bgr.de

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

bzax04.bgr.de, dns-2.dfn.de, uranus.bgr.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
bzax04.bgr.de, dns-2.dfn.de, uranus.bgr.de
NS in the zone
bzax04.bgr.de, dns-2.dfn.de, uranus.bgr.de
NameserverAddressesNetwork (AS)Glue
bzax04.bgr.de193.174.160.2AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE193.174.160.2
dns-2.dfn.de193.174.75.54 2001:638:d:b102::1AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE-
uranus.bgr.de193.174.160.1AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE193.174.160.1

Checks

  • ✓ 3 nameservers #6
    Delegated to bzax04.bgr.de, dns-2.dfn.de, uranus.bgr.de.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: bzax04.bgr.de, uranus.bgr.de.
  • ✓ 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.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS680 (DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE): 4 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: bzax04.bgr.de, uranus.bgr.de.
    #13

Nameservers

info

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
bzax04.bgr.de 193.174.160.2NOERROR, 9 ms, authoritativenoyes / yesrefused-
dns-2.dfn.de 193.174.75.54NOERROR, 7 ms, authoritativenoyes / yesrefused0
dns-2.dfn.de 2001:638:d:b102::1NOERROR, 7 ms, authoritativenoyes / yesrefused0
uranus.bgr.de 193.174.160.1NOERROR, 9 ms, authoritativenoyes / yesrefused-

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: dns-2.dfn.de: "0".
    #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 2016121288 · primary uranus.bgr.de

Found

Primary (MNAME)
uranus.bgr.de
Contact (RNAME)
dns.bgr.de
Serial
2016121288
Refresh / retry
14400 s / 900 s
Expire
604800 s
Negative TTL
14400 s

Serial per nameserver

NameserverSerial
bzax04.bgr.de (193.174.160.2)2016121288
dns-2.dfn.de (193.174.75.54)2016121288
dns-2.dfn.de (2001:638:d:b102::1)2016121288
uranus.bgr.de (193.174.160.1)2016121288

Checks

  • ✓ Serial 2016121288 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 15m, expire 7d, negative TTL 4h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver uranus.bgr.de is one of the listed nameservers.
  • ✓ Contact dns@bgr.de #25
    The SOA RNAME dns.bgr.de means dns@bgr.de.
  • ✓ Date-based serial #26
    The serial 2016121288 follows the YYYYMMDDnn convention (2016-12-12).

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

11 records at the apex

Found

Read from
193.174.160.2:53
TypeValueTTL
SOAuranus.bgr.de. dns.bgr.de. 2016121288 14400 900 604800 1440014400
NSbzax04.bgr.de.14400
NSuranus.bgr.de.14400
NSdns-2.dfn.de.14400
MX10 mail01.bgr.de.14400
MX10 mail02.bgr.de.14400
TXT"v=spf1 ip4:193.174.160.0/24 include:_spf1.bund.de -all"14400
TXT"cisco-ci-domain-verification=654388c50cb732b4eeb9aaf068462881b21a3373bb3d15c793b605164d207a90"14400
TXT"HARICA-CzD2Hxk78ZsgKB6m3oB"14400
TXT"apple-domain-verification=3a3ueLUBFipurFQM"14400
TXT"MS=B709E5F786E86944A61210A964C9420547CE16F9"14400

Checks

  • ✓ TTLs within range #32
    TTLs: MX 4h, 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