hs-fresenius.de

Checked 21 October 2026, 22:51 UTC · via 8.8.8.8
!Passed with warnings
22 passed 1 warning 0 failed 6 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

ns.europe.adacor.net, ns5.adacor.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.europe.adacor.net, ns5.adacor.net
NS in the zone
ns.europe.adacor.net, ns5.adacor.net
NameserverAddressesNetwork (AS)Glue
ns.europe.adacor.net194.58.196.58 2a01:3f1:858::53AS8674 NETNOD-IX - Netnod AB, SE AS8674 NETNOD-IX - Netnod AB, SE-
ns5.adacor.net185.42.137.113 2a01:3f0:400::58AS8674 NETNOD-IX - Netnod AB, SE AS8674 NETNOD-IX - Netnod AB, SE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns.europe.adacor.net, ns5.adacor.net.
    #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 (AS8674 (NETNOD-IX - Netnod AB, SE): 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 .net
    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
ns.europe.adacor.net 194.58.196.58NOERROR, 8 ms, authoritativenoyes / yesrefused-
ns.europe.adacor.net 2a01:3f1:858::53NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns5.adacor.net 185.42.137.113NOERROR, 26 ms, authoritativenoyes / yesrefused-
ns5.adacor.net 2a01:3f0:400::58NOERROR, 25 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 2026091003 · primary ns.europe.adacor.net

Found

Primary (MNAME)
ns.europe.adacor.net
Contact (RNAME)
hostmaster.adacor.net
Serial
2026091003
Refresh / retry
10000 s / 1800 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns.europe.adacor.net (194.58.196.58)2026091003
ns.europe.adacor.net (2a01:3f1:858::53)2026091003
ns5.adacor.net (185.42.137.113)2026091003
ns5.adacor.net (2a01:3f0:400::58)2026091003

Checks

  • ✓ Serial 2026091003 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h46m40s, retry 30m, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.europe.adacor.net is one of the listed nameservers.
  • ✓ Contact hostmaster@adacor.net #25
    The SOA RNAME hostmaster.adacor.net means hostmaster@adacor.net.
  • ✓ Date-based serial #26
    The serial 2026091003 follows the YYYYMMDDnn convention (2026-09-10).

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

20 records at the apex

Found

Read from
194.58.196.58:53
TypeValueTTL
SOAns.europe.adacor.net. hostmaster.adacor.net. 2026091003 10000 1800 604800 36003600
NSns5.adacor.net.3600
NSns.europe.adacor.net.3600
A34.8.130.143600
AAAA2600:1901:0:46dc::300
MX15 hsfresenius-de0e.mail.protection.outlook.com.900
TXT"anthropic-domain-verification-hfmhn2=IfdE1axjp8s3SqW26jlGTIo3I"3600
TXT"202005182048575q7souo6i10j6zwxru1l0vjmkbv4qdi1tbdftzmuugsrjj287d"3600
TXT"google-site-verification=ZgZ0oMtj9L9Clo3ZHfTgXP5hVFP9SRqj9gQfYShR5u8"3600
TXT"google-site-verification=htkCqn6XSNUIFqyQQyA5yzzslzuqsiPSlMq0qzM44eM"3600
TXT"_globalsign-domain-verification=P6EbLHHre8tQDC8CAYpieeB62W1ghRXyocZUNEzPDM"3600
TXT"_globalsign-domain-verification=lJ6-fRXqfP1jw-QxO7P55t3nKD0Zm2NCE_kaFlSkF9"3600
TXT"stripe-verification=14fb2120e769c4e61db74e75c48a98cfb418b94bddc86cd384e00bbc405916d1"3600
TXT"/U86uyNntEQFkbracnzXSwa8gM958f5wwHpMt2XiNd+V8gjBkYyLI1WktPg+Jx3yvXmBIIELq3+GfG9kOJ9vIw=="3600
TXT"adobe-idp-site-verification=1b1a79e71caac6c511a9514b1f2da07739846b105f832cf4be3edd5bc784019e"3600
TXT"atlassian-domain-verification=ftBxUyXTplwq5wcaNRewrT70Ci0KU967kZh7Rlb81nz/Xhw0lvIgk6HYK4npHSlk"3600
TXT"v=spf1 mx ip4:195.37.15.209 ip4:188.172.113.195 ip4:116.203.110.13 ip4:159.69.3.23 include:spf.protection.outlook.com include:mail.zendesk.com include:_spf.salesforce.com include:spf.mailjet.com a:cognos-ag.managed-otrs.com ip4:20.52.148.139 -all"3600
TXT"ZOOM_verify_LK5aNHV9SSq_d3Q--rGjhA"3600
TXT"swisssign-check=tkSmdDtpzSiA_P3I8Jg_TJAcq6I"3600
TXT"autodesk-domain-verification=ERncffRbLGlIE1pZHEfb"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, AAAA 5m, MX 15m, 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