adwmainz.de

Checked 21 October 2026, 21:28 UTC · via 8.8.8.8
!Passed with warnings
23 passed 2 warnings 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

b.ns14.net, c.ns14.net, d.ns14.net, ns-extern.zdv.uni-mainz.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
b.ns14.net, c.ns14.net, d.ns14.net, ns-extern.zdv.uni-mainz.de
NS in the zone
b.ns14.net, c.ns14.net, d.ns14.net, ns-extern.zdv.uni-mainz.de
NameserverAddressesNetwork (AS)Glue
b.ns14.net217.160.81.160 2001:8d8:fe:53:217:160:81:160AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
c.ns14.net185.132.35.160 2607:f1c0:fe:53:185:132:35:160AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
d.ns14.net185.132.34.160 2607:f1c0:fe:53:185:132:34:160AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
ns-extern.zdv.uni-mainz.de134.93.144.7AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE134.93.144.7

Checks

  • ✓ 4 nameservers #6
    Delegated to b.ns14.net, c.ns14.net, d.ns14.net, ns-extern.zdv.uni-mainz.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 4 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 4 addresses; AS2857 (RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE): 1 address; AS8560 (IONOS-AS - IONOS SE, DE): 2 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns-extern.zdv.uni-mainz.de.
    #13

Nameservers

warn

7 of 7 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
b.ns14.net 217.160.81.160NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
b.ns14.net 2001:8d8:fe:53:217:160:81:160NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
c.ns14.net 185.132.35.160NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
c.ns14.net 2607:f1c0:fe:53:185:132:35:160NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
d.ns14.net 185.132.34.160NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
d.ns14.net 2607:f1c0:fe:53:185:132:34:160NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-extern.zdv.uni-mainz.de 134.93.144.7NOERROR, 4 ms, authoritativenoyes / yesrefused9.20.29

Checks

  • ✓ All respond #14
    All 7 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: ns-extern.zdv.uni-mainz.de: "9.20.29". 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 2026072312 · primary ns-extern.zdv.uni-mainz.de

Found

Primary (MNAME)
ns-extern.zdv.uni-mainz.de
Contact (RNAME)
noc.uni-mainz.de
Serial
2026072312
Refresh / retry
86400 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
b.ns14.net (217.160.81.160)2026072312
b.ns14.net (2001:8d8:fe:53:217:160:81:160)2026072312
c.ns14.net (185.132.35.160)2026072312
c.ns14.net (2607:f1c0:fe:53:185:132:35:160)2026072312
d.ns14.net (185.132.34.160)2026072312
d.ns14.net (2607:f1c0:fe:53:185:132:34:160)2026072312
ns-extern.zdv.uni-mainz.de (134.93.144.7)2026072312

Checks

  • ✓ Serial 2026072312 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 2h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-extern.zdv.uni-mainz.de is one of the listed nameservers.
  • ✓ Contact noc@uni-mainz.de #25
    The SOA RNAME noc.uni-mainz.de means noc@uni-mainz.de.
  • ✓ Date-based serial #26
    The serial 2026072312 follows the YYYYMMDDnn convention (2026-07-23).

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

15 records at the apex

Found

Read from
217.160.81.160:53
TypeValueTTL
SOAns-extern.zdv.Uni-Mainz.de. noc.Uni-Mainz.de. 2026072312 86400 7200 604800 8640086400
NSd.ns14.net.86400
NSns-extern.zdv.Uni-Mainz.de.86400
NSc.ns14.net.86400
NSb.ns14.net.86400
A82.165.202.12486400
MX100 mailgate-2.zdv.Uni-Mainz.de.86400
MX100 mailgate-1.zdv.Uni-Mainz.de.86400
MX100 mailgate-3.zdv.Uni-Mainz.de.86400
TXT"v=spf1 include:uni-mainz.de -all"86400
TXT"MS=ms80218511"86400
TXT"v=spf2.0/mfrom,pra include:uni-mainz.de -all"86400
TXT"344-TXT-212"86400
TXT"brevo-code:77473b3a03bb2fb4027f0c9827fbec11"86400
TXT"academiccloud-site-verification=6mCp4aTZZPY6MJCxxfEkwmtbT"86400

Checks

  • ✓ TTLs within range #32
    TTLs: A 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.
  • 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