Domain report: luther.de

Registration

info

.de country-code

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.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.
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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

info

ns2.knipp.de, ns3.knipp.de

Nameserver	Addresses	Network (AS)	Glue
ns2.knipp.de	195.253.6.52 2a01:5b0:0:29::34	AS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE AS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE	-
ns3.knipp.de	195.253.113.3 2a01:5b0:31::3	AS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE AS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE	-

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2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns2.knipp.de, ns3.knipp.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.
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All nameservers in one AS

All nameserver addresses are announced by one network operator (AS8391 (KNIPP-AS - Knipp Medien und Kommunikation GmbH, 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
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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.

pass

4 of 4 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns2.knipp.de 195.253.6.52	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
ns2.knipp.de 2a01:5b0:0:29::34	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
ns3.knipp.de 195.253.113.3	NOERROR, 9 ms, authoritative	no	yes / yes	refused	-
ns3.knipp.de 2a01:5b0:31::3	NOERROR, 10 ms, authoritative	no	yes / yes	refused	-

✓ 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.

pass

serial 2025052301 · primary ns2.knipp.de

✓ Serial 2025052301 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 1h, retry 30m, expire 7d, negative TTL 1d.
✓ Primary is a public nameserver #24

The primary nameserver ns2.knipp.de is one of the listed nameservers.
✓ Contact hostmaster@kdg.de #25

The SOA RNAME hostmaster.kdg.de means hostmaster@kdg.de.
✓ Date-based serial #26

The serial 2025052301 follows the YYYYMMDDnn convention (2025-05-23).

warn

Not signed

info

5 records at the apex

✓ TTLs within range #32

TTLs: MX 1h, 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.
✓ No wildcard #34

Names that don't exist return NXDOMAIN.
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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