sky.de

Checked 22 October 2026, 00:10 UTC · via 8.8.8.8
!Passed with warnings
21 passed 3 warnings 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

a1-198.akam.net, a10-65.akam.net, a11-66.akam.net, a20-67.akam.net, a28-64.akam.net, a5-65.akam.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
a1-198.akam.net, a10-65.akam.net, a11-66.akam.net, a20-67.akam.net, a28-64.akam.net, a5-65.akam.net
NS in the zone
a1-198.akam.net, a10-65.akam.net, a11-66.akam.net, a20-67.akam.net, a28-64.akam.net, a5-65.akam.net
NameserverAddressesNetwork (AS)Glue
a1-198.akam.net193.108.91.198 2600:1401:2::c6AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a10-65.akam.net96.7.50.65 2600:1480:d000::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a11-66.akam.net84.53.139.66 2600:1480:1::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a20-67.akam.net95.100.175.67 2a02:26f0:67::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a28-64.akam.net95.100.173.64 2600:1480:d800::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a5-65.akam.net95.100.168.65 2600:1480:b000::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-198.akam.net, a10-65.akam.net, a11-66.akam.net, a20-67.akam.net, a28-64.akam.net, a5-65.akam.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 6 IPv4 /24s and 6 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 12 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

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-198.akam.net 193.108.91.198NOERROR, 3 ms, authoritativenoyes / yesrefused41824.8
a1-198.akam.net 2600:1401:2::c6NOERROR, 3 ms, authoritativenoyes / yesrefused41824.5
a10-65.akam.net 96.7.50.65NOERROR, 3 ms, authoritativenoyes / yesrefused48878.31
a10-65.akam.net 2600:1480:d000::41NOERROR, 4 ms, authoritativenoyes / yesrefused48878.29
a11-66.akam.net 84.53.139.66NOERROR, 3 ms, authoritativenoyes / yesrefused41824.8
a11-66.akam.net 2600:1480:1::42NOERROR, 4 ms, authoritativenoyes / yesrefused41824.9
a20-67.akam.net 95.100.175.67NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a20-67.akam.net 2a02:26f0:67::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.27
a28-64.akam.net 95.100.173.64NOERROR, 4 ms, authoritativenoyes / yesrefused48878.26
a28-64.akam.net 2600:1480:d800::40NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a5-65.akam.net 95.100.168.65NOERROR, 4 ms, authoritativenoyes / yesrefused41824.9
a5-65.akam.net 2600:1480:b000::41NOERROR, 4 ms, authoritativenoyes / yesrefused41824.8

Checks

  • ✓ All respond #14
    All 12 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: a1-198.akam.net: "41824.8"; a1-198.akam.net: "41824.5"; a10-65.akam.net: "48878.31"; a10-65.akam.net: "48878.29"; a11-66.akam.net: "41824.8"; a11-66.akam.net: "41824.9"; a20-67.akam.net: "48878.33"; a20-67.akam.net: "48878.27"; a28-64.akam.net: "48878.26"; a28-64.akam.net: "48878.33"; a5-65.akam.net: "41824.9"; a5-65.akam.net: "41824.8". 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 2018043048 · primary a1-198.akam.net

Found

Primary (MNAME)
a1-198.akam.net
Contact (RNAME)
domainadmin.sky.de
Serial
2018043048
Refresh / retry
3600 s / 1200 s
Expire
604800 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
a1-198.akam.net (193.108.91.198)2018043048
a1-198.akam.net (2600:1401:2::c6)2018043048
a10-65.akam.net (96.7.50.65)2018043048
a10-65.akam.net (2600:1480:d000::41)2018043048
a11-66.akam.net (84.53.139.66)2018043048
a11-66.akam.net (2600:1480:1::42)2018043048
a20-67.akam.net (95.100.175.67)2018043048
a20-67.akam.net (2a02:26f0:67::43)2018043048
a28-64.akam.net (95.100.173.64)2018043048
a28-64.akam.net (2600:1480:d800::40)2018043048
a5-65.akam.net (95.100.168.65)2018043048
a5-65.akam.net (2600:1480:b000::41)2018043048

Checks

  • ✓ Serial 2018043048 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 20m, expire 7d, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver a1-198.akam.net is one of the listed nameservers.
  • ✓ Contact domainadmin@sky.de #25
    The SOA RNAME domainadmin.sky.de means domainadmin@sky.de.
  • ✓ Date-based serial #26
    The serial 2018043048 follows the YYYYMMDDnn convention (2018-04-30).

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

32 records at the apex

Found

Read from
193.108.91.198:53
TypeValueTTL
SOAa1-198.akam.net. domainadmin.sky.de. 2018043048 3600 1200 604800 6003600
NSa10-65.akam.net.3600
NSa28-64.akam.net.3600
NSa5-65.akam.net.3600
NSa11-66.akam.net.3600
NSa1-198.akam.net.3600
NSa20-67.akam.net.3600
A2.16.204.15720
A2.16.204.15120
AAAA2a02:26f0:b700:5::210:cc1520
AAAA2a02:26f0:b700:5::210:cc1120
MX10 mxb-009f8f01.gslb.pphosted.com.600
MX10 mxa-009f8f01.gslb.pphosted.com.600
TXT"atlassian-domain-verification=mE2q0LJi8keyM9m/IydKu1RKVRddcE/9KRmXe1jvz/xndvKLKXoFJdk/BxpPdOsU"300
TXT"apple-domain-verification=UinuuQmBLtlg7loG"300
TXT"5JVBiMdanomZ10Qspg1evLY"300
TXT"00d0n000000gu24uae"300
TXT"v=spf1 include:spf-009f8f01.pphosted.com include:de._netblocks.mimecast.com include:spf.protection.outlook.com include:_spf.sky.de include:_spf.tivian.com include:eu.khoros-mail.com include:_spf.salesforce.com include:mcxplatform.de -all"300
TXT"ufBatIuCnrO24F3tOz78DJi/t3N5Xa06rS2yjNBXIrfQ0evFyPNgYBg2I17g+rXh9dzo5co+5p0LlOx9z3qjpA=="300
TXT"docker-verification=9b0da130-0038-49f8-bd8c-ad0da20b312f"300
TXT"adobe-idp-site-verification=91dc6bc75235173d0a27b57f9f232b4139bd460dc4c7c45be9721db9cbce4e12"300
TXT"google-site-verification=9WKpGy7-1ZwMW56vOBLIg_-x9skj7SZMdCP_dphhL6I"300
TXT"jamf-site-verification=MtZTaf9ACLfgHD5fYaF0vA"300
TXT"atlassian-domain-verification=Kl3ByU1tsfV9fKiC7TDDZYz1uCeTeUo0SSEh5SitZ9q99Ua74O571fgiIg//j5Hn"300
TXT"figma-domain-verification=9b8957b77abd0e487555d9012afcfaab58e28e9d6a2fc253c0d373f84a3423bc-1743157017"300
TXT"00d7s000000yqb6uak"300
TXT"openai-domain-verification=dv-0kjCUJ3mFAEliUDRJQN29DFW"300
TXT"cisco-ci-domain-verification=66f398dbbb368431c7ed1e6c08c394ab903c363584e6488ee26625cf525d0741"300
TXT"google-site-verification=780ibHB-1rgwRIo77GjGC8KDLO8_pEOoyZUsnYD1lYQ"300
TXT"ahrefs-site-verification_494fb196626da1fd40c18ff785662295f23c29ddc6ce27092d2548bee4edc0eb"300
TXT"m1pbcs83bc1pthy4zsjc56bhhv2wb8lw"300
TXT"MS=ms30086784"300

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (20s), AAAA (20s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 1h; resolvers may use either.
    #32
  • ✓ 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