip4:80.155.38.99 include:spf.protection.outlook.com -all"900
TXT"d365mktkey=F8tDtZeEs3gZewKP5RBT3SxxdbMfKixYN0tayA1W3EQx"3600
TXT"MS=ms15984533"900

Checks

  • ✓ TTLs within range #32
    TTLs: A 1d, MX 1h, NS 2d. The NS TTL at the parent is 1d and in the zone 2d; 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