charite.de

.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

b.ns14.net, dns-3.dfn.de, dns-ext-cbf.charite.de, dns-ext-cvk.charite.de

Found

Parent zone

de

Delegation from

a.nic.de (194.0.0.53)

NS at the parent

b.ns14.net, dns-3.dfn.de, dns-ext-cbf.charite.de, dns-ext-cvk.charite.de

NS in the zone

b.ns14.net, dns-3.dfn.de, dns-ext-cbf.charite.de, dns-ext-cvk.charite.de

Checks

• ✓ 4 nameservers #6

  Delegated to b.ns14.net, dns-3.dfn.de, dns-ext-cbf.charite.de, dns-ext-cvk.charite.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: dns-ext-cbf.charite.de, dns-ext-cvk.charite.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 4 IPv4 /24s and 2 IPv6 /48s.
• ✓ 2 autonomous systems #11

  The nameservers are spread over: AS680 (DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE): 4 addresses; AS8560 (IONOS-AS - IONOS SE, 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-ext-cbf.charite.de, dns-ext-cvk.charite.de.

  #13

6 of 6 addresses answer authoritatively

Found

Checks

• ✓ All respond #14

  All 6 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: b.ns14.net: "Served by PowerDNS - https://www.powerdns.com/"; dns-3.dfn.de: "0".

  #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.

26 records at the apex

Found

Read from

217.160.81.160:53

Checks

• ✓ TTLs within range #32

  TTLs: A 12h, MX 12h, 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.
• 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
• ✓ CAA restricts issuance #35

  Certificates may be issued by: amazon.com, amazonaws.com, godaddy.com, amazontrust.com, letsencrypt.org, harica.gr, awstrust.com.