Domain report: wissenschaftsjahr.de

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

ns1.pp-dns.com, ns2.pp-dns.com, ns3.pp-dns.com, ns4.pp-dns.com

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: ns1.pp-dns.com, ns2.pp-dns.com, ns3.pp-dns.com, ns4.pp-dns.com
NS in the zone: ns1.pp-dns.com, ns2.pp-dns.com, ns3.pp-dns.com, ns4.pp-dns.com

Nameserver	Addresses	Network (AS)	Glue
ns1.pp-dns.com	93.188.110.60	AS33811 PIXELPARK-AS - Digitas GmbH, DE	-
ns2.pp-dns.com	18.221.66.87	AS16509 AMAZON-02 - Amazon.com, Inc., US	-
ns3.pp-dns.com	35.156.14.171	AS16509 AMAZON-02 - Amazon.com, Inc., US	-
ns4.pp-dns.com	77.74.232.21	AS33811 PIXELPARK-AS - Digitas GmbH, DE	-

Checks

✓ 4 nameservers #6

Delegated to ns1.pp-dns.com, ns2.pp-dns.com, ns3.pp-dns.com, ns4.pp-dns.com.
✓ 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 4 IPv4 /24s and 0 IPv6 /48s.
✓ 2 autonomous systems #11

The nameservers are spread over: AS16509 (AMAZON-02 - Amazon.com, Inc., US): 2 addresses; AS33811 (PIXELPARK-AS - Digitas GmbH, DE): 2 addresses.
i

All nameserver names under .com

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

4 of 4 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.pp-dns.com 93.188.110.60	NOERROR, 9 ms, authoritative	no	yes / yes	refused	none
ns2.pp-dns.com 18.221.66.87	NOERROR, 109 ms, authoritative	no	yes / yes	refused	none
ns3.pp-dns.com 35.156.14.171	NOERROR, 4 ms, authoritative	no	yes / yes	refused	none
ns4.pp-dns.com 77.74.232.21	NOERROR, 10 ms, authoritative	no	yes / yes	refused	none

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: ns1.pp-dns.com: "none"; ns2.pp-dns.com: "none"; ns3.pp-dns.com: "none"; ns4.pp-dns.com: "none".

#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 2026102201 · primary ns1.pp-dns.com

Found

Primary (MNAME): ns1.pp-dns.com
Contact (RNAME): hostmaster.pixelpark.com
Serial: 2026102201
Refresh / retry: 10800 s / 3600 s
Expire: 604800 s
Negative TTL: 3600 s

Serial per nameserver

Nameserver	Serial
ns1.pp-dns.com (93.188.110.60)	2026102201
ns2.pp-dns.com (18.221.66.87)	2026102201
ns3.pp-dns.com (35.156.14.171)	2026102201
ns4.pp-dns.com (77.74.232.21)	2026102201

Checks

✓ Serial 2026102201 everywhere #22

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

SOA refresh 3h, retry 1h, expire 7d, negative TTL 1h.
✓ Primary is a public nameserver #24

The primary nameserver ns1.pp-dns.com is one of the listed nameservers.
✓ Contact hostmaster@pixelpark.com #25

The SOA RNAME hostmaster.pixelpark.com means hostmaster@pixelpark.com.
✓ Date-based serial #26

The serial 2026102201 follows the YYYYMMDDnn convention (2026-10-22).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 0 iterations, 1-byte salt
Signatures valid until: 5 November 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
52509	ECDSAP256SHA256 (13)	SHA256 8CD6F1380890DB0D…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
52509	KSK (257)	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 52509 (SHA256).
✓ Modern algorithms #29

Key algorithms: ECDSAP256SHA256 (13).
✓ Signatures valid until 2026-11-05 #30

The earliest DNSKEY/SOA signature expires at 2026-11-05 00:00 UTC.
!

NSEC3 with extra iterations or salt

NSEC3 uses 0 iterations and a 1-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.

#31

Records

pass

15 records at the apex

Found

Read from: 93.188.110.60:53

Type	Value	TTL
SOA	ns1.pp-dns.com. hostmaster.pixelpark.com. 2026102201 10800 3600 604800 3600	300
NS	ns3.pp-dns.com.	3600
NS	ns4.pp-dns.com.	3600
NS	ns1.pp-dns.com.	3600
NS	ns2.pp-dns.com.	3600
A	77.74.235.194	300
MX	10 mx.bmbfcluster.de.	3600
MX	90 mx2.bmbfcluster.de.	3600
TXT	"6bjqk9c1mf3z7hzr6s2j658sm0dxbmsg"	300
TXT	"google-site-verification=Tjht4UYC6MkU-p_jRttgVZahrI4LZ9AcX12rsgnNf-U"	300
TXT	"_u0k1hg01siesn326ir0chf92h1pgvhd"	300
TXT	"v=spf1 a mx include:spf.crsend.com include:_spf.zimpel.de ~all"	300
CAA	0 issue "digicert.com"	300
CAA	0 issue "www.digicert.com"	300
CAA	0 issue "letsencrypt.org"	300

Checks

✓ TTLs within range #32

TTLs: A 5m, MX 1h, NS 1h. The NS TTL at the parent is 1d and in the zone 1h; 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.
✓ CAA restricts issuance #35

Certificates may be issued by: digicert.com, www.digicert.com, letsencrypt.org.