archivportal-d.de

Checked 21 October 2026, 21:30 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 warnings 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

warn

dns1.fiz-karlsruhe.de, dns2.fiz-karlsruhe.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns1.fiz-karlsruhe.de, dns2.fiz-karlsruhe.de
NS in the zone
dns1.fiz-karlsruhe.de, dns2.fiz-karlsruhe.de
NameserverAddressesNetwork (AS)Glue
dns1.fiz-karlsruhe.de141.66.18.17AS13040 ASN-FIZ - FIZ Karlsruhe - Leibniz-Institut fuer Informationsinfrastruktur GmbH, DE141.66.18.17
dns2.fiz-karlsruhe.de141.66.19.17AS13040 ASN-FIZ - FIZ Karlsruhe - Leibniz-Institut fuer Informationsinfrastruktur GmbH, DE141.66.19.17

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns1.fiz-karlsruhe.de, dns2.fiz-karlsruhe.de.
    #6
  • ✓ 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 2 IPv4 /24s and 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13040 (ASN-FIZ - FIZ Karlsruhe - Leibniz-Institut fuer Informationsinfrastruktur GmbH, DE): 2 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

pass

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.fiz-karlsruhe.de 141.66.18.17NOERROR, 7 ms, authoritativenoyes / yesrefused-
dns2.fiz-karlsruhe.de 141.66.19.17NOERROR, 6 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 2 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 77 · primary dns1.fiz-karlsruhe.de

Found

Primary (MNAME)
dns1.fiz-karlsruhe.de
Contact (RNAME)
hostmaster.fiz-karlsruhe.de
Serial
77
Refresh / retry
10800 s / 3600 s
Expire
2332800 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
dns1.fiz-karlsruhe.de (141.66.18.17)77
dns2.fiz-karlsruhe.de (141.66.19.17)77

Checks

  • ✓ Serial 77 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 27d, negative TTL 15m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.fiz-karlsruhe.de is one of the listed nameservers.
  • ✓ Contact hostmaster@fiz-karlsruhe.de #25
    The SOA RNAME hostmaster.fiz-karlsruhe.de means hostmaster@fiz-karlsruhe.de.
  • ✓ Counter serial #26
    The serial 77 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

pass

7 records at the apex

Found

Read from
141.66.18.17:53
TypeValueTTL
SOAdns1.fiz-karlsruhe.de. hostmaster.fiz-karlsruhe.de. 77 10800 3600 2332800 90028800
NSdns1.fiz-karlsruhe.de.28800
NSdns2.fiz-karlsruhe.de.28800
A141.66.192.1928800
TXT"google-site-verification=5vxjcp4XHJqJOn-qlHDr7eEhMRtn_nmAsH02JSilYs0"28800
TXT"HARICA-DAYTwgY5gwcyA1hjZ2R"28800
CAA128 issue "harica.gr"28800

Checks

  • ✓ TTLs within range #32
    TTLs: A 8h, NS 8h. The NS TTL at the parent is 1d and in the zone 8h; 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: harica.gr.