check24.de

Checked 21 October 2026, 22:06 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

ns10.digicertdns.com, ns11.digicertdns.com, ns12.digicertdns.com, ns13.digicertdns.net, ns14.digicertdns.net, ns15.digicertdns.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns10.digicertdns.com, ns11.digicertdns.com, ns12.digicertdns.com, ns13.digicertdns.net, ns14.digicertdns.net, ns15.digicertdns.net
NS in the zone
ns10.digicertdns.com, ns11.digicertdns.com, ns12.digicertdns.com, ns13.digicertdns.net, ns14.digicertdns.net, ns15.digicertdns.net
NameserverAddressesNetwork (AS)Glue
ns10.digicertdns.com208.94.148.159 2600:1800::1:1fAS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns11.digicertdns.com208.80.124.159 2600:1801:1::1:1fAS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns12.digicertdns.com208.80.126.159 2600:1802:2::1:1fAS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns13.digicertdns.net208.80.125.159 2600:1801:3::1:1fAS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns14.digicertdns.net208.80.127.159 2600:1802:4::1:1fAS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns15.digicertdns.net208.94.149.159 2600:1800:8::1:1fAS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-

Checks

  • ✓ 6 nameservers #6
    Delegated to ns10.digicertdns.com, ns11.digicertdns.com, ns12.digicertdns.com, ns13.digicertdns.net, ns14.digicertdns.net, ns15.digicertdns.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 (AS16552 (DIGICERT - Tiggee LLC, US): 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
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .net.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns10.digicertdns.com 208.94.148.159NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns10.digicertdns.com 2600:1800::1:1fNOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns11.digicertdns.com 208.80.124.159NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns11.digicertdns.com 2600:1801:1::1:1fNOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns12.digicertdns.com 208.80.126.159NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns12.digicertdns.com 2600:1802:2::1:1fNOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns13.digicertdns.net 208.80.125.159NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns13.digicertdns.net 2600:1801:3::1:1fNOERROR, 5 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns14.digicertdns.net 208.80.127.159NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns14.digicertdns.net 2600:1802:4::1:1fNOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns15.digicertdns.net 208.94.149.159NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns15.digicertdns.net 2600:1800:8::1:1fNOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns10.digicertdns.com: "DNS Made Easy Anycast"; ns11.digicertdns.com: "DNS Made Easy Anycast"; ns12.digicertdns.com: "DNS Made Easy Anycast"; ns13.digicertdns.net: "DNS Made Easy Anycast"; ns14.digicertdns.net: "DNS Made Easy Anycast"; ns15.digicertdns.net: "DNS Made Easy Anycast".
    #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 2009013284 · primary ns10.digicertdns.com

Found

Primary (MNAME)
ns10.digicertdns.com
Contact (RNAME)
dns.digicertdns.com
Serial
2009013284
Refresh / retry
43200 s / 3600 s
Expire
1209600 s
Negative TTL
180 s

Serial per nameserver

NameserverSerial
ns10.digicertdns.com (208.94.148.159)2009013284
ns10.digicertdns.com (2600:1800::1:1f)2009013284
ns11.digicertdns.com (208.80.124.159)2009013284
ns11.digicertdns.com (2600:1801:1::1:1f)2009013284
ns12.digicertdns.com (208.80.126.159)2009013284
ns12.digicertdns.com (2600:1802:2::1:1f)2009013284
ns13.digicertdns.net (208.80.125.159)2009013284
ns13.digicertdns.net (2600:1801:3::1:1f)2009013284
ns14.digicertdns.net (208.80.127.159)2009013284
ns14.digicertdns.net (2600:1802:4::1:1f)2009013284
ns15.digicertdns.net (208.94.149.159)2009013284
ns15.digicertdns.net (2600:1800:8::1:1f)2009013284

Checks

  • ✓ Serial 2009013284 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 3m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 12h, retry 1h, expire 14d, negative TTL 3m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns10.digicertdns.com is one of the listed nameservers.
  • ✓ Contact dns@digicertdns.com #25
    The SOA RNAME dns.digicertdns.com means dns@digicertdns.com.
  • ✓ Timestamp serial #26
    The serial 2009013284 is a Unix timestamp (2033-08-30 11:14 UTC).

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

29 records at the apex

Found

Read from
208.94.148.159:53
TypeValueTTL
SOAns10.digicertdns.com. dns.digicertdns.com. 2009013284 43200 3600 1209600 18086400
NSns11.digicertdns.com.86400
NSns15.digicertdns.net.86400
NSns10.digicertdns.com.86400
NSns14.digicertdns.net.86400
NSns12.digicertdns.com.86400
NSns13.digicertdns.net.86400
A195.30.64.160
A195.30.64.260
A89.191.81.1160
A89.191.81.1260
MX10 mxa-00813e01.gslb.pphosted.com.600
MX10 mxb-00813e01.gslb.pphosted.com.600
TXT"openai-domain-verification=dv-d0IZTNsDutKs9pht1Vdtjk6I"60
TXT"slack-domain-verification=OqtBixIVsNYIpcVKaJlY8LkazsEMOluENRyLQZWU"60
TXT"_3xcu3un2ixurv57xxaaukjg0mvx0gn0"60
TXT"cursor-domain-verification-njya7n=8PnWHtUyX7hFH2vExQz1FHRKq"60
TXT"apple-domain-verification=YJZCa9iEqQkAfo7vyOEmwoPcxfjPE8JjglWpXbS5hoY"60
TXT"google-site-verification=YEwIKzQX2pS_bx_DJ1k60FYkbXkb1lMHcc3rmtFSjvc"60
TXT"atlassian-domain-verification=5QoHtArGBL2XVj5/3EQQVyNMW5a5rECow4BoIRKdIVSFmuuVSWbvpb7QjANEB4/m"60
TXT"v=spf1 include:_spf.check24.de ~all"60
TXT"jamf-site-verification=CdUolvf10zSjIDFFF-ENeA"60
TXT"hibp-verify=dweb_h8cn8ejmwzltbm971b42v2mh"60
TXT"anthropic-domain-verification-etqme0=W3n2cZ9op4rOKaR45TAElDGUe"60
TXT"docusign=fa1b2ae2-3a49-4154-9f67-01df6fef12db"60
TXT"twilio-domain-verification=b9b9316de1fe27b10e66c96eacd24b9b"60
TXT"slack-domain-verification=JgtO2brTMNhPGQ7LEbE75LFhXLp7LltT0X4p4LEH"60
TXT"google-site-verification=PQvzj243gIdtJoSOLjwpChkTa1hdQsMOyX87IieMWjc"60
TXT"apple-domain-verification=drci8dxi8PJDuXEKkYxQJLWCR_SFB1O5T6GaRlx37zw"60

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (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.
  • 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