golem.de

Checked 21 October 2026, 22:40 UTC · via 8.8.8.8
!Passed with warnings
23 passed 1 warning 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

ns01.syseleven.de, ns02.syseleven.de, ns03.syseleven.de, ns04.syseleven.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns01.syseleven.de, ns02.syseleven.de, ns03.syseleven.de, ns04.syseleven.de
NS in the zone
ns01.syseleven.de, ns02.syseleven.de, ns03.syseleven.de, ns04.syseleven.de
NameserverAddressesNetwork (AS)Glue
ns01.syseleven.de217.160.80.161 2001:8d8:fe:53:217:160:80:161AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE217.160.80.161 2001:8d8:fe:53:217:160:80:161
ns02.syseleven.de217.160.81.161 2001:8d8:fe:53:217:160:81:161AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE217.160.81.161 2001:8d8:fe:53:217:160:81:161
ns03.syseleven.de185.132.35.161 2607:f1c0:fe:53:185:132:35:161AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB185.132.35.161 2607:f1c0:fe:53:185:132:35:161
ns04.syseleven.de185.132.34.161 2607:f1c0:fe:53:185:132:34:161AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB185.132.34.161 2607:f1c0:fe:53:185:132:34:161

Checks

  • ✓ 4 nameservers #6
    Delegated to ns01.syseleven.de, ns02.syseleven.de, ns03.syseleven.de, ns04.syseleven.de.
  • ✓ 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 4 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 4 addresses; AS8560 (IONOS-AS - IONOS SE, DE): 4 addresses.
  • i
    All nameserver names under .de
    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

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns01.syseleven.de 217.160.80.161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns01.syseleven.de 2001:8d8:fe:53:217:160:80:161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns02.syseleven.de 217.160.81.161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns02.syseleven.de 2001:8d8:fe:53:217:160:81:161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns03.syseleven.de 185.132.35.161NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns03.syseleven.de 2607:f1c0:fe:53:185:132:35:161NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns04.syseleven.de 185.132.34.161NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns04.syseleven.de 2607:f1c0:fe:53:185:132:34:161NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/

Checks

  • ✓ All respond #14
    All 8 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: ns01.syseleven.de: "Served by PowerDNS - https://www.powerdns.com/"; ns02.syseleven.de: "Served by PowerDNS - https://www.powerdns.com/"; ns03.syseleven.de: "Served by PowerDNS - https://www.powerdns.com/"; ns04.syseleven.de: "Served by PowerDNS - https://www.powerdns.com/".
    #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 2026011335 · primary ns01.syseleven.de

Found

Primary (MNAME)
ns01.syseleven.de
Contact (RNAME)
admin.syseleven.de
Serial
2026011335
Refresh / retry
43200 s / 7200 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns01.syseleven.de (217.160.80.161)2026011335
ns01.syseleven.de (2001:8d8:fe:53:217:160:80:161)2026011335
ns02.syseleven.de (217.160.81.161)2026011335
ns02.syseleven.de (2001:8d8:fe:53:217:160:81:161)2026011335
ns03.syseleven.de (185.132.35.161)2026011335
ns03.syseleven.de (2607:f1c0:fe:53:185:132:35:161)2026011335
ns04.syseleven.de (185.132.34.161)2026011335
ns04.syseleven.de (2607:f1c0:fe:53:185:132:34:161)2026011335

Checks

  • ✓ Serial 2026011335 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 2h, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns01.syseleven.de is one of the listed nameservers.
  • ✓ Contact admin@syseleven.de #25
    The SOA RNAME admin.syseleven.de means admin@syseleven.de.
  • ✓ Date-based serial #26
    The serial 2026011335 follows the YYYYMMDDnn convention (2026-01-13).

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

18 records at the apex

Found

Read from
217.160.80.161:53
TypeValueTTL
SOAns01.syseleven.de. admin.syseleven.de. 2026011335 43200 7200 1209600 8640086400
NSns02.syseleven.de.86400
NSns04.syseleven.de.86400
NSns03.syseleven.de.86400
NSns01.syseleven.de.86400
A77.247.84.129600
AAAA2a00:13c8:f5::f:4b3d:14886400
MX10 golem-de.mail.protection.outlook.com.3600
TXT"google-site-verification=KmHYftRRSebpdfmwpmafDBb2ELj0ws7QexueFxL_wjk"600
TXT"openai-domain-verification=dv-Z6nVxvSSGYgGaXRy6gpYO3AZ"600
TXT"MS=ms18431984"600
TXT"v=spf1 mx ip4:176.74.59.0/24 ip4:217.92.47.108 ip4:37.123.109.247 ip4:37.49.159.42 include:spf.nl2go.com include:spf.protection.outlook.com include:_spf.mailgun.org include:_spf.eu.mailgun.org ~all"600
TXT"amazonses:Ic+XRucPH5ALW2hkrBJX8DMn9Fv/dV1ZZEHZuL3hf3Q="600
TXT"brevo-code:0ac55cd98d87cec34c66d7eb881d56e0"600
TXT"google-site-verification=DCizdjgG41vs-LfgrJgxAmFOI2yj9P8AiN_sQR1Yd_w"600
TXT"atlassian-domain-verification=cQUIOe8hW6yNudUwjkJedocZb4G5a/OGPj4ow15Zxi6T9gID71f8wwQhv26GQO0c"600
TXT"google-site-verification=NYiBavW3CzXq_9CN4JS2-9ZVq1CAt8JGkH18usv2HY0"600
TXT"google-site-verification=bW6sIv8blPCQxUCXt-y4yHr8NOqri7V0EWMxZ_Hmy34"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, AAAA 1d, MX 1h, 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