deejay.de

Checked 21 October 2026, 22:12 UTC · via 8.8.8.8
!Passed with warnings
22 passed 3 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

ns1.mm-com.de, ns2.mm-com.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.mm-com.de, ns2.mm-com.de
NS in the zone
ns1.mm-com.de, ns2.mm-com.de
NameserverAddressesNetwork (AS)Glue
ns1.mm-com.de193.159.244.186 2003:48:4015::100AS3320 DTAG - Deutsche Telekom AG, DE AS3320 DTAG - Deutsche Telekom AG, DE193.159.244.186 2003:48:4015::100
ns2.mm-com.de136.243.228.4 2a01:4f8:252:2a8c:1::4AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE136.243.228.4 2a01:4f8:252:2a8c:1::4

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.mm-com.de, ns2.mm-com.de.
    #6
  • ✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 2 addresses; AS3320 (DTAG - Deutsche Telekom AG, DE): 2 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

warn

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.mm-com.de 193.159.244.186NOERROR, 3 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.17
ns1.mm-com.de 2003:48:4015::100NOERROR, 3 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.17
ns2.mm-com.de 136.243.228.4NOERROR, 3 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.17
ns2.mm-com.de 2a01:4f8:252:2a8c:1::4NOERROR, 3 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.17

Checks

  • ✓ All respond #14
    All 4 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: ns1.mm-com.de: "PowerDNS Authoritative Server 4.9.17"; ns2.mm-com.de: "PowerDNS Authoritative Server 4.9.17". 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 2026101805 · primary ns1.mm-com.de

Found

Primary (MNAME)
ns1.mm-com.de
Contact (RNAME)
hostmaster.mm-com.de
Serial
2026101805
Refresh / retry
28800 s / 3600 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.mm-com.de (193.159.244.186)2026101805
ns1.mm-com.de (2003:48:4015::100)2026101805
ns2.mm-com.de (136.243.228.4)2026101805
ns2.mm-com.de (2a01:4f8:252:2a8c:1::4)2026101805

Checks

  • ✓ Serial 2026101805 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 1h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.mm-com.de is one of the listed nameservers.
  • ✓ Contact hostmaster@mm-com.de #25
    The SOA RNAME hostmaster.mm-com.de means hostmaster@mm-com.de.
  • ✓ Date-based serial #26
    The serial 2026101805 follows the YYYYMMDDnn convention (2026-10-18).

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

warn

9 records at the apex

Found

Read from
193.159.244.186:53
TypeValueTTL
SOAns1.mm-com.de. hostmaster.mm-com.de. 2026101805 28800 3600 604800 8640060
NSns1.mm-com.de.86400
NSns2.mm-com.de.86400
A91.24.162.960
MX10 mail.deejay.de.60
TXT"v=spf1 mx ip4:91.24.162.0/28 -all"60
CAA0 issue "letsencrypt.org"86400
CAA0 iodef "mailto:hostmaster@deejay.de"86400
CAA0 issue "comodoca.com"86400

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), MX (1m). Low TTLs are useful just before a planned change.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: letsencrypt.org, comodoca.com.