schneegans.de

Checked 22 October 2026, 00:01 UTC · via 8.8.8.8
!Passed with warnings
30 passed 1 warning 0 failed 2 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

pass

ns1.core-networks.de, ns2.core-networks.eu, ns3.core-networks.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.core-networks.de, ns2.core-networks.eu, ns3.core-networks.com
NS in the zone
ns1.core-networks.de, ns2.core-networks.eu, ns3.core-networks.com
NameserverAddressesNetwork (AS)Glue
ns1.core-networks.de194.213.5.254 2001:1bc0:d::fffeAS29686 PROBENETWORKS-AS - Jonas Frey trading as Probe Networks, DE AS29686 PROBENETWORKS-AS - Jonas Frey trading as Probe Networks, DE194.213.5.254 2001:1bc0:d::fffe
ns2.core-networks.eu78.111.72.98 2a02:f98:0:22::ffffAS33984 SURFPLANET-AS - Surfplanet GmbH, DE AS33984 SURFPLANET-AS - Surfplanet GmbH, DE-
ns3.core-networks.com82.96.73.254 2001:1bc0:d::ffffAS29686 PROBENETWORKS-AS - Jonas Frey trading as Probe Networks, DE AS29686 PROBENETWORKS-AS - Jonas Frey trading as Probe Networks, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.core-networks.de, ns2.core-networks.eu, ns3.core-networks.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 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS29686 (PROBENETWORKS-AS - Jonas Frey trading as Probe Networks, DE): 4 addresses; AS33984 (SURFPLANET-AS - Surfplanet GmbH, DE): 2 addresses.
  • ✓ Nameserver names under 3 TLDs #12
    Nameserver names use the TLDs .com, .de, .eu.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.core-networks.de 194.213.5.254NOERROR, 4 ms, authoritativenoyes / yesrefused9.20.30
ns1.core-networks.de 2001:1bc0:d::fffeNOERROR, 4 ms, authoritativenoyes / yesrefused9.20.30
ns2.core-networks.eu 78.111.72.98NOERROR, 8 ms, authoritativenoyes / yesrefused9.20.30
ns2.core-networks.eu 2a02:f98:0:22::ffffNOERROR, 8 ms, authoritativenoyes / yesrefused9.20.30
ns3.core-networks.com 82.96.73.254NOERROR, 4 ms, authoritativenoyes / yesrefused9.20.30
ns3.core-networks.com 2001:1bc0:d::ffffNOERROR, 4 ms, authoritativenoyes / yesrefused9.20.30

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.core-networks.de: "9.20.30"; ns2.core-networks.eu: "9.20.30"; ns3.core-networks.com: "9.20.30". Hide or replace the version string.
    #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 2024092577 · primary ns1.core-networks.de

Found

Primary (MNAME)
ns1.core-networks.de
Contact (RNAME)
hostmaster.core-networks.de
Serial
2024092577
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
ns1.core-networks.de (194.213.5.254)2024092577
ns1.core-networks.de (2001:1bc0:d::fffe)2024092577
ns2.core-networks.eu (78.111.72.98)2024092577
ns2.core-networks.eu (2a02:f98:0:22::ffff)2024092577
ns3.core-networks.com (82.96.73.254)2024092577
ns3.core-networks.com (2001:1bc0:d::ffff)2024092577

Checks

  • ✓ Serial 2024092577 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.core-networks.de is one of the listed nameservers.
  • ✓ Contact hostmaster@core-networks.de #25
    The SOA RNAME hostmaster.core-networks.de means hostmaster@core-networks.de.
  • ✓ Date-based serial #26
    The serial 2024092577 follows the YYYYMMDDnn convention (2024-09-25).

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
4 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
37106ECDSAP256SHA256 (13)SHA256 76ADEE8484D916E8…yes

DNSKEY in the zone

Key tagRoleAlgorithm
62646ZSK (256)ECDSAP256SHA256 (13)
37106KSK (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 37106 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Signatures valid until 2026-11-04 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-04 16:18 UTC.
  • ✓ NSEC3 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

pass

12 records at the apex

Found

Read from
194.213.5.254:53
TypeValueTTL
SOAns1.core-networks.de. hostmaster.core-networks.de. 2024092577 28800 7200 604800 18001800
NSns3.core-networks.com.86400
NSns2.core-networks.eu.86400
NSns1.core-networks.de.86400
A49.13.208.12886400
AAAA2a01:4f8:c013:2e0a::186400
MX10 mx1.core-networks.de.86400
MX20 mx2.core-networks.de.86400
TXT"ahrefs-site-verification_4f1d85fa691651e30defb63d977f6fe7654ac007f3ff22caec5658e97fd0f6f2"86400
TXT"google-site-verification=b1Mgrq2n3qKcp67JqeEwQ9Y3lTPbmWGCKV6xLtLOgbo"86400
TXT"v=spf1 mx a include:spf.core-networks.de -all"86400
CAA128 issue "letsencrypt.org"86400

Checks

  • ✓ TTLs within range #32
    TTLs: A 1d, AAAA 1d, MX 1d, 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: letsencrypt.org.