bamf.de

Checked 21 October 2026, 21:34 UTC · via 8.8.8.8
iAll checks passed
26 passed 0 warnings 0 failed 7 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

argon.bund.de, bamberg.bund.de, dns-1.dfn.de, nuernberg.bund.de, xenon.bund.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
argon.bund.de, bamberg.bund.de, dns-1.dfn.de, nuernberg.bund.de, xenon.bund.de
NS in the zone
argon.bund.de, bamberg.bund.de, dns-1.dfn.de, nuernberg.bund.de, xenon.bund.de
NameserverAddressesNetwork (AS)Glue
argon.bund.de77.87.224.18AS49234 BDBOS-AS3 - Bundesministerium des Innern und fuer Heimat, DE77.87.224.18
bamberg.bund.de77.87.228.36AS49234 BDBOS-AS3 - Bundesministerium des Innern und fuer Heimat, DE77.87.228.36
dns-1.dfn.de193.174.75.50 2001:638:d:b101::1AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE-
nuernberg.bund.de77.87.228.37AS49234 BDBOS-AS3 - Bundesministerium des Innern und fuer Heimat, DE77.87.228.37
xenon.bund.de77.87.224.71AS49234 BDBOS-AS3 - Bundesministerium des Innern und fuer Heimat, DE77.87.224.71

Checks

  • ✓ 5 nameservers #6
    Delegated to argon.bund.de, bamberg.bund.de, dns-1.dfn.de, nuernberg.bund.de, xenon.bund.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 1 IPv6 /48.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS49234 (BDBOS-AS3 - Bundesministerium des Innern und fuer Heimat, DE): 4 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: argon.bund.de, bamberg.bund.de, nuernberg.bund.de, xenon.bund.de.
    #13

Nameservers

info

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
argon.bund.de 77.87.224.18NOERROR, 13 ms, authoritativenoyes / yesrefusedbund
bamberg.bund.de 77.87.228.36NOERROR, 9 ms, authoritativenoyes / yesrefusedbund
dns-1.dfn.de 193.174.75.50NOERROR, 14 ms, authoritativenoyes / yesrefused0
dns-1.dfn.de 2001:638:d:b101::1NOERROR, 15 ms, authoritativenoyes / yesrefused0
nuernberg.bund.de 77.87.228.37NOERROR, 9 ms, authoritativenoyes / yesrefusedbund
xenon.bund.de 77.87.224.71NOERROR, 13 ms, authoritativenoyes / yesrefusedbund

Checks

  • ✓ All respond #14
    All 6 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: argon.bund.de: "bund"; bamberg.bund.de: "bund"; dns-1.dfn.de: "0"; nuernberg.bund.de: "bund"; xenon.bund.de: "bund".
    #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

info

serial 2026102001 · primary radium.bund.de

Found

Primary (MNAME)
radium.bund.de
Contact (RNAME)
firewall-admin.bamf.bund.de
Serial
2026102001
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
14400 s

Serial per nameserver

NameserverSerial
argon.bund.de (77.87.224.18)2026102001
bamberg.bund.de (77.87.228.36)2026102001
dns-1.dfn.de (193.174.75.50)2026102001
dns-1.dfn.de (2001:638:d:b101::1)2026102001
nuernberg.bund.de (77.87.228.37)2026102001
xenon.bund.de (77.87.224.71)2026102001

Checks

  • ✓ Serial 2026102001 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 4h.
  • i
    Hidden master (not resolvable)
    The primary nameserver radium.bund.de is not listed as a nameserver and does not resolve publicly: a hidden master, or a placeholder name. Some tools (e.g. dynamic updates) use MNAME to find the primary.
    #24
  • ✓ Contact firewall-admin@bamf.bund.de #25
    The SOA RNAME firewall-admin.bamf.bund.de means firewall-admin@bamf.bund.de.
  • ✓ Date-based serial #26
    The serial 2026102001 follows the YYYYMMDDnn convention (2026-10-20).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
0 iterations, 0-byte salt
Signatures valid until
30 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
24636ECDSAP256SHA256 (13)SHA256 02CE49E13E83B245…yes

DNSKEY in the zone

Key tagRoleAlgorithm
24636KSK (257)ECDSAP256SHA256 (13)
28583ZSK (256)ECDSAP256SHA256 (13)

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 24636 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Signatures valid until 2026-10-30 #30
    The earliest DNSKEY/SOA signature expires at 2026-10-30 05:54 UTC.
  • ✓ NSEC3 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

info

10 records at the apex

Found

Read from
77.87.224.18:53
TypeValueTTL
SOAradium.bund.de. firewall-admin.bamf.bund.de. 2026102001 10800 3600 604800 1440014400
NSdns-1.dfn.de.14400
NSbamberg.bund.de.14400
NSxenon.bund.de.14400
NSargon.bund.de.14400
NSnuernberg.bund.de.14400
A80.245.152.182600
TXT"D-TRUST=RKVJEBZ6MDZ2CITWWZXLC2N"14400
TXT"D-TRUST=99JXA8QO8TG42HOXDTQVXUW"14400
TXT"v=spf1 -all"14400

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, NS 4h. The NS TTL at the parent is 1d and in the zone 4h; resolvers may use either.
  • ✓ 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