Domain report: rtl2.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.cc-net.de, ns1.rtl2.de, ns2.cc-net.de

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: ns1.cc-net.de, ns1.rtl2.de, ns2.cc-net.de
NS in the zone: ns1.cc-net.de, ns1.rtl2.de, ns2.cc-net.de, pfire-1.rtl2.de, pfire-2.rtl2.de

Nameserver	Addresses	Network (AS)	Glue
ns1.cc-net.de	213.183.80.5	AS21473 PFALZKOM - PFALZKOM GmbH, DE	213.183.80.5
ns1.rtl2.de	185.181.224.4 2a0a:d480:1:1::100	AS206549 RTL2_Fernsehen - RTL2 FERNSEHEN GMBH & CO. KG, DE -	185.181.224.4 2a0a:d480:1:1::100
ns2.cc-net.de	213.183.81.5	AS21473 PFALZKOM - PFALZKOM GmbH, DE	213.183.81.5
pfire-1.rtl2.de (zone only)	185.181.224.4 2a0a:d480:1:1::100	AS206549 RTL2_Fernsehen - RTL2 FERNSEHEN GMBH & CO. KG, DE -	-
pfire-2.rtl2.de (zone only)	185.181.224.6 2a0a:d480:1:1::102	AS206549 RTL2_Fernsehen - RTL2 FERNSEHEN GMBH & CO. KG, DE -	-

Checks

✓ 3 nameservers #6

Delegated to ns1.cc-net.de, ns1.rtl2.de, ns2.cc-net.de.
!

NS sets differ

The nameservers at the parent and in the zone should be the same. Only in the zone: pfire-1.rtl2.de, pfire-2.rtl2.de. ns1.cc-net.de, ns1.rtl2.de, ns2.cc-net.de, pfire-1.rtl2.de, pfire-2.rtl2.de report NS ns1.cc-net.de ns1.rtl2.de ns2.cc-net.de pfire-1.rtl2.de pfire-2.rtl2.de.

#7
✓ Glue present and correct #8

Glue is published for the nameservers inside the zone: ns1.rtl2.de.
✓ All names resolve #9

Every nameserver name has an address and is not an alias.
i

One address family in one network

all IPv6 addresses are in 2a0a:d480:1::/48, while the other address family is spread over several networks.

#10
✓ 2 autonomous systems #11

The nameservers are spread over: AS206549 (RTL2_Fernsehen - RTL2 FERNSEHEN GMBH & CO. KG, DE): 3 addresses; AS21473 (PFALZKOM - PFALZKOM GmbH, DE): 2 addresses.
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: ns1.cc-net.de, ns2.cc-net.de.

#13

Nameservers

fail

5 of 8 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.cc-net.de 213.183.80.5	NOERROR, 9 ms, authoritative	no	yes / yes	refused	9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.3
ns1.rtl2.de 185.181.224.4	NOERROR, 13 ms, authoritative	no	yes / yes	refused	NSD 4.15.0
ns1.rtl2.de 2a0a:d480:1:1::100	no response	no	no / no	-	-
ns2.cc-net.de 213.183.81.5	NOERROR, 7 ms, authoritative	no	yes / yes	refused	9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.3
pfire-1.rtl2.de 185.181.224.4	NOERROR, 13 ms, authoritative	no	yes / yes	refused	NSD 4.15.0
pfire-1.rtl2.de 2a0a:d480:1:1::100	no response	no	no / no	-	-
pfire-2.rtl2.de 185.181.224.6	NOERROR, 12 ms, authoritative	no	yes / yes	refused	NSD 4.15.0
pfire-2.rtl2.de 2a0a:d480:1:1::102	no response	no	no / no	-	-

Checks

✗

Nameservers not responding

These addresses did not answer, so resolvers waste time on timeouts: ns1.rtl2.de (2a0a:d480:1:1::100): read udp [2a01:4f8:1c1c:eebf::1]:36634->[2a0a:d480:1:1::100]:53: i/o timeout; pfire-1.rtl2.de (2a0a:d480:1:1::100): read udp [2a01:4f8:1c1c:eebf::1]:46420->[2a0a:d480:1:1::100]:53: i/o timeout; pfire-2.rtl2.de (2a0a:d480:1:1::102): read udp [2a01:4f8:1c1c:eebf::1]:55299->[2a0a:d480:1:1::102]:53: i/o timeout.

#14
✓ 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: ns1.cc-net.de: "9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.3"; ns1.rtl2.de: "NSD 4.15.0"; ns2.cc-net.de: "9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.3"; pfire-1.rtl2.de: "NSD 4.15.0"; pfire-2.rtl2.de: "NSD 4.15.0". 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.

SOA

warn

serial 1791966973 · primary pfire-1.rtl2.de

Found

Primary (MNAME): pfire-1.rtl2.de
Contact (RNAME): postmaster.rtl2.de
Serial: 1791966973
Refresh / retry: 600 s / 600 s
Expire: 86400 s
Negative TTL: 600 s

Serial per nameserver

Nameserver	Serial
ns1.cc-net.de (213.183.80.5)	1791966973
ns1.rtl2.de (185.181.224.4)	1791966973
ns2.cc-net.de (213.183.81.5)	1791966973
pfire-1.rtl2.de (185.181.224.4)	1791966973
pfire-2.rtl2.de (185.181.224.6)	1791966983

Checks

!

Serials differ

The nameservers serve different versions of the zone: 1791966973 on ns1.cc-net.de (213.183.80.5), ns1.rtl2.de (185.181.224.4), ns2.cc-net.de (213.183.81.5), pfire-1.rtl2.de (185.181.224.4); 1791966983 on pfire-2.rtl2.de (185.181.224.6). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.

#22
!

Unusual SOA timers

refresh 10m is outside 20m–1d; retry 10m should be shorter than refresh 10m; expire 1d is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 10m, retry 10m, expire 1d, negative TTL 10m.

#23
✓ Primary is a public nameserver #24

The primary nameserver pfire-1.rtl2.de is one of the listed nameservers.
✓ Contact postmaster@rtl2.de #25

The SOA RNAME postmaster.rtl2.de means postmaster@rtl2.de.
✓ Timestamp serial #26

The serial 1791966973 is a Unix timestamp (2026-10-14 08:36 UTC).

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

28 records at the apex

Found

Read from: 213.183.80.5:53

Type	Value	TTL
SOA	pfire-1.rtl2.de. postmaster.rtl2.de. 1791966973 600 600 86400 600	600
NS	ns1.rtl2.de.	600
NS	pfire-1.rtl2.de.	600
NS	ns1.cc-net.de.	600
NS	ns2.cc-net.de.	600
NS	pfire-2.rtl2.de.	600
A	23.219.84.176	600
AAAA	2a02:26f0:f500:481::472	600
AAAA	2a02:26f0:f500:485::472	600
MX	0 rtl2-de.mail.protection.outlook.com.	600
TXT	"d365mktkey=SJxs4aYvZypFyJhhtL9S7McvjmMUEIHdD0YYTNxr1FUx"	600
TXT	"d365mktkey=QFkdVFxTa6hfLgo0oMxEIYuNzjpiFxXtMTC0MGee0KQx"	600
TXT	"1password-site-verification=JYVSTHASUNBSHCWEVTPWU2DPNM"	600
TXT	"docusign=f0810f63-8bd3-4a7d-a110-81a1b772a118"	600
TXT	"sNoliX3+UuzoVj2+RaIurGzR+HvuekPkX+LCPsKTSa6lWfJUvdpdvT2VoN2ldVVMlM9nh7h+YFaMphl6SzXuaA=="	600
TXT	"openai-domain-verification=dv-iSlDfaOcF81rlp2TtBg5FcrW"	600
TXT	"miro-verification=c02df9cb9ddd84dc2f77ebf323270c9534893e41"	600
TXT	"google-site-verification=i2RSraTywzGvRJhWiVujvrIrkAIk03ulqYYoopEcaFk"	600
TXT	"v=spf1 a:rtl2.de ip6:2a0a:d480:10::/60 ip4:185.181.224.0/22 ip4:35.158.39.227/32 include:inxserver.com include:spf.de.umantis.com include:spf.protection.outlook.com include:spf-de.emailsignatures365.com mx:rogsurvey.de -all"	600
TXT	"MS=ms31817015"	600
TXT	"8mgn56hpk2h8vbij6o6et98h83"	600
TXT	"adobe-idp-site-verification=1ab58e56a7c5cfcf85df9cf0e34dc26505b7982a08fd338b70244c5611b99242"	600
TXT	"MS=ms60616196"	600
TXT	"MS=ms55041809"	600
TXT	"e40mv/LvZ/JR99nvlkCVRJ6NGWWKPNXizUrCxPCALe7WuGF0UZrgt0tAJc5noh57JEIDqsH/fa/WUFqW7N0Ezg=="	600
TXT	"apple-domain-verification=XhunxhOP2sdxydJA"	600
TXT	"google-site-verification=-QFGxQf9KPHidYyDOKLwZ-ys0rwZlvaB5DutS-47LCg"	600
TXT	"d365mktkey=Djd2xuw3xQxKVIFklBEKYZzP0ZJNOLjeBxx23c7wOgIx"	600

Checks

✓ TTLs within range #32

TTLs: A 10m, AAAA 10m, MX 10m, NS 10m. The NS TTL at the parent is 1d and in the zone 10m; 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