ludwigshafen.de

Checked 21 October 2026, 23:20 UTC · via 8.8.8.8
!Passed with warnings
21 passed 2 warnings 0 failed 6 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

warn

ns1.twl-kom.de, ns3.twl-kom.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.twl-kom.de, ns3.twl-kom.de
NS in the zone
ns1.twl-kom.de, ns3.twl-kom.de
NameserverAddressesNetwork (AS)Glue
ns1.twl-kom.de217.151.144.10 2a00:e58:1:9:217:151:144:10AS9022 TWL-KOM-AS - TWL-KOM GmbH, DE AS9022 TWL-KOM-AS - TWL-KOM GmbH, DE217.151.144.10
ns3.twl-kom.de85.115.3.98AS12843 TELEMAXX - TelemaxX Telekommunikation GmbH, DE85.115.3.98

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.twl-kom.de, ns3.twl-kom.de.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: ns1.twl-kom.de (glue 217.151.144.10, zone 217.151.144.10, 2a00:e58:1:9:217:151:144:10). Update the glue at your registrar.
    #8
  • ✓ 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 2 IPv4 /24s and 1 IPv6 /48.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS12843 (TELEMAXX - TelemaxX Telekommunikation GmbH, DE): 1 address; AS9022 (TWL-KOM-AS - TWL-KOM 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: ns3.twl-kom.de.
    #13

Nameservers

pass

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.twl-kom.de 217.151.144.10NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns1.twl-kom.de 2a00:e58:1:9:217:151:144:10NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns3.twl-kom.de 85.115.3.98NOERROR, 5 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 3 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 2764151488 · primary ns1.twl-kom.de

Found

Primary (MNAME)
ns1.twl-kom.de
Contact (RNAME)
hostmaster.twlkom.de
Serial
2764151488
Refresh / retry
86400 s / 7200 s
Expire
3600000 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns1.twl-kom.de (217.151.144.10)2764151488
ns1.twl-kom.de (2a00:e58:1:9:217:151:144:10)2764151488
ns3.twl-kom.de (85.115.3.98)2764151488

Checks

  • ✓ Serial 2764151488 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 2h, expire 1000h, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.twl-kom.de is one of the listed nameservers.
  • ✓ Contact hostmaster@twlkom.de #25
    The SOA RNAME hostmaster.twlkom.de means hostmaster@twlkom.de.
  • ✓ Timestamp serial #26
    The serial 2764151488 is a Unix timestamp (2057-08-04 11:51 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

9 records at the apex

Found

Read from
217.151.144.10:53
TypeValueTTL
SOAns1.twl-kom.de. hostmaster.twlkom.de. 2764151488 86400 7200 3600000 600600
NSns1.twl-kom.de.600
NSns3.twl-kom.de.600
A80.90.19.177600
MX70 mailsec02.ludwigshafen.de.600
MX60 mailsec01.ludwigshafen.de.600
TXT"brevo-code:b04009602d1c8a39e0cb8428c7dc3922"600
TXT"apple-domain-verification=6zw2J8qCxZNCvmr2"600
TXT"v=spf1 a mx include:ekom21.de include:spf.smtp.net ip4:213.139.155.66 ip4:217.151.147.131 ip4:83.243.48.64/26 ip4:194.25.167.0/24 include:spf.twl-kom.de a:mldi0002out.rlp.de include:sendgrid.net ~all"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 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