asscompact.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

info

ns0.tmt.de, ns4.tmt.de, ns5.tmt.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns0.tmt.de, ns4.tmt.de, ns5.tmt.de
NS in the zone
ns0.tmt.de, ns4.tmt.de, ns5.tmt.de
NameserverAddressesNetwork (AS)Glue
ns0.tmt.de217.145.97.43 2001:4dc8:100:3::97:43AS16316 TMT - TMT GmbH & Co. KG, DE AS16316 TMT - TMT GmbH & Co. KG, DE217.145.97.43 2001:4dc8:100:3::97:43
ns4.tmt.de217.145.99.3 2001:4dc8:100::99:3AS16316 TMT - TMT GmbH & Co. KG, DE AS16316 TMT - TMT GmbH & Co. KG, DE-
ns5.tmt.de88.209.63.250 2001:4dc8:100:0:216:3eff:fec6:3095AS16316 TMT - TMT GmbH & Co. KG, DE AS16316 TMT - TMT GmbH & Co. KG, DE88.209.63.250 2001:4dc8:100:0:216:3eff:fec6:3095

Checks

  • ✓ 3 nameservers #6
    Delegated to ns0.tmt.de, ns4.tmt.de, ns5.tmt.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.
  • i
    One address family in one network
    all IPv6 addresses are in 2001:4dc8:100::/48, while the other address family is spread over several networks.
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16316 (TMT - TMT GmbH & Co. KG, DE): 6 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • 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

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns0.tmt.de 217.145.97.43NOERROR, 14 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
ns0.tmt.de 2001:4dc8:100:3::97:43NOERROR, 14 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
ns4.tmt.de 217.145.99.3NOERROR, 14 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
ns4.tmt.de 2001:4dc8:100::99:3NOERROR, 15 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
ns5.tmt.de 88.209.63.250NOERROR, 16 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
ns5.tmt.de 2001:4dc8:100:0:216:3eff:fec6:3095NOERROR, 15 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns0.tmt.de: "9.18.49-1~deb12u2-Debian"; ns4.tmt.de: "9.18.49-1~deb12u2-Debian"; ns5.tmt.de: "9.18.49-1~deb12u2-Debian". 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 2026022651 · primary ns0.tmt.de

Found

Primary (MNAME)
ns0.tmt.de
Contact (RNAME)
hostmaster.ns0.tmt.de
Serial
2026022651
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns0.tmt.de (217.145.97.43)2026022651
ns0.tmt.de (2001:4dc8:100:3::97:43)2026022651
ns4.tmt.de (217.145.99.3)2026022651
ns4.tmt.de (2001:4dc8:100::99:3)2026022651
ns5.tmt.de (88.209.63.250)2026022651
ns5.tmt.de (2001:4dc8:100:0:216:3eff:fec6:3095)2026022651

Checks

  • ✓ Serial 2026022651 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 ns0.tmt.de is one of the listed nameservers.
  • ✓ Contact hostmaster@ns0.tmt.de #25
    The SOA RNAME hostmaster.ns0.tmt.de means hostmaster@ns0.tmt.de.
  • ✓ Date-based serial #26
    The serial 2026022651 follows the YYYYMMDDnn convention (2026-02-26).

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
217.145.97.43:53
TypeValueTTL
SOAns0.tmt.de. hostmaster.ns0.tmt.de. 2026022651 28800 7200 604800 8640086400
NSns0.tmt.de.86400
NSns4.tmt.de.86400
NSns5.tmt.de.86400
A217.145.105.11086400
MX5 ALT1.ASPMX.L.GOOGLE.COM.86400
MX10 ASPMX2.GOOGLEMAIL.COM.86400
MX1 ASPMX.L.GOOGLE.COM.86400
MX5 ALT2.ASPMX.L.GOOGLE.COM.86400
TXT"v=spf1 a mx ip4:217.145.107.74 ip4:217.145.105.112 ip4:91.228.144.23 ip4:91.228.144.40 include:spf.nl2go.com include:_spf.google.com ~all"3600
TXT"brevo-code:e37155bc158912a3f3ba3c6f04662026"3600
TXT"google-site-verification=0jeNmsdyrpSYH7VGaXhnbsAo_gWWWoE9WPf-oeaViB4"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1d, MX 1d, 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