general-anzeiger-bonn.de

Checked 21 October 2026, 22:40 UTC · via 8.8.8.8
!Passed with warnings
22 passed 3 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

dns01.circit.de, dns02.circit.de, dns03.circit.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns01.circit.de, dns02.circit.de, dns03.circit.de
NS in the zone
dns01.circit.de, dns02.circit.de, dns03.circit.de
NameserverAddressesNetwork (AS)Glue
dns01.circit.de193.194.144.251AS9175 circIT - Circ IT GmbH & Co. KG, DE193.194.144.251
dns02.circit.de212.46.121.250AS12676 NCORE-AS - HKN GmbH, DE212.46.121.250
dns03.circit.de213.9.95.2AS12676 NCORE-AS - HKN GmbH, DE213.9.95.2

Checks

  • ✓ 3 nameservers #6
    Delegated to dns01.circit.de, dns02.circit.de, dns03.circit.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: AS12676 (NCORE-AS - HKN GmbH, DE): 2 addresses; AS9175 (circIT - Circ IT GmbH & Co. KG, DE): 1 address.
  • i
    All nameserver names under .de
    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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

warn

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns01.circit.de 193.194.144.251NOERROR, 8 ms, authoritativenoyes / yesrefused9.18.39-0ubuntu0.24.04.8-Ubuntu
dns02.circit.de 212.46.121.250NOERROR, 8 ms, authoritativenoyes / yesrefused9.18.39-0ubuntu0.22.04.7-Ubuntu
dns03.circit.de 213.9.95.2NOERROR, 9 ms, authoritativenoyes / yesrefused9.18.39-0ubuntu0.22.04.7-Ubuntu

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: dns01.circit.de: "9.18.39-0ubuntu0.24.04.8-Ubuntu"; dns02.circit.de: "9.18.39-0ubuntu0.22.04.7-Ubuntu"; dns03.circit.de: "9.18.39-0ubuntu0.22.04.7-Ubuntu". 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 1780919159 · primary dns01.circit.de

Found

Primary (MNAME)
dns01.circit.de
Contact (RNAME)
domains.circit.de
Serial
1780919159
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
dns01.circit.de (193.194.144.251)1780919159
dns02.circit.de (212.46.121.250)1780919159
dns03.circit.de (213.9.95.2)1780919159

Checks

  • ✓ Serial 1780919159 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns01.circit.de is one of the listed nameservers.
  • ✓ Contact domains@circit.de #25
    The SOA RNAME domains.circit.de means domains@circit.de.
  • ✓ Timestamp serial #26
    The serial 1780919159 is a Unix timestamp (2026-06-08 11:45 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

10 records at the apex

Found

Read from
193.194.144.251:53
TypeValueTTL
SOAdns01.circit.de. domains.circit.de. 1780919159 28800 7200 604800 30086400
NSdns03.circit.de.86400
NSdns02.circit.de.86400
NSdns01.circit.de.86400
A149.221.196.793600
MX100 cust13628-2.in.mailcontrol.com.3600
MX100 cust13628-1.in.mailcontrol.com.3600
TXT"google-site-verification=QV04XsZ9k882nUK5BE_RZni3z6k3IP6O--MfOnTvISU"3600
TXT"v=spf1 mx a include:spf.nl2go.com -all"3600
TXT"MS=ms91076548"3600

Checks

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