Domain report: eco.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

warn

dns01.cix.de, dns02.cix.de

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: dns01.cix.de, dns02.cix.de
NS in the zone: dns01.cix.de, dns02.cix.de

Nameserver	Addresses	Network (AS)	Glue
dns01.cix.de	46.31.121.131 2a02:c50:6209:702::3	AS51531 DECIX-MGMT-AS - DE-CIX Management GmbH, DE AS51531 DECIX-MGMT-AS - DE-CIX Management GmbH, DE	46.31.121.131
dns02.cix.de	78.47.156.210 2a01:4f8:c0:2762::3	AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE	78.47.156.210

Checks

i

2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns01.cix.de, dns02.cix.de.

#6
✓ Parent and zone agree #7

The parent delegation and the zone's NS records list the same nameservers.
!

Glue differs from the zone

The addresses at the parent (glue) differ from the addresses in the zone: dns01.cix.de (glue 46.31.121.131, zone 46.31.121.131, 2a02:c50:6209:702::3); dns02.cix.de (glue 78.47.156.210, zone 78.47.156.210, 2a01:4f8:c0:2762::3). Update the glue at your registrar.

#8
✓ 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.
✓ 2 autonomous systems #11

The nameservers are spread over: AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 2 addresses; AS51531 (DECIX-MGMT-AS - DE-CIX Management GmbH, DE): 2 addresses.
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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.

Nameservers

fail

4 of 4 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
dns01.cix.de 46.31.121.131	NOERROR, 5 ms, authoritative	no	yes / yes	refused	none of your business
dns01.cix.de 2a02:c50:6209:702::3	NOERROR, 5 ms, authoritative	no	yes / yes	refused	none of your business
dns02.cix.de 78.47.156.210	NOERROR, 3 ms, authoritative	no	no / yes	refused	none of your business
dns02.cix.de 2a01:4f8:c0:2762::3	NOERROR, 3 ms, authoritative	no	no / yes	refused	none of your business

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.
i

Identifying string disclosed

These nameservers answer version queries with a string that is not a version number: dns01.cix.de: "none of your business"; dns02.cix.de: "none of your business".

#17
✓ Zone transfers refused #18

No nameserver allows a zone transfer to the public.
✗

No DNS over TCP

DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: dns02.cix.de (78.47.156.210): dial tcp 78.47.156.210:53: connect: connection refused; dns02.cix.de (2a01:4f8:c0:2762::3): dial tcp [2a01:4f8:c0:2762::3]:53: connect: connection refused.

#19
✓ EDNS supported #20

All nameservers support EDNS(0).
✓ Public addresses #21

All nameserver addresses are publicly routable.

SOA

info

serial 2019032755 · primary ns.de-cix.net

Found

Primary (MNAME): ns.de-cix.net
Contact (RNAME): hostmaster.de-cix.net
Serial: 2019032755
Refresh / retry: 43200 s / 900 s
Expire: 604800 s
Negative TTL: 1800 s

Serial per nameserver

Nameserver	Serial
dns01.cix.de (46.31.121.131)	2019032755
dns01.cix.de (2a02:c50:6209:702::3)	2019032755
dns02.cix.de (78.47.156.210)	2019032755
dns02.cix.de (2a01:4f8:c0:2762::3)	2019032755

Checks

✓ Serial 2019032755 everywhere #22

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

SOA refresh 12h, retry 15m, expire 7d, negative TTL 30m.
i

Hidden master

The primary nameserver ns.de-cix.net 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@de-cix.net #25

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

The serial 2019032755 follows the YYYYMMDDnn convention (2019-03-27).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 10 iterations, 4-byte salt
Signatures valid until: 31 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
44500	RSASHA256 (8)	SHA256 59D92A27A34CE543…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
15165	ZSK (256)	RSASHA256 (8)
44500	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 44500 (SHA256).
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ Signatures valid until 2026-10-31 #30

The earliest DNSKEY/SOA signature expires at 2026-10-31 23:49 UTC.
!

NSEC3 with extra iterations or salt

NSEC3 uses 10 iterations and a 4-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.

#31

Records

info

15 records at the apex

Found

Read from: 46.31.121.131:53

Type	Value	TTL
SOA	ns.de-cix.net. hostmaster.de-cix.net. 2019032755 43200 900 604800 1800	3600
NS	dns02.cix.de.	3600
NS	dns01.cix.de.	3600
A	46.31.121.137	86400
AAAA	2a02:c50:6209:702::9	86400
MX	20 mx01.for-the-inter.net.	3600
MX	20 mx02.for-the-inter.net.	3600
TXT	"swisssign-check=H6Ubn_H3MD901bje6aM01P1OG7o"	3600
TXT	"v=spf1 a:webprod01.eco.de include:spf.for-the-inter.net -all"	3600
TXT	"google-gws-recovery-domain-verification=67318532"	3600
TXT	"google-site-verification=MukJb0brI6F4Zb-S3uqBpGHn9msORU10cfaItLq3j9U"	3600
TXT	"atlassian-domain-verification=zY4PSzljeMkuVEMxIvVy4qZKERChzzDSniqjYOWKqtIJzaHK4D47KUq2XJLgQEw3"	3600
TXT	"google-site-verification=CGVOMN0szXnCZIyO8WgWqoX0yKN4UVXNpI93632tDEg"	3600
TXT	"uber-domain-verification=6a7e425f-e633-4914-b089-3924e6468c4e"	3600
TXT	"apple-domain-verification=5SSh0c5UCsVGWPcW"	3600

Checks

✓ TTLs within range #32

TTLs: A 1d, AAAA 1d, 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.
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