atemwegsliga.de

Checked 21 October 2026, 21:31 UTC · via 8.8.8.8
!Passed with warnings
21 passed 2 warnings 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

warn

a.imdd.de, b.imdd.de, c.imdd.de, d.imdd.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
a.imdd.de, b.imdd.de, c.imdd.de, d.imdd.de
NS in the zone
a.imdd.de, b.imdd.de, c.imdd.de, d.imdd.de
NameserverAddressesNetwork (AS)Glue
a.imdd.de217.160.80.161 2001:8d8:fe:53:217:160:80:161AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE62.116.159.4 2001:4178:3:a357:62:116:159:4
b.imdd.de217.160.81.161 2001:8d8:fe:53:217:160:81:161AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE217.160.113.37 2001:8d8:580:401:217:160:113:37
c.imdd.de185.132.35.161 2607:f1c0:fe:53:185:132:35:161AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB89.146.248.4 2a01:130:2000:118:89:146:248:4
d.imdd.de185.132.34.161 2607:f1c0:fe:53:185:132:34:161AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB74.208.254.4 2607:f1c0:1800:8091:74:208:254:4

Checks

  • ✓ 4 nameservers #6
    Delegated to a.imdd.de, b.imdd.de, c.imdd.de, d.imdd.de.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: a.imdd.de (glue 62.116.159.4, 2001:4178:3:a357:62:116:159:4, zone 217.160.80.161, 2001:8d8:fe:53:217:160:80:161); b.imdd.de (glue 217.160.113.37, 2001:8d8:580:401:217:160:113:37, zone 217.160.81.161, 2001:8d8:fe:53:217:160:81:161); c.imdd.de (glue 89.146.248.4, 2a01:130:2000:118:89:146:248:4, zone 185.132.35.161, 2607:f1c0:fe:53:185:132:35:161); d.imdd.de (glue 74.208.254.4, 2607:f1c0:1800:8091:74:208:254:4, zone 185.132.34.161, 2607:f1c0:fe:53:185:132:34:161). Update the glue at your registrar.
    #8
  • ✓ 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 .de
    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
a.imdd.de 217.160.80.161NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
a.imdd.de 2001:8d8:fe:53:217:160:80:161NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
b.imdd.de 217.160.81.161NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
b.imdd.de 2001:8d8:fe:53:217:160:81:161NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
c.imdd.de 185.132.35.161NOERROR, 5 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
c.imdd.de 2607:f1c0:fe:53:185:132:35:161NOERROR, 5 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
d.imdd.de 185.132.34.161NOERROR, 6 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
d.imdd.de 2607:f1c0:fe:53:185:132:34:161NOERROR, 6 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: a.imdd.de: "Served by PowerDNS - https://www.powerdns.com/"; b.imdd.de: "Served by PowerDNS - https://www.powerdns.com/"; c.imdd.de: "Served by PowerDNS - https://www.powerdns.com/"; d.imdd.de: "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 2025122004 · primary a.imdd.de

Found

Primary (MNAME)
a.imdd.de
Contact (RNAME)
gross.imdd.de
Serial
2025122004
Refresh / retry
39940 s / 14400 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
a.imdd.de (217.160.80.161)2025122004
a.imdd.de (2001:8d8:fe:53:217:160:80:161)2025122004
b.imdd.de (217.160.81.161)2025122004
b.imdd.de (2001:8d8:fe:53:217:160:81:161)2025122004
c.imdd.de (185.132.35.161)2025122004
c.imdd.de (2607:f1c0:fe:53:185:132:35:161)2025122004
d.imdd.de (185.132.34.161)2025122004
d.imdd.de (2607:f1c0:fe:53:185:132:34:161)2025122004

Checks

  • ✓ Serial 2025122004 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 11h5m40s, retry 4h, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver a.imdd.de is one of the listed nameservers.
  • ✓ Contact gross@imdd.de #25
    The SOA RNAME gross.imdd.de means gross@imdd.de.
  • ✓ Date-based serial #26
    The serial 2025122004 follows the YYYYMMDDnn convention (2025-12-20).

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

10 records at the apex

Found

Read from
217.160.80.161:53
TypeValueTTL
SOAa.imdd.de. gross.imdd.de. 2025122004 39940 14400 604800 300300
NSd.imdd.de.300
NSb.imdd.de.300
NSa.imdd.de.300
NSc.imdd.de.300
A85.214.49.337200
MX10 mx.spamexperts.com.7200
MX20 fallbackmx.spamexperts.eu.7200
MX30 lastmx.spamexperts.net.7200
TXT"v=spf1 mx a -all"7200

Checks

  • ✓ TTLs within range #32
    TTLs: A 2h, MX 2h, NS 5m. The NS TTL at the parent is 1d and in the zone 5m; 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