schmetterling-argus.de

Checked 22 October 2026, 00:01 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

ns01.schmetterling.de, ns02.schmetterling.de, ns03.schmetterling.de, ns04.schmetterling.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns01.schmetterling.de, ns02.schmetterling.de, ns03.schmetterling.de, ns04.schmetterling.de
NS in the zone
ns01.schmetterling.de, ns02.schmetterling.de, ns03.schmetterling.de, ns04.schmetterling.de
NameserverAddressesNetwork (AS)Glue
ns01.schmetterling.de217.160.80.161 2001:8d8:fe:53:217:160:80:161AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE217.160.80.161 2001:8d8:fe:53:217:160:80:161
ns02.schmetterling.de217.160.81.161 2001:8d8:fe:53:217:160:81:161AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE217.160.81.161 2001:8d8:fe:53:217:160:81:161
ns03.schmetterling.de185.132.35.161 2607:f1c0:fe:53:185:132:35:161AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB185.132.35.161 2607:f1c0:fe:53:185:132:35:161
ns04.schmetterling.de185.132.34.161 2607:f1c0:fe:53:185:132:34:161AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB185.132.34.161 2607:f1c0:fe:53:185:132:34:161

Checks

  • ✓ 4 nameservers #6
    Delegated to ns01.schmetterling.de, ns02.schmetterling.de, ns03.schmetterling.de, ns04.schmetterling.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.
  • ✓ 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
ns01.schmetterling.de 217.160.80.161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns01.schmetterling.de 2001:8d8:fe:53:217:160:80:161NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns02.schmetterling.de 217.160.81.161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns02.schmetterling.de 2001:8d8:fe:53:217:160:81:161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns03.schmetterling.de 185.132.35.161NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns03.schmetterling.de 2607:f1c0:fe:53:185:132:35:161NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns04.schmetterling.de 185.132.34.161NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns04.schmetterling.de 2607:f1c0:fe:53:185:132:34:161NOERROR, 4 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: ns01.schmetterling.de: "Served by PowerDNS - https://www.powerdns.com/"; ns02.schmetterling.de: "Served by PowerDNS - https://www.powerdns.com/"; ns03.schmetterling.de: "Served by PowerDNS - https://www.powerdns.com/"; ns04.schmetterling.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 2026010961 · primary ns01.schmetterling.de

Found

Primary (MNAME)
ns01.schmetterling.de
Contact (RNAME)
domain.schmetterling.de
Serial
2026010961
Refresh / retry
39940 s / 14400 s
Expire
604800 s
Negative TTL
43200 s

Serial per nameserver

NameserverSerial
ns01.schmetterling.de (217.160.80.161)2026010961
ns01.schmetterling.de (2001:8d8:fe:53:217:160:80:161)2026010961
ns02.schmetterling.de (217.160.81.161)2026010961
ns02.schmetterling.de (2001:8d8:fe:53:217:160:81:161)2026010961
ns03.schmetterling.de (185.132.35.161)2026010961
ns03.schmetterling.de (2607:f1c0:fe:53:185:132:35:161)2026010961
ns04.schmetterling.de (185.132.34.161)2026010961
ns04.schmetterling.de (2607:f1c0:fe:53:185:132:34:161)2026010961

Checks

  • ✓ Serial 2026010961 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 11h5m40s, retry 4h, expire 7d, negative TTL 12h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns01.schmetterling.de is one of the listed nameservers.
  • ✓ Contact domain@schmetterling.de #25
    The SOA RNAME domain.schmetterling.de means domain@schmetterling.de.
  • ✓ Date-based serial #26
    The serial 2026010961 follows the YYYYMMDDnn convention (2026-01-09).

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

9 records at the apex

Found

Read from
217.160.80.161:53
TypeValueTTL
SOAns01.schmetterling.de. domain.schmetterling.de. 2026010961 39940 14400 604800 4320043200
NSns03.schmetterling.de.43200
NSns02.schmetterling.de.43200
NSns04.schmetterling.de.43200
NSns01.schmetterling.de.43200
A213.95.81.3243200
MX10 mx.schmetterling-argus.de.43200
TXT"v=spf1 mx ip4:213.95.81.30 ip4:213.95.81.248 ip4:62.159.240.138 ip4:62.159.240.142 -all"43200
TXT"_vicre674wrppdlhj34udcfhlt2kaem6"43200

Checks

  • ✓ TTLs within range #32
    TTLs: A 12h, MX 12h, NS 12h. The NS TTL at the parent is 1d and in the zone 12h; 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