Domain report: dwdl.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

pass

ns.udag.de, ns.udag.net, ns.udag.org

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: ns.udag.de, ns.udag.net, ns.udag.org
NS in the zone: ns.udag.de, ns.udag.net, ns.udag.org

Nameserver	Addresses	Network (AS)	Glue
ns.udag.de	217.160.80.253 2001:8d8:fe:53:217:160:80:253	AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE	217.160.80.253 2001:8d8:fe:53:217:160:80:253
ns.udag.net	185.132.33.253 2607:f1c0:fe:53:185:132:33:253	AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB	-
ns.udag.org	185.132.34.253 2607:f1c0:fe:53:185:132:34:253	AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB	-

Checks

✓ 3 nameservers #6

Delegated to ns.udag.de, ns.udag.net, ns.udag.org.
✓ 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 2 IPv6 /48s.
✓ 2 autonomous systems #11

The nameservers are spread over: AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 4 addresses; AS8560 (IONOS-AS - IONOS SE, DE): 2 addresses.
✓ Nameserver names under 3 TLDs #12

Nameserver names use the TLDs .de, .net, .org.
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

Nameservers

info

6 of 6 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns.udag.de 217.160.80.253	NOERROR, 9 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns.udag.de 2001:8d8:fe:53:217:160:80:253	NOERROR, 9 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns.udag.net 185.132.33.253	NOERROR, 3 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns.udag.net 2607:f1c0:fe:53:185:132:33:253	NOERROR, 3 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns.udag.org 185.132.34.253	NOERROR, 4 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns.udag.org 2607:f1c0:fe:53:185:132:34:253	NOERROR, 3 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/

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: ns.udag.de: "Served by PowerDNS - https://www.powerdns.com/"; ns.udag.net: "Served by PowerDNS - https://www.powerdns.com/"; ns.udag.org: "Served by PowerDNS - https://www.powerdns.com/".

#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 2024100809 · primary ns.udag.de

Found

Primary (MNAME): ns.udag.de
Contact (RNAME): hostmaster.united-domains.de
Serial: 2024100809
Refresh / retry: 10800 s / 3600 s
Expire: 604800 s
Negative TTL: 3600 s

Serial per nameserver

Nameserver	Serial
ns.udag.de (217.160.80.253)	2024100809
ns.udag.de (2001:8d8:fe:53:217:160:80:253)	2024100809
ns.udag.net (185.132.33.253)	2024100809
ns.udag.net (2607:f1c0:fe:53:185:132:33:253)	2024100809
ns.udag.org (185.132.34.253)	2024100809
ns.udag.org (2607:f1c0:fe:53:185:132:34:253)	2024100809

Checks

✓ Serial 2024100809 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 ns.udag.de is one of the listed nameservers.
✓ Contact hostmaster@united-domains.de #25

The SOA RNAME hostmaster.united-domains.de means hostmaster@united-domains.de.
✓ Date-based serial #26

The serial 2024100809 follows the YYYYMMDDnn convention (2024-10-08).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 21 iterations, 24-byte salt
Signatures valid until: 4 December 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
15491	ECDSAP256SHA256 (13)	SHA256 3F91ACC595E8DFF7…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
15491	KSK (257)	ECDSAP256SHA256 (13)
12394	ZSK (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 15491 (SHA256).
✓ Modern algorithms #29

Key algorithms: ECDSAP256SHA256 (13).
✓ Signatures valid until 2026-12-04 #30

The earliest DNSKEY/SOA signature expires at 2026-12-04 02:35 UTC.
!

NSEC3 with extra iterations or salt

NSEC3 uses 21 iterations and a 24-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

info

8 records at the apex

Found

Read from: 217.160.80.253:53

Type	Value	TTL
SOA	ns.udag.de. hostmaster.united-domains.de. 2024100809 10800 3600 604800 3600	86400
NS	ns.udag.org.	86400
NS	ns.udag.net.	86400
NS	ns.udag.de.	86400
A	88.99.138.219	600
MX	10 poststelle.dwdl.de.	3600
TXT	"v=spf1 ip4:88.99.138.219 ip4:138.201.196.141 ip4:49.13.215.5"	600
TXT	"google-site-verification=ZPF7bqPUjtE_wbxS1qSclRUIv60mbTsBn0kXJByLh_A"	600

Checks

✓ TTLs within range #32

TTLs: A 10m, MX 1h, NS 1d.
✓ No CNAME at the apex #33

The zone apex has no CNAME record.
i

Wildcard record

A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.

#34
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