adelphi.de

Checked 21 October 2026, 21:28 UTC · via 8.8.8.8
!Passed with warnings
21 passed 1 warning 0 failed 7 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

ns71.domaincontrol.com, ns72.domaincontrol.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns71.domaincontrol.com, ns72.domaincontrol.com
NS in the zone
ns71.domaincontrol.com, ns72.domaincontrol.com
NameserverAddressesNetwork (AS)Glue
ns71.domaincontrol.com97.74.105.46 2603:5:2194::2eAS44273 GODADDY-DNS - Host Europe GmbH, DE AS44273 GODADDY-DNS - Host Europe GmbH, DE-
ns72.domaincontrol.com173.201.73.46 2603:5:2294::2eAS44273 GODADDY-DNS - Host Europe GmbH, DE AS44273 GODADDY-DNS - Host Europe GmbH, DE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns71.domaincontrol.com, ns72.domaincontrol.com.
    #6
  • ✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS44273 (GODADDY-DNS - Host Europe GmbH, 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
  • i
    All nameserver names under .com
    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

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns71.domaincontrol.com 97.74.105.46NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns71.domaincontrol.com 2603:5:2194::2eNOERROR, 4 ms, authoritativenoyes / yesrefused-
ns72.domaincontrol.com 173.201.73.46NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns72.domaincontrol.com 2603:5:2294::2eNOERROR, 3 ms, authoritativenoyes / yesrefused-

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 2026101600 · primary ns71.domaincontrol.com

Found

Primary (MNAME)
ns71.domaincontrol.com
Contact (RNAME)
dns.jomax.net
Serial
2026101600
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns71.domaincontrol.com (97.74.105.46)2026101600
ns71.domaincontrol.com (2603:5:2194::2e)2026101600
ns72.domaincontrol.com (173.201.73.46)2026101600
ns72.domaincontrol.com (2603:5:2294::2e)2026101600

Checks

  • ✓ Serial 2026101600 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns71.domaincontrol.com is one of the listed nameservers.
  • ✓ Contact dns@jomax.net #25
    The SOA RNAME dns.jomax.net means dns@jomax.net.
  • ✓ Date-based serial #26
    The serial 2026101600 follows the YYYYMMDDnn convention (2026-10-16).

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

info

19 records at the apex

Found

Read from
97.74.105.46:53
TypeValueTTL
SOAns71.domaincontrol.com. dns.jomax.net. 2026101600 28800 7200 604800 6003600
NSns71.domaincontrol.com.3600
NSns72.domaincontrol.com.3600
A49.13.114.2053600
MX20 mxlb.ispgateway.de.3600
MX10 mail.adelphi.de.3600
TXT"v=spf1 mx include:_spf.elasticemail.com include:spf.protection.outlook.com include:_spf.psm.knowbe4.com include:spf.emailsys.net include:_spf.zimpel.de a include:ispgateway.de ip4:213.61.111.208/28 ip4:167.235.229.107 ip4:91.107.196.83 ip4:49.13.2.98 ip4:" "49.13.80.192 ip4:49.13.114.205 ip4:188.34.165.43 ip4:78.46.239.251 ip4:188.34.182.172 ip4:88.99.126.247 ip4:168.119.187.85 ip4:128.140.54.107 ~all"3600
TXT"google-site-verification=5BZYLYJmRO9OAEb53GRaCDBKhXBc8k1Z7F_yuenXCH4"3600
TXT"mentimeter-37fec381-b4b8-4b22-a116-0d99a41ac9f2"3600
TXT"MS=2A5A3B8A993234FC05668123E58C3147A2FA58B3"3600
TXT"logmein-verification-code=b8745916-3a7e-4b9a-9aba-84064013dc19"3600
TXT"cisco-ci-domain-verification=56216b9c5c65dc407038d8d39f054b57009e401aa04502e93018b0d4f2db20f5"3600
TXT"miro-verification=f0002bad755aa8c89d0908a50c480e6623848d05"3600
TXT"ZOOM_verify_d8VRHZDZSf-097NlbX0lLA"3600
TXT"ti4chDoZBwdiwhWpCCEdJSR2nfQngAPwVzjjhwHYzrnC6QBTW60+wdmoxpoTF8/xBLjLpLqN2aYB4XkiU51tIA=="3600
TXT"apple-domain-verification=7VCaIrizgulaJXre"3600
TXT"abuseipdb-verification=y2VqHiBH"3600
TXT"knowbe4-site-verification=6e0cfaa3470a46abbcf54490bb6cd7d3"3600
TXT"brevo-code:8d737491468e7326d8b90eaf95fb446b"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.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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