Domain report: datev.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

ns01.datev.de, ns02.datev.com

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: ns01.datev.de, ns02.datev.com
NS in the zone: ns01.datev.de, ns02.datev.com

Nameserver	Addresses	Network (AS)	Glue
ns01.datev.de	193.27.50.5 2a00:e50:f155:a::5	AS15451 DATEV-AS - DATEV eG, DE AS15451 DATEV-AS - DATEV eG, DE	193.27.50.5 2a00:e50:f155:a::5
ns02.datev.com	193.27.54.5 2a00:e50:f157::5	AS15451 DATEV-AS - DATEV eG, DE AS15451 DATEV-AS - DATEV eG, DE	-

Checks

i

2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns01.datev.de, ns02.datev.com.

#6
✓ 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: ns01.datev.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 2 IPv6 /48s.
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS15451 (DATEV-AS - DATEV eG, 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
✓ Nameserver names under 2 TLDs #12

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

Every nameserver has an IPv6 address.

Nameservers

pass

4 of 4 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns01.datev.de 193.27.50.5	NOERROR, 6 ms, authoritative	no	yes / yes	refused	-
ns01.datev.de 2a00:e50:f155:a::5	NOERROR, 8 ms, authoritative	no	yes / yes	refused	-
ns02.datev.com 193.27.54.5	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-
ns02.datev.com 2a00:e50:f157::5	NOERROR, 7 ms, authoritative	no	yes / yes	refused	-

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 2610212356 · primary ns01.datev.de

Found

Primary (MNAME): ns01.datev.de
Contact (RNAME): dnsmaster.datev.de
Serial: 2610212356
Refresh / retry: 21600 s / 3600 s
Expire: 604800 s
Negative TTL: 600 s

Serial per nameserver

Nameserver	Serial
ns01.datev.de (193.27.50.5)	2610212356
ns01.datev.de (2a00:e50:f155:a::5)	2610212356
ns02.datev.com (193.27.54.5)	2610212356
ns02.datev.com (2a00:e50:f157::5)	2610212356

Checks

✓ Serial 2610212356 everywhere #22

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

SOA refresh 6h, retry 1h, expire 7d, negative TTL 10m.
✓ Primary is a public nameserver #24

The primary nameserver ns01.datev.de is one of the listed nameservers.
✓ Contact dnsmaster@datev.de #25

The SOA RNAME dnsmaster.datev.de means dnsmaster@datev.de.
✓ Timestamp serial #26

The serial 2610212356 is a Unix timestamp (2052-09-17 18:59 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: 18 November 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
18297	ECDSAP256SHA256 (13)	SHA256 67EC910EF4524354…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
18297	KSK (257)	ECDSAP256SHA256 (13)

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 18297 (SHA256).
✓ Modern algorithms #29

Key algorithms: ECDSAP256SHA256 (13).
✓ Signatures valid until 2026-11-18 #30

The earliest DNSKEY/SOA signature expires at 2026-11-18 21:56 UTC.
✓ NSEC3 as recommended #31

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

Records

pass

15 records at the apex

Found

Read from: 193.27.50.5:53

Type	Value	TTL
SOA	ns01.datev.de. dnsmaster.datev.de. 2610212356 21600 3600 604800 600	3600
NS	ns01.datev.de.	3600
NS	ns02.datev.com.	3600
A	193.27.50.202	3600
MX	0 cdxmailin01.datev.de.	3600
MX	0 cdxmailin02.datev.com.	3600
TXT	"v=spf1 include:_spf.datev.de ~all"	3600
TXT	"jamf-site-verification=Wq3I6ioOWAoilFKc_reM3Q"	3600
TXT	"hcp-domain-verification=1106efa57eaa39bcb3911b49a40ba18e2667cdc4b8b9ec034ec86e9023419708"	3600
CAA	0 iodef "mailto:caa@reports.datev.de"	3600
CAA	0 issue "digicert.com"	3600
CAA	0 issue "globalsign.com"	3600
CAA	0 issue "letsencrypt.org"	3600
CAA	0 issue "quovadisglobal.com"	3600
CAA	0 issuevmc ";"	3600

Checks

✓ TTLs within range #32

TTLs: A 1h, 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.
✓ CAA restricts issuance #35

Certificates may be issued by: digicert.com, globalsign.com, letsencrypt.org, quovadisglobal.com.