Domain report: ofdb.de

Registration

info

.de country-code

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.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.
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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

warn

pri-h2016.nbgo.de, sec-dns01.nbgo.de

Nameserver	Addresses	Network (AS)	Glue
pri-h2016.nbgo.de	185.146.238.83 2a02:420:0:8::1600	AS38927 NETBUILD-AS - Net-Build GmbH, DE AS38927 NETBUILD-AS - Net-Build GmbH, DE	-
sec-dns01.nbgo.de	185.146.238.254 2a02:420:0:10::2	AS38927 NETBUILD-AS - Net-Build GmbH, DE AS38927 NETBUILD-AS - Net-Build GmbH, DE	-

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2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: pri-h2016.nbgo.de, sec-dns01.nbgo.de.

#6
✓ 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 one network

all IPv4 addresses are in 185.146.238.0/24; all IPv6 addresses are in 2a02:420::/48. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).

#10
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All nameservers in one AS

All nameserver addresses are announced by one network operator (AS38927 (NETBUILD-AS - Net-Build GmbH, 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
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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
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

warn

4 of 4 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
pri-h2016.nbgo.de 185.146.238.83	NOERROR, 8 ms, authoritative	no	yes / yes	refused	none
pri-h2016.nbgo.de 2a02:420:0:8::1600	NOERROR, 8 ms, authoritative	no	yes / yes	refused	none
sec-dns01.nbgo.de 185.146.238.254	NOERROR, 9 ms, authoritative	no	yes / yes	refused	9.16.23-RH
sec-dns01.nbgo.de 2a02:420:0:10::2	NOERROR, 8 ms, authoritative	no	yes / yes	refused	9.16.23-RH

✓ 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: sec-dns01.nbgo.de: "9.16.23-RH". 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.

pass

serial 2026091802 · primary pri-h2016.nbgo.de

✓ Serial 2026091802 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 3h, retry 1h, expire 14d, negative TTL 3h.
✓ Primary is a public nameserver #24

The primary nameserver pri-h2016.nbgo.de is one of the listed nameservers.
✓ Contact admin@ofdb.de #25

The SOA RNAME admin.ofdb.de means admin@ofdb.de.
✓ Date-based serial #26

The serial 2026091802 follows the YYYYMMDDnn convention (2026-09-18).

warn

Not signed

info

8 records at the apex

Type	Value	TTL
SOA	pri-h2016.nbgo.de. admin.ofdb.de. 2026091802 10800 3600 1209600 10800	86400
NS	pri-h2016.nbgo.de.	86400
NS	sec-dns01.nbgo.de.	86400
A	185.146.238.83	86400
AAAA	2a02:420:0:8::1600	86400
MX	10 mail.ofdb.de.	86400
TXT	"google-site-verification=IOyRupMa7rvqdwFo-OxXgxJ6tkAt_bffJgxtvMUGtrU"	86400
TXT	"v=spf1 +a +mx +a:hosting2016.nbgo.de +a:87.237.120.142 ~all"	86400