perlentaucher.de

Checked 21 October 2026, 23:50 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

dns001.intares.net, dns002.intares.net, dns003.intares.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns001.intares.net, dns002.intares.net, dns003.intares.net
NS in the zone
dns001.intares.net, dns002.intares.net, dns003.intares.net
NameserverAddressesNetwork (AS)Glue
dns001.intares.net213.183.192.1 2a00:4e00:1:1::11AS15368 INTARES - Intares GmbH, DE AS15368 INTARES - Intares GmbH, DE-
dns002.intares.net212.9.177.240 2001:14b0:102:0:212:9:177:240AS12374 LFNET-AS01 - LF.net Netzwerksysteme GmbH, DE AS12374 LFNET-AS01 - LF.net Netzwerksysteme GmbH, DE-
dns003.intares.net213.183.208.108 2a00:4e00:4000:100::108AS15368 INTARES - Intares GmbH, DE AS15368 INTARES - Intares GmbH, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to dns001.intares.net, dns002.intares.net, dns003.intares.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 3 IPv4 /24s and 3 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS12374 (LFNET-AS01 - LF.net Netzwerksysteme GmbH, DE): 2 addresses; AS15368 (INTARES - Intares GmbH, 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

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns001.intares.net 213.183.192.1NOERROR, 12 ms, authoritativenoyes / yesrefusedIf you like to know the version of our dns please ask our hostmaster for help
dns001.intares.net 2a00:4e00:1:1::11NOERROR, 11 ms, authoritativenoyes / yesrefusedIf you like to know the version of our dns please ask our hostmaster for help
dns002.intares.net 212.9.177.240NOERROR, 7 ms, authoritativenoyes / yesrefusedIf you like to know the version of our dns please ask our hostmaster for help
dns002.intares.net 2001:14b0:102:0:212:9:177:240NOERROR, 14 ms, authoritativenoyes / yesrefusedIf you like to know the version of our dns please ask our hostmaster for help
dns003.intares.net 213.183.208.108NOERROR, 10 ms, authoritativenoyes / yesrefusedIf you like to know the version of our dns please ask our hostmaster for help
dns003.intares.net 2a00:4e00:4000:100::108NOERROR, 10 ms, authoritativenoyes / yesrefusedIf you like to know the version of our dns please ask our hostmaster for help

Checks

  • ✓ All respond #14
    All 6 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: dns001.intares.net: "If you like to know the version of our dns please ask our hostmaster for help"; dns002.intares.net: "If you like to know the version of our dns please ask our hostmaster for help"; dns003.intares.net: "If you like to know the version of our dns please ask our hostmaster for help".
    #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 2026061901 · primary dns001.intares.net

Found

Primary (MNAME)
dns001.intares.net
Contact (RNAME)
hostmaster.intares.net
Serial
2026061901
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
dns001.intares.net (213.183.192.1)2026061901
dns001.intares.net (2a00:4e00:1:1::11)2026061901
dns002.intares.net (212.9.177.240)2026061901
dns002.intares.net (2001:14b0:102:0:212:9:177:240)2026061901
dns003.intares.net (213.183.208.108)2026061901
dns003.intares.net (2a00:4e00:4000:100::108)2026061901

Checks

  • ✓ Serial 2026061901 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns001.intares.net is one of the listed nameservers.
  • ✓ Contact hostmaster@intares.net #25
    The SOA RNAME hostmaster.intares.net means hostmaster@intares.net.
  • ✓ Date-based serial #26
    The serial 2026061901 follows the YYYYMMDDnn convention (2026-06-19).

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

14 records at the apex

Found

Read from
213.183.192.1:53
TypeValueTTL
SOAdns001.intares.net. hostmaster.intares.net. 2026061901 28800 7200 604800 864003600
NSdns003.intares.net.3600
NSdns001.intares.net.3600
NSdns002.intares.net.3600
A213.183.196.2293600
AAAA2a00:4e00:2000:121::2293600
MX20 mail2.intares.net.3600
MX30 mail3.intares.net.3600
MX10 mail.perlentaucher.de.3600
TXT"2eb2b6bebbec0f80ead37ba2964ed56376e036da712f517af0d55975476ef78"3600
TXT"v=spf1 ip4:213.183.196.226/27 ip6:2a00:4e00:2000:121::/64 a mx -all"3600
TXT"MS=ms64690785"3600
CAA0 issue "certum.eu"3600
CAA0 issuewild "certum.eu"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, AAAA 1h, MX 1h, 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.
  • 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
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: certum.eu.