Domain report: mensa.de

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

dns.noris.ch, dns.noris.de, dns.noris.net

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: dns.noris.ch, dns.noris.de, dns.noris.net
NS in the zone: dns.noris.ch, dns.noris.de, dns.noris.net

Nameserver	Addresses	Network (AS)	Glue
dns.noris.ch	194.31.2.65 2001:780:53d3::53	AS12337 NORIS-NETWORK - noris network AG, DE AS12337 NORIS-NETWORK - noris network AG, DE	-
dns.noris.de	192.109.102.65 2001:780:53d2::53	AS12337 NORIS-NETWORK - noris network AG, DE AS12337 NORIS-NETWORK - noris network AG, DE	192.109.102.65 2001:780:53d2::53
dns.noris.net	213.95.0.65 2001:780:53d1::53	AS12337 NORIS-NETWORK - noris network AG, DE AS12337 NORIS-NETWORK - noris network AG, DE	-

Checks

✓ 3 nameservers #6

Delegated to dns.noris.ch, dns.noris.de, dns.noris.net.
✓ 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 3 IPv4 /24s and 3 IPv6 /48s.
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS12337 (NORIS-NETWORK - noris network AG, DE): 6 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

#11
✓ Nameserver names under 3 TLDs #12

Nameserver names use the TLDs .ch, .de, .net.
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

Nameservers

pass

6 of 6 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
dns.noris.ch 194.31.2.65	NOERROR, 7 ms, authoritative	no	yes / yes	refused	-
dns.noris.ch 2001:780:53d3::53	NOERROR, 7 ms, authoritative	no	yes / yes	refused	-
dns.noris.de 192.109.102.65	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-
dns.noris.de 2001:780:53d2::53	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-
dns.noris.net 213.95.0.65	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-
dns.noris.net 2001:780:53d1::53	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-

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.
✓ 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

info

serial 2020321901 · primary dns.mensa.de

Found

Primary (MNAME): dns.mensa.de
Contact (RNAME): hostmaster.mensa.de
Serial: 2020321901
Refresh / retry: 86400 s / 1800 s
Expire: 2419200 s
Negative TTL: 600 s

Serial per nameserver

Nameserver	Serial
dns.noris.ch (194.31.2.65)	2020321901
dns.noris.ch (2001:780:53d3::53)	2020321901
dns.noris.de (192.109.102.65)	2020321901
dns.noris.de (2001:780:53d2::53)	2020321901
dns.noris.net (213.95.0.65)	2020321901
dns.noris.net (2001:780:53d1::53)	2020321901

Checks

✓ Serial 2020321901 everywhere #22

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

SOA refresh 1d, retry 30m, expire 28d, negative TTL 10m.
i

Hidden master

The primary nameserver dns.mensa.de is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.

#24
✓ Contact hostmaster@mensa.de #25

The SOA RNAME hostmaster.mensa.de means hostmaster@mensa.de.
✓ Timestamp serial #26

The serial 2020321901 is a Unix timestamp (2034-01-08 08:31 UTC).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 0 iterations, 0-byte salt
Signatures valid until: 1 November 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
64876	RSASHA256 (8)	SHA256 493B82E254369DA0…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
18874	ZSK (256)	RSASHA256 (8)
64876	KSK (257)	RSASHA256 (8)

Checks

✓ Signed and validated #27

The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
✓ DS matches a key #28

The DS record at the parent matches a key in the zone: key tag 64876 (SHA256).
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ Signatures valid until 2026-11-01 #30

The earliest DNSKEY/SOA signature expires at 2026-11-01 18:40 UTC.
✓ NSEC3 as recommended #31

The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

info

13 records at the apex

Found

Read from: 194.31.2.65:53

Type	Value	TTL
SOA	dns.mensa.de. hostmaster.mensa.de. 2020321901 86400 1800 2419200 600	86400
NS	dns.noris.net.	86400
NS	dns.noris.de.	86400
NS	dns.noris.ch.	86400
A	5.75.130.46	3600
AAAA	2a01:4f8:1c1c:e119::1	3600
MX	1 mensa.de.	3600
TXT	"MS=ms70645002"	3600
TXT	"google-site-verification=sVe8cddtdhDKtAbWzP2mY6mOPlw6odcv5kMuRk1QXmY"	3600
TXT	"v=spf1 mx a:it-2643.mensa.de a:it-2853.mensa.de a:mindwahl.de ~all"	3600
CAA	0 issue "letsencrypt.org"	3600
CAA	0 issue "digicert.com"	3600
CAA	0 iodef "mailto:hostmaster@mensa.de"	3600

Checks

✓ TTLs within range #32

TTLs: A 1h, AAAA 1h, MX 1h, NS 1d.
✓ 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: letsencrypt.org, digicert.com.