Domain report: merten.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

pass

nsa.perf1.fr, nsb.perf1.com, nsc.perf1.com

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: nsa.perf1.fr, nsb.perf1.com, nsc.perf1.com
NS in the zone: nsa.perf1.fr, nsb.perf1.com, nsc.perf1.com

Nameserver	Addresses	Network (AS)	Glue
nsa.perf1.fr	81.92.94.100 2a01:c8:100::100	AS20756 NAMESHIELD - NAMESHIELD SAS, FR AS20756 NAMESHIELD - NAMESHIELD SAS, FR	-
nsb.perf1.com	81.92.95.100 2a01:c8:101::100	AS20756 NAMESHIELD - NAMESHIELD SAS, FR AS20756 NAMESHIELD - NAMESHIELD SAS, FR	-
nsc.perf1.com	152.89.172.100 2a09:35c0:102::100	AS209510 NAMESHIELDGRP - NAMESHIELD SAS, FR AS209510 NAMESHIELDGRP - NAMESHIELD SAS, FR	-

Checks

✓ 3 nameservers #6

Delegated to nsa.perf1.fr, nsb.perf1.com, nsc.perf1.com.
✓ 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.
✓ 2 autonomous systems #11

The nameservers are spread over: AS20756 (NAMESHIELD - NAMESHIELD SAS, FR): 4 addresses; AS209510 (NAMESHIELDGRP - NAMESHIELD SAS, FR): 2 addresses.
✓ Nameserver names under 2 TLDs #12

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

Every nameserver has an IPv6 address.

Nameservers

info

6 of 6 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
nsa.perf1.fr 81.92.94.100	NOERROR, 3 ms, authoritative	no	yes / yes	refused	Secure
nsa.perf1.fr 2a01:c8:100::100	NOERROR, 4 ms, authoritative	no	yes / yes	refused	Secure
nsb.perf1.com 81.92.95.100	NOERROR, 4 ms, authoritative	no	yes / yes	refused	Secure
nsb.perf1.com 2a01:c8:101::100	NOERROR, 9 ms, authoritative	no	yes / yes	refused	Secure
nsc.perf1.com 152.89.172.100	NOERROR, 4 ms, authoritative	no	yes / yes	refused	Secure
nsc.perf1.com 2a09:35c0:102::100	NOERROR, 4 ms, authoritative	no	yes / yes	refused	Secure

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: nsa.perf1.fr: "Secure"; nsb.perf1.com: "Secure"; nsc.perf1.com: "Secure".

#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.

SOA

pass

serial 2026101501 · primary nsa.perf1.fr

Found

Primary (MNAME): nsa.perf1.fr
Contact (RNAME): technical.nameshield.net
Serial: 2026101501
Refresh / retry: 28800 s / 7200 s
Expire: 604800 s
Negative TTL: 7200 s

Serial per nameserver

Nameserver	Serial
nsa.perf1.fr (81.92.94.100)	2026101501
nsa.perf1.fr (2a01:c8:100::100)	2026101501
nsb.perf1.com (81.92.95.100)	2026101501
nsb.perf1.com (2a01:c8:101::100)	2026101501
nsc.perf1.com (152.89.172.100)	2026101501
nsc.perf1.com (2a09:35c0:102::100)	2026101501

Checks

✓ Serial 2026101501 everywhere #22

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

SOA refresh 8h, retry 2h, expire 7d, negative TTL 2h.
✓ Primary is a public nameserver #24

The primary nameserver nsa.perf1.fr is one of the listed nameservers.
✓ Contact technical@nameshield.net #25

The SOA RNAME technical.nameshield.net means technical@nameshield.net.
✓ Date-based serial #26

The serial 2026101501 follows the YYYYMMDDnn convention (2026-10-15).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 0 iterations, 0-byte salt
Signatures valid until: 29 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
60450	ECDSAP256SHA256 (13)	SHA256 06758A890DF575AE…	yes
7339	ECDSAP256SHA256 (13)	SHA256 EDCD48D8DA02F038…	NO

DNSKEY in the zone

Key tag	Role	Algorithm
60450	KSK (257)	ECDSAP256SHA256 (13)
4081	ZSK (256)	ECDSAP256SHA256 (13)

Checks

✓ Signed and validated #27

The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
i

Unused DS records

These DS records match no key in the zone: key tag 7339 (SHA256). That is normal during a key rollover; otherwise remove them.

#28
✓ Modern algorithms #29

Key algorithms: ECDSAP256SHA256 (13).
✓ Signatures valid until 2026-10-29 #30

The earliest DNSKEY/SOA signature expires at 2026-10-29 00:00 UTC.
✓ NSEC3 as recommended #31

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

Records

info

8 records at the apex

Found

Read from: 81.92.94.100:53

Type	Value	TTL
SOA	nsa.perf1.fr. technical.nameshield.net. 2026101501 28800 7200 604800 7200	600
NS	nsb.perf1.com.	86400
NS	nsc.perf1.com.	86400
NS	nsa.perf1.fr.	86400
A	34.228.90.172	600
A	34.227.236.7	600
TXT	"_d51yn36dvr3kvys51w1zx6vcairy1qw"	300
TXT	"v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email -all"	300

Checks

✓ TTLs within range #32

TTLs: A 10m, NS 1d.
✓ 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