uksh.de

Checked 22 October 2026, 00:50 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

ns1.uksh.de, ns1ki.uksh.de, ns2.uksh.de, ns2ki.uksh.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.uksh.de, ns1ki.uksh.de, ns2.uksh.de, ns2ki.uksh.de
NS in the zone
ns1.uksh.de, ns1ki.uksh.de, ns2.uksh.de, ns2ki.uksh.de
NameserverAddressesNetwork (AS)Glue
ns1.uksh.de193.175.223.101AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE193.175.223.101
ns1ki.uksh.de194.94.190.170AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE194.94.190.170
ns2.uksh.de193.175.223.102AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE193.175.223.102
ns2ki.uksh.de194.94.190.171AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE194.94.190.171

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1.uksh.de, ns1ki.uksh.de, ns2.uksh.de, ns2ki.uksh.de.
  • ✓ 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: ns1.uksh.de, ns1ki.uksh.de, ns2.uksh.de, ns2ki.uksh.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 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS680 (DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE): 4 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

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.uksh.de 193.175.223.101NOERROR, 25 ms, authoritativenoyes / yesrefused-
ns1ki.uksh.de 194.94.190.170NOERROR, 20 ms, authoritativenoyes / yesrefused-
ns2.uksh.de 193.175.223.102NOERROR, 20 ms, authoritativenoyes / yesrefused-
ns2ki.uksh.de 194.94.190.171NOERROR, 17 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 4 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 2022041447 · primary ns1.uksh.de

Found

Primary (MNAME)
ns1.uksh.de
Contact (RNAME)
netzwerk.uksh.de
Serial
2022041447
Refresh / retry
10800 s / 1080 s
Expire
2419200 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
ns1.uksh.de (193.175.223.101)2022041447
ns1ki.uksh.de (194.94.190.170)2022041447
ns2.uksh.de (193.175.223.102)2022041447
ns2ki.uksh.de (194.94.190.171)2022041447

Checks

  • ✓ Serial 2022041447 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 18m, expire 28d, negative TTL 15m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.uksh.de is one of the listed nameservers.
  • ✓ Contact netzwerk@uksh.de #25
    The SOA RNAME netzwerk.uksh.de means netzwerk@uksh.de.
  • ✓ Date-based serial #26
    The serial 2022041447 follows the YYYYMMDDnn convention (2022-04-14).

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

22 records at the apex

Found

Read from
193.175.223.101:53
TypeValueTTL
SOAns1.uksh.de. netzwerk.uksh.de. 2022041447 10800 1080 2419200 90043200
NSns2ki.uksh.de.43200
NSns2.uksh.de.43200
NSns1ki.uksh.de.43200
NSns1.uksh.de.43200
A193.175.223.81172800
MX10 mgateb.uksh.de.14400
MX10 mgatea.uksh.de.14400
MX20 mgate4.uksh.de.14400
MX20 mgate3.uksh.de.14400
TXT"google-site-verification=lHJo8wFogonBd1klu6ZWt8esbX7bWfuk6dx_dN2A5Bk"43200
TXT"ZOOM_verify_K7duZOqfgKRYNxqkZNZhZB"43200
TXT"apple-domain-verification=ndCsk5Sgdcc3Woir"43200
TXT"cisco-ci-domain-verification=337df6c3829a55c15b17937fc4d200c5ca8e96ad551bd6cc668205c74f87224e"43200
TXT"facebook-domain-verification=i51eoaa3huj3y4wtqrajt1dprvzkuh"43200
TXT"google-site-verification=DBLNYlpmNyRJX-YR6lHvQhSb678OK63ZqGPU6c0lhxw"43200
TXT"google-site-verification=JX4w9mnvCuiBaVZ9WjTEbb--JCdsaHAt-wVH8afbsak"43200
TXT"google-site-verification=1iRP0dlzZN2VpON6WA29CHwGG5R3MVoreH0Mds5EOZQ"43200
TXT"google-gws-recovery-domain-verification=51011473"43200
TXT"v=spf1 ip4:193.175.223.0/24 ip4:193.175.231.0/24 ip4:85.13.134.11 mx include:spfa.myconvento.com include:riskonnectclearsight.eu include:_spfeu.qmarkets-dns.org -all"43200
TXT"ca-attacksim=7b451719-a914-4000-820d-736fa5cea7a0"43200
TXT"HARICA-8UxsS9ifSoAhtl1zkwH"43200

Checks

  • ✓ TTLs within range #32
    TTLs: A 2d, MX 4h, NS 12h. The NS TTL at the parent is 1d and in the zone 12h; 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