devk.de

Checked 21 October 2026, 22:13 UTC · via 8.8.8.8
!Passed with warnings
19 passed 3 warnings 0 failed 7 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

ns1.fra.auth.colt.net, ns8.colt.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.fra.auth.colt.net, ns8.colt.net
NS in the zone
ns1.fra.auth.colt.net, ns8.colt.net
NameserverAddressesNetwork (AS)Glue
ns1.fra.auth.colt.net212.74.78.24AS8220 COLT - COLT Technology Services Group Limited, GB-
ns8.colt.net84.14.241.53AS8220 COLT - COLT Technology Services Group Limited, GB-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.fra.auth.colt.net, ns8.colt.net.
    #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 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS8220 (COLT - COLT Technology Services Group Limited, GB): 2 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 .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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

info

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.fra.auth.colt.net 212.74.78.24NOERROR, 4 ms, authoritativenoyes / yesrefusedColt
ns8.colt.net 84.14.241.53NOERROR, 15 ms, authoritativenoyes / yesrefusedColt

Checks

  • ✓ All respond #14
    All 2 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: ns1.fra.auth.colt.net: "Colt"; ns8.colt.net: "Colt".
    #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

warn

serial 523642433 · primary ns8.colt.net

Found

Primary (MNAME)
ns8.colt.net
Contact (RNAME)
fwadmin.devk.de
Serial
523642433
Refresh / retry
3600 s / 3600 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.fra.auth.colt.net (212.74.78.24)523642433
ns8.colt.net (84.14.241.53)523642433

Checks

  • ✓ Serial 523642433 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 1h should be shorter than refresh 1h. Current values: refresh 1h, retry 1h, expire 7d, negative TTL 1d.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns8.colt.net is one of the listed nameservers.
  • ✓ Contact fwadmin@devk.de #25
    The SOA RNAME fwadmin.devk.de means fwadmin@devk.de.
  • ✓ Counter serial #26
    The serial 523642433 is a plain counter.

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
212.74.78.24:53
TypeValueTTL
SOAns8.colt.net. fwadmin.devk.de. 523642433 3600 3600 604800 864003600
NSns1.fra.auth.colt.net.3600
NSns8.colt.net.3600
A91.238.4.1233600
MX10 devk-de.mail.protection.outlook.com.300
TXT"apple-domain-verification=Ac0YXDMwYJiJiYE6pEKFOffRaKhkHnwEk2_sJUNc1oQ"3600
TXT"google-site-verification=Q1ByX3goCNVa8Xthp9aqAaP1kIGnAuxoZJVIKSJBBvU"3600
TXT"atlassian-domain-verification=maXWdXqElAzu7qxf7bSgE58Jg9WH0hLAiVBbGYmgKHmjz6fRd5vlvthRfZ1QVT6O"3600
TXT"v=spf1 ip4:91.238.4.124 include:spf.protection.outlook.com include:_spf.zimpel.de mx ~all"3600
TXT"adobe-idp-site-verification=1a219e421123d3a594bc79dcee3fd454f9cb846eb7bc29f1f1802cb11954dc20"3600
TXT"MS=ms44608487"3600
TXT"facebook-domain-verification=acq02u8ir3egf6ldqpnwcppssnf4tq"3600
TXT"google-site-verification=jtCidUUBpAj9J9z6IJOemybnARvh6UFwucOi3l4_Cqc"3600
TXT"apple-domain-verification=JaZFMV5ZEknFHWwy"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 5m, 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.
  • ✓ 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