imd-berlin.de

Checked 21 October 2026, 22:52 UTC · via 8.8.8.8
!Passed with warnings
21 passed 1 warning 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

info

dns1.cscdns.net, dns2.cscdns.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns1.cscdns.net, dns2.cscdns.net
NS in the zone
dns1.cscdns.net, dns2.cscdns.net
NameserverAddressesNetwork (AS)Glue
dns1.cscdns.net156.154.130.100 2610:a1:1022::100AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
dns2.cscdns.net156.154.131.100 2610:a1:1023::100AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns1.cscdns.net, dns2.cscdns.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 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS12008 (VERCARA - Vercara, LLC, US): 4 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.cscdns.net 156.154.130.100NOERROR, 27 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
dns1.cscdns.net 2610:a1:1022::100NOERROR, 13 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
dns2.cscdns.net 156.154.131.100NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
dns2.cscdns.net 2610:a1:1023::100NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: dns1.cscdns.net: "UltraDNS Nameserver"; dns2.cscdns.net: "UltraDNS Nameserver".
    #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 2025082810 · primary dns1.cscdns.net

Found

Primary (MNAME)
dns1.cscdns.net
Contact (RNAME)
hostmaster.cscdns.net
Serial
2025082810
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
dns1.cscdns.net (156.154.130.100)2025082810
dns1.cscdns.net (2610:a1:1022::100)2025082810
dns2.cscdns.net (156.154.131.100)2025082810
dns2.cscdns.net (2610:a1:1023::100)2025082810

Checks

  • ✓ Serial 2025082810 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 dns1.cscdns.net is one of the listed nameservers.
  • ✓ Contact hostmaster@cscdns.net #25
    The SOA RNAME hostmaster.cscdns.net means hostmaster@cscdns.net.
  • ✓ Date-based serial #26
    The serial 2025082810 follows the YYYYMMDDnn convention (2025-08-28).

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

10 records at the apex

Found

Read from
156.154.130.100:53
TypeValueTTL
SOAdns1.cscdns.net. hostmaster.cscdns.net. 2025082810 28800 7200 604800 8640086400
NSdns1.cscdns.net.86400
NSdns2.cscdns.net.86400
A35.157.26.13600
A18.153.162.82600
MX10 mx.emea.email.fireeyecloud.com.600
TXT"MS=ms69086173"600
TXT"761l6d59166ocjap5tn4o7ev39"600
TXT"atlassian-domain-verification=14izEn8/vccusUjuLuCcnA2MYUDIk3qUlUT6dQwL1rhftXDu4h/jamD6rpywUM4y"600
TXT"v=spf1 ip4:80.149.206.202 ip4:37.148.204.146 include:_spf.medicover.com include:spf.protection.outlook.com include:_spf.fireeyecloud.com include:spf.DE.exclaimer.net include:spf.de.umantis.com include:_spf.salesforce.com include:secureserver.net -all"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 10m, 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