bonn.de

Checked 21 October 2026, 21:50 UTC · via 8.8.8.8
!Passed with warnings
23 passed 1 warning 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

dns-1.bonn.de, ns2.tops.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns-1.bonn.de, ns2.tops.net
NS in the zone
dns-1.bonn.de, ns2.tops.net
NameserverAddressesNetwork (AS)Glue
dns-1.bonn.de91.213.177.7AS12581 TOPSNET - tops.net GmbH & Co. KG, DE91.213.177.7
ns2.tops.net5.9.85.53 2a01:4f8:162:465::2AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns-1.bonn.de, ns2.tops.net.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: dns-1.bonn.de.
  • ✓ 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 2 IPv4 /24s and 1 IPv6 /48.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS12581 (TOPSNET - tops.net GmbH & Co. KG, DE): 1 address; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 2 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: dns-1.bonn.de.
    #13

Nameservers

pass

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns-1.bonn.de 91.213.177.7NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns2.tops.net 5.9.85.53NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns2.tops.net 2a01:4f8:162:465::2NOERROR, 4 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

pass

serial 201402495 · primary dns-1.bonn.de

Found

Primary (MNAME)
dns-1.bonn.de
Contact (RNAME)
postmaster.bonn.de
Serial
201402495
Refresh / retry
86400 s / 3600 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
dns-1.bonn.de (91.213.177.7)201402495
ns2.tops.net (5.9.85.53)201402495
ns2.tops.net (2a01:4f8:162:465::2)201402495

Checks

  • ✓ Serial 201402495 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 1h, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns-1.bonn.de is one of the listed nameservers.
  • ✓ Contact postmaster@bonn.de #25
    The SOA RNAME postmaster.bonn.de means postmaster@bonn.de.
  • ✓ Counter serial #26
    The serial 201402495 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

17 records at the apex

Found

Read from
91.213.177.7:53
TypeValueTTL
SOAdns-1.bonn.de. postmaster.bonn.de. 201402495 86400 3600 604800 300300
NSns2.tops.net.300
NSdns-1.bonn.de.300
A185.85.0.138300
MX10 mailgw02.regioit.de.300
MX10 mailgw01.regioit.de.300
TXT"v=spf1 a a:bonn.de include:mail.kdvz-frechen.de ip4:91.213.177.151 ip4:91.213.177.152 ip4:91.213.177.153 ip4:91.213.177.154 ip4:91.213.177.180 ip4:194.45.37.22 ip4:195.38.20.30 -all"300
TXT"google-site-verification=eUR0YAGZJGUo6wk6uwgwHvMP6c_KUr8QkATWY4ejgUo"300
TXT"MS=ms20701962"300
TXT"MS=ms88630659"300
TXT"MS=ms77386515"300
TXT"yahoo-verification-key=d/3TsNFhiACuwq8k/KlyzFbxdbEDcwZiSaRCAUAk2DY="300
TXT"MS=ms60047536"300
TXT"apple-domain-verification=wVfIRXj3sVOz2t57"300
TXT"MS=ms92714000"300
TXT"google-gws-recovery-domain-verification=56930885"300
TXT"google-site-verification=QckA71ZQiVO4MsizdvSn8m5nK17PXjR8ljNLMpVCIvw"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, NS 5m. The NS TTL at the parent is 1d and in the zone 5m; 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