potsdam.de

Checked 21 October 2026, 23:51 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

ns1.variomedia.de, ns2.variomedia.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.variomedia.de, ns2.variomedia.de
NS in the zone
ns1.variomedia.de, ns2.variomedia.de
NameserverAddressesNetwork (AS)Glue
ns1.variomedia.de185.95.96.53 2a00:1c3e:96::53AS8561 KNIPPWORLDWIDE - Knipp Medien und Kommunikation GmbH, DE AS48519 KNIPP-AMS-AS - Knipp Medien und Kommunikation GmbH, DE185.95.96.53 2a00:1c3e:96::53
ns2.variomedia.de185.95.98.53 2a00:1c3e:98::53AS8561 KNIPPWORLDWIDE - Knipp Medien und Kommunikation GmbH, DE AS48519 KNIPP-AMS-AS - Knipp Medien und Kommunikation GmbH, DE185.95.98.53 2a00:1c3e:98::53

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.variomedia.de, ns2.variomedia.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 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS48519 (KNIPP-AMS-AS - Knipp Medien und Kommunikation GmbH, DE): 2 addresses; AS8561 (KNIPPWORLDWIDE - Knipp Medien und Kommunikation GmbH, DE): 2 addresses.
  • 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.variomedia.de 185.95.96.53NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns1.variomedia.de 2a00:1c3e:96::53NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns2.variomedia.de 185.95.98.53NOERROR, 18 ms, authoritativenoyes / yesrefused-
ns2.variomedia.de 2a00:1c3e:98::53NOERROR, 22 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 1791446881 · primary ns1.variomedia.de

Found

Primary (MNAME)
ns1.variomedia.de
Contact (RNAME)
support.variomedia.de
Serial
1791446881
Refresh / retry
28800 s / 7200 s
Expire
1209600 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1.variomedia.de (185.95.96.53)1791446881
ns1.variomedia.de (2a00:1c3e:96::53)1791446881
ns2.variomedia.de (185.95.98.53)1791446881
ns2.variomedia.de (2a00:1c3e:98::53)1791446881

Checks

  • ✓ Serial 1791446881 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 14d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.variomedia.de is one of the listed nameservers.
  • ✓ Contact support@variomedia.de #25
    The SOA RNAME support.variomedia.de means support@variomedia.de.
  • ✓ Timestamp serial #26
    The serial 1791446881 is a Unix timestamp (2026-10-08 08:08 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

8 records at the apex

Found

Read from
185.95.96.53:53
TypeValueTTL
SOAns1.variomedia.de. support.variomedia.de. 1791446881 28800 7200 1209600 300300
NSns2.variomedia.de.300
NSns1.variomedia.de.300
A80.86.4.131300
MX10 mail.variomedia.de.300
TXT"v=spf1 mx ip4:80.86.1.20 ip4:80.86.1.125 ip4:80.86.1.126 ip4:80.86.1.127 ip4:80.86.1.128 ip4:80.86.1.129 ip4:87.234.236.35 ip4:87.234.236.38 ip4:80.86.4.131 ip4:80.86.4.132 ip4:80.86.4.133 ip4:80.86.4.134 ip4:80.86.4.135 ip4:80.86.4.136 ip4:80.86.4.137 ip" "4:80.86.4.148 ip4:80.86.4.149 include:spf.variomedia.de -all"300
TXT"google-site-verification=UrwKEdwZcekF0AdBu2PghK5jkNGkfwtJNCUkIeq7NlI"300
TXT"_telesec-domain-validation=319338_2023-04-26_f9MNXSRyHEgBzfWDrA8aTrKDjTuKFiThzaYfVH562mGrmE26WH"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