solarwatt.de

Checked 22 October 2026, 00:22 UTC · via 8.8.8.8
!Passed with warnings
22 passed 1 warning 0 failed 6 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

ns1.seffner-schlesier.de, ns2.seffner-schlesier.de, nsv4.seffner-schlesier.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.seffner-schlesier.de, ns2.seffner-schlesier.de, nsv4.seffner-schlesier.de
NS in the zone
ns1.seffner-schlesier.de, ns2.seffner-schlesier.de, nsv4.seffner-schlesier.de
NameserverAddressesNetwork (AS)Glue
ns1.seffner-schlesier.de78.46.92.37 2a01:4f8:120:6442::2AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE78.46.92.37 2a01:4f8:120:6442::2
ns2.seffner-schlesier.de144.76.78.17 2a01:4f8:192:10::2AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE144.76.78.17 2a01:4f8:192:10::2
nsv4.seffner-schlesier.de148.251.243.123AS24940 HETZNER-AS - Hetzner Online GmbH, DE148.251.243.123

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.seffner-schlesier.de, ns2.seffner-schlesier.de, nsv4.seffner-schlesier.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 3 IPv4 /24s and 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 5 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 .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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: nsv4.seffner-schlesier.de.
    #13

Nameservers

pass

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.seffner-schlesier.de 78.46.92.37NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns1.seffner-schlesier.de 2a01:4f8:120:6442::2NOERROR, 7 ms, authoritativenoyes / yesrefused-
ns2.seffner-schlesier.de 144.76.78.17NOERROR, 2 ms, authoritativenoyes / yesrefused-
ns2.seffner-schlesier.de 2a01:4f8:192:10::2NOERROR, 3 ms, authoritativenoyes / yesrefused-
nsv4.seffner-schlesier.de 148.251.243.123NOERROR, 2 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 5 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 2026101301 · primary ns1.seffner-schlesier.de

Found

Primary (MNAME)
ns1.seffner-schlesier.de
Contact (RNAME)
info.seffner-schlesier.de
Serial
2026101301
Refresh / retry
3600 s / 900 s
Expire
1209600 s
Negative TTL
1200 s

Serial per nameserver

NameserverSerial
ns1.seffner-schlesier.de (78.46.92.37)2026101301
ns1.seffner-schlesier.de (2a01:4f8:120:6442::2)2026101301
ns2.seffner-schlesier.de (144.76.78.17)2026101301
ns2.seffner-schlesier.de (2a01:4f8:192:10::2)2026101301
nsv4.seffner-schlesier.de (148.251.243.123)2026101301

Checks

  • ✓ Serial 2026101301 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 15m, expire 14d, negative TTL 20m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.seffner-schlesier.de is one of the listed nameservers.
  • ✓ Contact info@seffner-schlesier.de #25
    The SOA RNAME info.seffner-schlesier.de means info@seffner-schlesier.de.
  • ✓ Date-based serial #26
    The serial 2026101301 follows the YYYYMMDDnn convention (2026-10-13).

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

16 records at the apex

Found

Read from
78.46.92.37:53
TypeValueTTL
SOAns1.seffner-schlesier.de. info.seffner-schlesier.de. 2026101301 3600 900 1209600 1200172800
NSns2.seffner-schlesier.de.172800
NSns1.seffner-schlesier.de.172800
NSnsv4.seffner-schlesier.de.172800
A78.46.92.37172800
MX0 solarwatt-de.mail.protection.outlook.com.3600
TXT"apple-domain-verification=IVjCOIuZ9Ga2D5PnuDohOH4GjGuPqioS4-DQ7nRH61I"3600
TXT"v=spf1 include:servers.mcsv.net include:spf1.mailchannels.net include:spf.protection.outlook.com ip4:91.26.2.150 -all"3600
TXT"google-site-verification=oH4RdIMaVipaNyoWw5TOf2N_N3LAgAFjVSHKA_D5cJw"3600
TXT"facebook-domain-verification=f3gnyc1gzvd9pvjgqrv89zqj5bw5k0"3600
TXT"MS=3F2C846B542AD4F5F98EF100BD92932C32162A17"3600
CAA0 issuewild "sectigo.com"172800
CAA0 issuewild "amazonaws.com"172800
CAA0 issue "amazonaws.com"172800
CAA0 issue "letsencrypt.org"172800
CAA0 issue "sectigo.com"172800

Checks

  • ✓ TTLs within range #32
    TTLs: A 2d, MX 1h, NS 2d. The NS TTL at the parent is 1d and in the zone 2d; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: sectigo.com, amazonaws.com, letsencrypt.org.