deutsche-rentenversicherung-bund.de

Checked 21 October 2026, 22:13 UTC · via 8.8.8.8
!Passed with warnings
20 passed 2 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

warn

ns.drv-bund.de, ns02.versatel.de, ns03.versatel.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.drv-bund.de, ns02.versatel.de, ns03.versatel.de
NS in the zone
ns.drv-bund.de, ns02.versatel.de, ns03.versatel.de
NameserverAddressesNetwork (AS)Glue
ns.drv-bund.de217.9.49.4AS8881 VERSATEL - 1&1 Versatel GmbH, DE217.9.49.4
ns02.versatel.de212.7.128.165AS8881 VERSATEL - 1&1 Versatel GmbH, DE212.7.128.165
ns03.versatel.de193.219.15.17AS8881 VERSATEL - 1&1 Versatel GmbH, DE193.219.15.17

Checks

  • ✓ 3 nameservers #6
    Delegated to ns.drv-bund.de, ns02.versatel.de, ns03.versatel.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 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS8881 (VERSATEL - 1&1 Versatel GmbH, DE): 3 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

info

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.drv-bund.de 217.9.49.4NOERROR, 16 ms, authoritativenoyes / yesrefused-
ns02.versatel.de 212.7.128.165NOERROR, 17 ms, authoritativenoyes / yesrefusedNo version info available (refused).
ns03.versatel.de 193.219.15.17NOERROR, 11 ms, authoritativenoyes / yesrefusedNo version info available (refused).

Checks

  • ✓ All respond #14
    All 3 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: ns02.versatel.de: "No version info available (refused)."; ns03.versatel.de: "No version info available (refused).".
    #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 2020111819 · primary ibx-gm.prod.bund.drv

Found

Primary (MNAME)
ibx-gm.prod.bund.drv
Contact (RNAME)
security-info.drv-bund.de
Serial
2020111819
Refresh / retry
27000 s / 7200 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns.drv-bund.de (217.9.49.4)2020111819
ns02.versatel.de (212.7.128.165)2020111819
ns03.versatel.de (193.219.15.17)2020111819

Checks

  • ✓ Serial 2020111819 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 450m, retry 2h, expire 7d, negative TTL 1h.
  • i
    Hidden master (not resolvable)
    The primary nameserver ibx-gm.prod.bund.drv 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 security-info@drv-bund.de #25
    The SOA RNAME security-info.drv-bund.de means security-info@drv-bund.de.
  • ✓ Date-based serial #26
    The serial 2020111819 follows the YYYYMMDDnn convention (2020-11-18).

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

9 records at the apex

Found

Read from
217.9.49.4:53
TypeValueTTL
SOAibx-gm.prod.bund.drv. security-info.drv-bund.de. 2020111819 27000 7200 604800 360086400
NSns03.versatel.de.86400
NSns.drv-bund.de.86400
NSns02.versatel.de.86400
A217.9.49.2086400
MX10 mx01.drv-bund.de.86400
MX0 .86400
MX10 mx02.drv-bund.de.86400
TXT"v=spf1 -all"86400

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