e-bookshelf.de

Checked 21 October 2026, 22:17 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

warn

ns1.dnsdienst.de, ns2.dnsdienst.de, ns3.dnsdienst.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.dnsdienst.de, ns2.dnsdienst.de, ns3.dnsdienst.de
NS in the zone
ns1.dnsdienst.de, ns2.dnsdienst.de, ns3.dnsdienst.de
NameserverAddressesNetwork (AS)Glue
ns1.dnsdienst.de194.50.187.134AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT194.50.187.134
ns2.dnsdienst.de194.0.182.1AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT194.0.182.1
ns3.dnsdienst.de193.227.117.124AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT193.227.117.124

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.dnsdienst.de, ns2.dnsdienst.de, ns3.dnsdienst.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.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS1921 (RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT): 3 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 .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

info

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.dnsdienst.de 194.50.187.134NOERROR, 11 ms, authoritativenoyes / yesrefusedreg-wie1
ns2.dnsdienst.de 194.0.182.1NOERROR, 3 ms, authoritativenoyes / yesrefusedRcodeZero DNS
ns3.dnsdienst.de 193.227.117.124NOERROR, 3 ms, authoritativenoyes / yesrefusedRcodeZero DNS

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns1.dnsdienst.de: "reg-wie1"; ns2.dnsdienst.de: "RcodeZero DNS"; ns3.dnsdienst.de: "RcodeZero DNS".
    #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

warn

serial 2026090301 · primary ns1.dnsdienst.de

Found

Primary (MNAME)
ns1.dnsdienst.de
Contact (RNAME)
secura.domainregistry.de
Serial
2026090301
Refresh / retry
86400 s / 3600 s
Expire
3600000 s
Negative TTL
172800 s

Serial per nameserver

NameserverSerial
ns1.dnsdienst.de (194.50.187.134)2026090301
ns2.dnsdienst.de (194.0.182.1)2026090301
ns3.dnsdienst.de (193.227.117.124)2026090301

Checks

  • ✓ Serial 2026090301 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 2d is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 1d, retry 1h, expire 1000h, negative TTL 2d.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.dnsdienst.de is one of the listed nameservers.
  • ✓ Contact secura@domainregistry.de #25
    The SOA RNAME secura.domainregistry.de means secura@domainregistry.de.
  • ✓ Date-based serial #26
    The serial 2026090301 follows the YYYYMMDDnn convention (2026-09-03).

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
194.50.187.134:53
TypeValueTTL
SOAns1.dnsdienst.de. secura.domainregistry.de. 2026090301 86400 3600 3600000 1728003600
NSns1.dnsdienst.de.3600
NSns2.dnsdienst.de.3600
NSns3.dnsdienst.de.3600
A109.109.200.5300
MX30 mailx.mccokg.de.300
MX50 mailin.airlineholidays.com.300
TXT"_globalsign-domain-verification=FH3SKHUom52mxj99bqbEU3bo4cAtoEWQ9PAf7CA9gn"28800
TXT"_globalsign-domain-verification=wIEw3c6atNN_pIVllPmkUfCEWjT3FSjurqeGSsSqVe"28800
TXT"84m43z3ynhzlzlmkl6lm56bl59zslht4"28800

Checks

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