gdch.de

Checked 21 October 2026, 22:32 UTC · via 8.8.8.8
!Passed with warnings
28 passed 1 warning 0 failed 4 info

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

ns1.hosting.de, ns2.hosting.de, ns3.hosting.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.hosting.de, ns2.hosting.de, ns3.hosting.de
NS in the zone
ns1.hosting.de, ns2.hosting.de, ns3.hosting.de
NameserverAddressesNetwork (AS)Glue
ns1.hosting.de134.0.30.178 2a03:2900:3:1::2AS48823 AS48823 - Hosting.de GmbH, DE AS48823 AS48823 - Hosting.de GmbH, DE134.0.30.178 2a03:2900:3:1::2
ns2.hosting.de194.50.113.2 2001:4d8f:2::2AS41637 ROUTING-ANYCAST - Hosting.de GmbH, DE AS41637 ROUTING-ANYCAST - Hosting.de GmbH, DE194.50.113.2 2001:4d8f:2::2
ns3.hosting.de194.126.196.2 2a03:2902:3:1::2AS31400 ACCELERATED-IT - firstcolo GmbH, DE AS31400 ACCELERATED-IT - firstcolo GmbH, DE194.126.196.2 2a03:2902:3:1::2

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.hosting.de, ns2.hosting.de, ns3.hosting.de.
  • ✓ 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.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS31400 (ACCELERATED-IT - firstcolo GmbH, DE): 2 addresses; AS41637 (ROUTING-ANYCAST - Hosting.de GmbH, DE): 2 addresses; AS48823 (AS48823 - Hosting.de GmbH, DE): 2 addresses.
  • i
    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

pass

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.hosting.de 134.0.30.178NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns1.hosting.de 2a03:2900:3:1::2NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns2.hosting.de 194.50.113.2NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns2.hosting.de 2001:4d8f:2::2NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns3.hosting.de 194.126.196.2NOERROR, 6 ms, authoritativenoyes / yesrefused-
ns3.hosting.de 2a03:2902:3:1::2NOERROR, 7 ms, authoritativenoyes / yesrefused-

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

pass

serial 2026101500 · primary ns1.hosting.de

Found

Primary (MNAME)
ns1.hosting.de
Contact (RNAME)
hostmaster.gdch.de
Serial
2026101500
Refresh / retry
86400 s / 7200 s
Expire
3600000 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
ns1.hosting.de (134.0.30.178)2026101500
ns1.hosting.de (2a03:2900:3:1::2)2026101500
ns2.hosting.de (194.50.113.2)2026101500
ns2.hosting.de (2001:4d8f:2::2)2026101500
ns3.hosting.de (194.126.196.2)2026101500
ns3.hosting.de (2a03:2902:3:1::2)2026101500

Checks

  • ✓ Serial 2026101500 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 2h, expire 1000h, negative TTL 15m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.hosting.de is one of the listed nameservers.
  • ✓ Contact hostmaster@gdch.de #25
    The SOA RNAME hostmaster.gdch.de means hostmaster@gdch.de.
  • ✓ Date-based serial #26
    The serial 2026101500 follows the YYYYMMDDnn convention (2026-10-15).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
10 iterations, 16-byte salt
Signatures valid until
5 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
19972RSASHA256 (8)SHA256 17E928E6121DB100…yes

DNSKEY in the zone

Key tagRoleAlgorithm
47689ZSK (256)RSASHA256 (8)
19972KSK (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 19972 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: RSASHA256 (8).
  • ✓ Signatures valid until 2026-11-05 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-05 09:15 UTC.
  • !
    NSEC3 with extra iterations or salt
    NSEC3 uses 10 iterations and a 16-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

14 records at the apex

Found

Read from
134.0.30.178:53
TypeValueTTL
SOAns1.hosting.de. hostmaster.gdch.de. 2026101500 86400 7200 3600000 90086400
NSns3.hosting.de.86400
NSns2.hosting.de.86400
NSns1.hosting.de.86400
A216.150.1.114400
MX10 mail.gdch.de.14400
TXT"linkedin-site-verification=d33f7851-6a1a-4e93-a812-2047b30681e0"14400
TXT"202101032048392nis83j0oeldffprbegzvvg01lfoqjkw0294mal9kenc3so6hp"14400
TXT"2020111100334725icamo6lbsdb638djozuqkcbvmymp2wapwl271l0a2nagx2a4"14400
TXT"google-site-verification=FVkuRb47g8QQIuBwLflWeTEzyyPdKR3xyusPC6zV3lA"14400
TXT"sophos-domain-verification=148e4766d6043744e032ea60affafd4cfde2eae4"14400
TXT"kg4wnr52t5wv4ynxb6y4z2b5qmx8x4k6"14400
TXT"Sendinblue-code:285a8afac68e80c06be5672efe65d963"14400
TXT"v=spf1 include:_spf.prod.hydra.sophos.com ip4:185.219.102.128/25 ip4:148.251.113.148 ip4:62.96.227.162 a:mail.gdch.de ip4:77.32.203.80 include:spf.u2d.de include:spfa.myconvento.com ~all"14400

Checks

  • ✓ TTLs within range #32
    TTLs: A 4h, MX 4h, 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