medienanstalt-nrw.de

Checked 21 October 2026, 23:21 UTC · via 8.8.8.8
!Passed with warnings
23 passed 1 warning 0 failed 5 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-a.tro.net, ns-b.tro.net, ns-c.tro.net, ns-d.tro.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns-a.tro.net, ns-b.tro.net, ns-c.tro.net, ns-d.tro.net
NS in the zone
ns-a.tro.net, ns-b.tro.net, ns-c.tro.net, ns-d.tro.net
NameserverAddressesNetwork (AS)Glue
ns-a.tro.net217.160.80.161 2001:8d8:fe:53:217:160:80:161AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
ns-b.tro.net217.160.81.161 2001:8d8:fe:53:217:160:81:161AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
ns-c.tro.net185.132.35.161 2607:f1c0:fe:53:185:132:35:161AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
ns-d.tro.net185.132.34.161 2607:f1c0:fe:53:185:132:34:161AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-a.tro.net, ns-b.tro.net, ns-c.tro.net, ns-d.tro.net.
  • ✓ 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.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 4 addresses; AS8560 (IONOS-AS - IONOS SE, DE): 4 addresses.
  • 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

info

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-a.tro.net 217.160.80.161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-a.tro.net 2001:8d8:fe:53:217:160:80:161NOERROR, 13 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-b.tro.net 217.160.81.161NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-b.tro.net 2001:8d8:fe:53:217:160:81:161NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-c.tro.net 185.132.35.161NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-c.tro.net 2607:f1c0:fe:53:185:132:35:161NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-d.tro.net 185.132.34.161NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-d.tro.net 2607:f1c0:fe:53:185:132:34:161NOERROR, 5 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/

Checks

  • ✓ All respond #14
    All 8 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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns-a.tro.net: "Served by PowerDNS - https://www.powerdns.com/"; ns-b.tro.net: "Served by PowerDNS - https://www.powerdns.com/"; ns-c.tro.net: "Served by PowerDNS - https://www.powerdns.com/"; ns-d.tro.net: "Served by PowerDNS - https://www.powerdns.com/".
    #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 2025122304 · primary ns-a.tro.net

Found

Primary (MNAME)
ns-a.tro.net
Contact (RNAME)
hostmaster.tro.net
Serial
2025122304
Refresh / retry
43200 s / 7200 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns-a.tro.net (217.160.80.161)2025122304
ns-a.tro.net (2001:8d8:fe:53:217:160:80:161)2025122304
ns-b.tro.net (217.160.81.161)2025122304
ns-b.tro.net (2001:8d8:fe:53:217:160:81:161)2025122304
ns-c.tro.net (185.132.35.161)2025122304
ns-c.tro.net (2607:f1c0:fe:53:185:132:35:161)2025122304
ns-d.tro.net (185.132.34.161)2025122304
ns-d.tro.net (2607:f1c0:fe:53:185:132:34:161)2025122304

Checks

  • ✓ Serial 2025122304 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 2h, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-a.tro.net is one of the listed nameservers.
  • ✓ Contact hostmaster@tro.net #25
    The SOA RNAME hostmaster.tro.net means hostmaster@tro.net.
  • ✓ Date-based serial #26
    The serial 2025122304 follows the YYYYMMDDnn convention (2025-12-23).

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

12 records at the apex

Found

Read from
217.160.80.161:53
TypeValueTTL
SOAns-a.tro.net. hostmaster.tro.net. 2025122304 43200 7200 1209600 8640086400
NSns-b.tro.net.86400
NSns-a.tro.net.86400
NSns-d.tro.net.86400
NSns-c.tro.net.86400
A93.184.56.2600
MX10 medienanstaltnrw-de03c.mail.protection.outlook.com.600
TXT"_vct87k0cs50vo5zug4v8ecl08yf1y8t"600
TXT"MS=1692B5D15232231815F370726B3986185BCD956B"600
TXT"MS=ms23164617"600
TXT"v=spf1 a ip4:213.23.123.242/32 mx include:newsmailservice.de include:_spf.mailingwork.de include:spf.protection.outlook.com include:_spf.jpberlin.de include:spf-de.emailsignatures365.com ip6:2603:10a6:20b:45b::22 ip6:2603:10a6:102:ee::13 ip6:2603:10a6:20b" ":45b::4 ip4:151.189.113.76/32 ~all"600
TXT"knowbe4-site-verification=9c746b54bfc6277553b777cf073bc701"600

Checks

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