frankfurt-oder.de

Checked 21 October 2026, 22:31 UTC · via 8.8.8.8
!Passed with warnings
26 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.brandenburg.de, ns4.variomedia.de, pns.brandenburg.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.brandenburg.de, ns4.variomedia.de, pns.brandenburg.de
NS in the zone
ns1.brandenburg.de, ns4.variomedia.de, pns.brandenburg.de
NameserverAddressesNetwork (AS)Glue
ns1.brandenburg.de194.76.232.165AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE194.76.232.165
ns4.variomedia.de81.28.232.230 2a00:1c38::4:53AS29014 SCALEUP - ScaleUp Technologies GmbH & Co. KG, DE AS29014 SCALEUP - ScaleUp Technologies GmbH & Co. KG, DE-
pns.brandenburg.de194.76.232.129AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE194.76.232.129

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.brandenburg.de, ns4.variomedia.de, pns.brandenburg.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 2 IPv4 /24s and 1 IPv6 /48.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS29014 (SCALEUP - ScaleUp Technologies GmbH & Co. KG, DE): 2 addresses; AS680 (DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE): 2 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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns1.brandenburg.de, pns.brandenburg.de.
    #13

Nameservers

warn

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.brandenburg.de 194.76.232.165NOERROR, 13 ms, authoritativenoyes / yesrefusedPublic DNS server v28.3.2. Keep your hands off!
ns4.variomedia.de 81.28.232.230NOERROR, 16 ms, authoritativenoyes / yesrefusedBIND
ns4.variomedia.de 2a00:1c38::4:53NOERROR, 17 ms, authoritativenoyes / yesrefusedBIND
pns.brandenburg.de 194.76.232.129NOERROR, 13 ms, authoritativenoyes / yesrefusedPublic DNS server v28.3.2. Keep your hands off!

Checks

  • ✓ All respond #14
    All 4 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.brandenburg.de: "Public DNS server v28.3.2. Keep your hands off!"; pns.brandenburg.de: "Public DNS server v28.3.2. Keep your hands off!". Hide or replace the version string.
    #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 2026090356 · primary pns.brandenburg.de

Found

Primary (MNAME)
pns.brandenburg.de
Contact (RNAME)
root.pns.brandenburg.de
Serial
2026090356
Refresh / retry
10800 s / 3600 s
Expire
864000 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.brandenburg.de (194.76.232.165)2026090356
ns4.variomedia.de (81.28.232.230)2026090356
ns4.variomedia.de (2a00:1c38::4:53)2026090356
pns.brandenburg.de (194.76.232.129)2026090356

Checks

  • ✓ Serial 2026090356 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 10d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver pns.brandenburg.de is one of the listed nameservers.
  • ✓ Contact root@pns.brandenburg.de #25
    The SOA RNAME root.pns.brandenburg.de means root@pns.brandenburg.de.
  • ✓ Date-based serial #26
    The serial 2026090356 follows the YYYYMMDDnn convention (2026-09-03).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
13 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
40021RSASHA256 (8)SHA256 FDEE7492E49924E5…yes

DNSKEY in the zone

Key tagRoleAlgorithm
40021KSK (257)RSASHA256 (8)
199ZSK (256)RSASHA256 (8)

Checks

  • ✓ Signed and validated #27
    The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
  • ✓ DS matches a key #28
    The DS record at the parent matches a key in the zone: key tag 40021 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: RSASHA256 (8).
  • ✓ Signatures valid until 2026-11-13 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-13 00:00 UTC.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

info

10 records at the apex

Found

Read from
194.76.232.165:53
TypeValueTTL
SOApns.brandenburg.de. root.pns.brandenburg.de. 2026090356 10800 3600 864000 8640086400
NSpns.brandenburg.de.86400
NSns1.brandenburg.de.86400
NSns4.variomedia.de.86400
A213.178.84.16886400
MX10 pmmx-hea-p02.brandenburg.de.86400
MX10 pmmx-hea-p01.brandenburg.de.86400
TXT"apple-domain-verification=9a5wDwD1ZweKZwSC"3600
TXT"MS=7DF6FF2E59822E3C0F7773A8DB7CB19996583D34"3600
TXT"v=spf1 mx ip4:213.178.85.11 ip4:194.76.232.119 ip4:194.76.232.120 ip4:194.76.232.208 ip4:194.76.232.217 ip4:194.76.232.222 ip4:194.76.232.223 ip4:194.76.232.224 include:spf.itebo.de ip4:80.158.29.159 ip4:80.158.29.232 ip4:80.158.29.229 ~all"3600

Checks

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