naturstrom.de

Checked 21 October 2026, 23:31 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

nsa7.schlundtech.de, nsb7.schlundtech.de, nsc7.schlundtech.de, nsd7.schlundtech.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
nsa7.schlundtech.de, nsb7.schlundtech.de, nsc7.schlundtech.de, nsd7.schlundtech.de
NS in the zone
nsa7.schlundtech.de, nsb7.schlundtech.de, nsc7.schlundtech.de, nsd7.schlundtech.de
NameserverAddressesNetwork (AS)Glue
nsa7.schlundtech.de185.132.34.227 2607:f1c0:fe:53:185:132:34:227AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
nsb7.schlundtech.de185.132.35.227 2607:f1c0:fe:53:185:132:35:227AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
nsc7.schlundtech.de217.160.80.227 2001:8d8:fe:53:217:160:80:227AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
nsd7.schlundtech.de217.160.81.227 2001:8d8:fe:53:217:160:81:227AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-

Checks

  • ✓ 4 nameservers #6
    Delegated to nsa7.schlundtech.de, nsb7.schlundtech.de, nsc7.schlundtech.de, nsd7.schlundtech.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
nsa7.schlundtech.de 185.132.34.227NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsa7.schlundtech.de 2607:f1c0:fe:53:185:132:34:227NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsb7.schlundtech.de 185.132.35.227NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsb7.schlundtech.de 2607:f1c0:fe:53:185:132:35:227NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsc7.schlundtech.de 217.160.80.227NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsc7.schlundtech.de 2001:8d8:fe:53:217:160:80:227NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsd7.schlundtech.de 217.160.81.227NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsd7.schlundtech.de 2001:8d8:fe:53:217:160:81:227NOERROR, 10 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: nsa7.schlundtech.de: "Served by PowerDNS - https://www.powerdns.com/"; nsb7.schlundtech.de: "Served by PowerDNS - https://www.powerdns.com/"; nsc7.schlundtech.de: "Served by PowerDNS - https://www.powerdns.com/"; nsd7.schlundtech.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 2025102934 · primary nsa7.schlundtech.de

Found

Primary (MNAME)
nsa7.schlundtech.de
Contact (RNAME)
banning.ecoeco.de
Serial
2025102934
Refresh / retry
43200 s / 7200 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
nsa7.schlundtech.de (185.132.34.227)2025102934
nsa7.schlundtech.de (2607:f1c0:fe:53:185:132:34:227)2025102934
nsb7.schlundtech.de (185.132.35.227)2025102934
nsb7.schlundtech.de (2607:f1c0:fe:53:185:132:35:227)2025102934
nsc7.schlundtech.de (217.160.80.227)2025102934
nsc7.schlundtech.de (2001:8d8:fe:53:217:160:80:227)2025102934
nsd7.schlundtech.de (217.160.81.227)2025102934
nsd7.schlundtech.de (2001:8d8:fe:53:217:160:81:227)2025102934

Checks

  • ✓ Serial 2025102934 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 nsa7.schlundtech.de is one of the listed nameservers.
  • ✓ Contact banning@ecoeco.de #25
    The SOA RNAME banning.ecoeco.de means banning@ecoeco.de.
  • ✓ Date-based serial #26
    The serial 2025102934 follows the YYYYMMDDnn convention (2025-10-29).

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

15 records at the apex

Found

Read from
185.132.34.227:53
TypeValueTTL
SOAnsa7.schlundtech.de. banning.ecoeco.de. 2025102934 43200 7200 1209600 8640086400
NSnsb7.schlundtech.de.86400
NSnsc7.schlundtech.de.86400
NSnsa7.schlundtech.de.86400
NSnsd7.schlundtech.de.86400
A188.40.3.21186400
MX10 egpmg.ecoeco.de.600
MX10 duspmg.naturstrom.de.600
TXT"linkedin-site-verification=30c72895-adb6-45bb-b2c7-37f8c81d5abd"300
TXT"yahoo-verification-key=ohlPbv8ppWiGLqr/QE4QKbEG8PnrSfyv/ysiMqpiiIc="300
TXT"MS=ms79800578"300
TXT"v=spf1 a mx ip4:78.46.6.170 ip4:88.79.222.18 ip4:195.135.184.139 ip4:85.25.89.130 ip4:213.61.248.112/29 include:_spf.rexx-suite.com include:spf2.k1net.de include:spf.crsend.com include:spf.de.cancom-mase.com include:spf.protection.outlook.com include:_spf" ".zimpel.de -all"300
TXT"duo_sso_verification=uMegcYuOOflamo6K4229NmZgUoRNms3qvCnDh3Z8hJcCPPQRRbMqZm7sODBfQM6c"300
TXT"dh/qbL3Yd+ZuXWasVJPfmHCE5k6Qk2jdmv/jIpDk4u6X3IbIjXpippDFFaek463m9rzRVxUwfbdyPG70gRYObw=="300
TXT"google-site-verification=XxSaEkYkoUegXKLTOsiFKK1d3gQaiPbblALNHlPKt10"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 1d, 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