merkur-online.de

Checked 21 October 2026, 23:22 UTC · via 8.8.8.8
!Passed with warnings
23 passed 2 warnings 0 failed 4 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

info

pns.dtag.de, pns.merkur-online.de, secondary006.dtag.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
pns.dtag.de, pns.merkur-online.de, secondary006.dtag.net
NS in the zone
pns.dtag.de, pns.merkur-online.de, secondary006.dtag.net
NameserverAddressesNetwork (AS)Glue
pns.dtag.de194.25.0.125 2003:40:8000::100AS3320 DTAG - Deutsche Telekom AG, DE AS3320 DTAG - Deutsche Telekom AG, DE194.25.0.125 2003:40:8000::100
pns.merkur-online.de91.239.20.10AS199090 MZV-AS - Muenchener Zeitungsverlag GmbH & Co. KG, DE91.239.20.10
secondary006.dtag.net195.244.245.25 2a00:fa8:3:0:100:0:6:1AS5605 NETUSE - NetUSE AG, DE AS5605 NETUSE - NetUSE AG, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to pns.dtag.de, pns.merkur-online.de, secondary006.dtag.net.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: pns.merkur-online.de.
  • ✓ 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.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS199090 (MZV-AS - Muenchener Zeitungsverlag GmbH & Co. KG, DE): 1 address; AS3320 (DTAG - Deutsche Telekom AG, DE): 2 addresses; AS5605 (NETUSE - NetUSE AG, DE): 2 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: pns.merkur-online.de.
    #13

Nameservers

warn

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
pns.dtag.de 194.25.0.125NOERROR, 9 ms, authoritativenoyes / yesrefusedDomainNameServer
pns.dtag.de 2003:40:8000::100NOERROR, 10 ms, authoritativenoyes / yesrefusedDomainNameServer
pns.merkur-online.de 91.239.20.10NOERROR, 12 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.7.3
secondary006.dtag.net 195.244.245.25NOERROR, 12 ms, authoritativenoyes / yesrefusedDomainNameServer
secondary006.dtag.net 2a00:fa8:3:0:100:0:6:1NOERROR, 16 ms, authoritativenoyes / yesrefusedDomainNameServer

Checks

  • ✓ All respond #14
    All 5 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: pns.merkur-online.de: "PowerDNS Authoritative Server 4.7.3". 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

pass

serial 2026051201 · primary pns.merkur-online.de

Found

Primary (MNAME)
pns.merkur-online.de
Contact (RNAME)
hostmaster.merkur-online.de
Serial
2026051201
Refresh / retry
14400 s / 3600 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
pns.dtag.de (194.25.0.125)2026051201
pns.dtag.de (2003:40:8000::100)2026051201
pns.merkur-online.de (91.239.20.10)2026051201
secondary006.dtag.net (195.244.245.25)2026051201
secondary006.dtag.net (2a00:fa8:3:0:100:0:6:1)2026051201

Checks

  • ✓ Serial 2026051201 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver pns.merkur-online.de is one of the listed nameservers.
  • ✓ Contact hostmaster@merkur-online.de #25
    The SOA RNAME hostmaster.merkur-online.de means hostmaster@merkur-online.de.
  • ✓ Date-based serial #26
    The serial 2026051201 follows the YYYYMMDDnn convention (2026-05-12).

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

10 records at the apex

Found

Read from
194.25.0.125:53
TypeValueTTL
SOApns.merkur-online.de. hostmaster.merkur-online.de. 2026051201 14400 3600 604800 36003600
NSpns.merkur-online.de.3600
NSpns.dtag.de.3600
NSsecondary006.dtag.net.3600
A193.218.202.883600
MX10 merkuronline-de01e.mail.protection.outlook.com.3600
TXT"MS=ms11831835"3600
TXT"google-site-verification=mxqQra1IXZzSNHwh3LeAYqzlP56F45k_-umrmzM2Pyc"3600
TXT"v=spf1 include:spf.protection.outlook.com include:spf.ippen-media.de ~all"3600
TXT"MS=8843936A1FC652BA24CA08C2E319C2A58814D6D6"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, 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.
  • 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