testsieger.de

Checked 22 October 2026, 00:40 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

ns11.constellix.com, ns21.constellix.com, ns31.constellix.com, ns41.constellix.net, ns51.constellix.net, ns61.constellix.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns11.constellix.com, ns21.constellix.com, ns31.constellix.com, ns41.constellix.net, ns51.constellix.net, ns61.constellix.net
NS in the zone
ns11.constellix.com, ns21.constellix.com, ns31.constellix.com, ns41.constellix.net, ns51.constellix.net, ns61.constellix.net
NameserverAddressesNetwork (AS)Glue
ns11.constellix.com96.45.80.1 2600:180a:1001::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns21.constellix.com46.31.236.1 2600:180b:2001::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns31.constellix.com43.247.170.1 2600:180c:3001::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns41.constellix.net96.45.81.1 2600:180a:4001::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns51.constellix.net46.31.237.1 2600:180b:5001::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns61.constellix.net43.247.171.1 2600:180c:6001::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-

Checks

  • ✓ 6 nameservers #6
    Delegated to ns11.constellix.com, ns21.constellix.com, ns31.constellix.com, ns41.constellix.net, ns51.constellix.net, ns61.constellix.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
ns11.constellix.com 96.45.80.1NOERROR, 3 ms, authoritativenoyes / yesrefused179812
ns11.constellix.com 2600:180a:1001::1NOERROR, 4 ms, authoritativenoyes / yesrefused179812
ns21.constellix.com 46.31.236.1NOERROR, 3 ms, authoritativenoyes / yesrefused105986
ns21.constellix.com 2600:180b:2001::1NOERROR, 4 ms, authoritativenoyes / yesrefused105986
ns31.constellix.com 43.247.170.1NOERROR, 3 ms, authoritativenoyes / yesrefused808515
ns31.constellix.com 2600:180c:3001::1NOERROR, 3 ms, authoritativenoyes / yesrefused808515
ns41.constellix.net 96.45.81.1NOERROR, 3 ms, authoritativenoyes / yesrefused179812
ns41.constellix.net 2600:180a:4001::1NOERROR, 4 ms, authoritativenoyes / yesrefused179812
ns51.constellix.net 46.31.237.1NOERROR, 3 ms, authoritativenoyes / yesrefused105986
ns51.constellix.net 2600:180b:5001::1NOERROR, 4 ms, authoritativenoyes / yesrefused105986
ns61.constellix.net 43.247.171.1NOERROR, 3 ms, authoritativenoyes / yesrefused808515
ns61.constellix.net 2600:180c:6001::1NOERROR, 3 ms, authoritativenoyes / yesrefused808515

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: ns11.constellix.com: "179812"; ns21.constellix.com: "105986"; ns31.constellix.com: "808515"; ns41.constellix.net: "179812"; ns51.constellix.net: "105986"; ns61.constellix.net: "808515".
    #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 2015010162 · primary ns11.constellix.com

Found

Primary (MNAME)
ns11.constellix.com
Contact (RNAME)
dns.constellix.com
Serial
2015010162
Refresh / retry
43200 s / 3600 s
Expire
1209600 s
Negative TTL
180 s

Serial per nameserver

NameserverSerial
ns11.constellix.com (96.45.80.1)2015010162
ns11.constellix.com (2600:180a:1001::1)2015010162
ns21.constellix.com (46.31.236.1)2015010162
ns21.constellix.com (2600:180b:2001::1)2015010162
ns31.constellix.com (43.247.170.1)2015010162
ns31.constellix.com (2600:180c:3001::1)2015010162
ns41.constellix.net (96.45.81.1)2015010162
ns41.constellix.net (2600:180a:4001::1)2015010162
ns51.constellix.net (46.31.237.1)2015010162
ns51.constellix.net (2600:180b:5001::1)2015010162
ns61.constellix.net (43.247.171.1)2015010162
ns61.constellix.net (2600:180c:6001::1)2015010162

Checks

  • ✓ Serial 2015010162 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 ns11.constellix.com is one of the listed nameservers.
  • ✓ Contact dns@constellix.com #25
    The SOA RNAME dns.constellix.com means dns@constellix.com.
  • ✓ Date-based serial #26
    The serial 2015010162 follows the YYYYMMDDnn convention (2015-01-01).

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

16 records at the apex

Found

Read from
96.45.80.1:53
TypeValueTTL
SOAns11.constellix.com. dns.constellix.com. 2015010162 43200 3600 1209600 18086400
NSns41.constellix.net.86400
NSns51.constellix.net.86400
NSns61.constellix.net.86400
NSns11.constellix.com.86400
NSns21.constellix.com.86400
NSns31.constellix.com.86400
A46.253.18.171800
MX10 testsieger-de.mail.protection.outlook.com.180
TXT"v=spf1 include:spf.protection.outlook.com a:mx.testsieger.de -all"180
TXT"MS=ms51312191"180
TXT"google-gws-recovery-domain-verification=50605442"180
TXT"brevo-code:a4b6726807a4ddad74aa2dc3198cef4a"180
TXT"atlassian-domain-verification=DmLHKcWGwkPyhCkSxLgJEHCJ/haI94uBIUcYw3RMCq20JzW8PZO2fQcp3hZuvuxw"180
TXT"slack-domain-verification=6fAydgKgYEI30MSDAljPqs8v9wCNETqFVnbcbJsy"180
TXT"1password-site-verification=YQ56XKXAAREVPN3SOGQQF7NBLM"180

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: MX (3m). 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