rlp.de

Checked 22 October 2026, 00:00 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 warnings 0 failed 5 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

dldi0001.rlp.de, ns02.versatel.de, ns03.versatel.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dldi0001.rlp.de, ns02.versatel.de, ns03.versatel.de
NS in the zone
dldi0001.rlp.de, ns02.versatel.de, ns03.versatel.de
NameserverAddressesNetwork (AS)Glue
dldi0001.rlp.de83.243.48.69AS3320 DTAG - Deutsche Telekom AG, DE83.243.48.69
ns02.versatel.de212.7.128.165AS8881 VERSATEL - 1&1 Versatel GmbH, DE212.7.128.165
ns03.versatel.de193.219.15.17AS8881 VERSATEL - 1&1 Versatel GmbH, DE193.219.15.17

Checks

  • ✓ 3 nameservers #6
    Delegated to dldi0001.rlp.de, ns02.versatel.de, ns03.versatel.de.
  • ✓ 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: dldi0001.rlp.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 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS3320 (DTAG - Deutsche Telekom AG, DE): 1 address; AS8881 (VERSATEL - 1&1 Versatel 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

info

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dldi0001.rlp.de 83.243.48.69NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns02.versatel.de 212.7.128.165NOERROR, 17 ms, authoritativenoyes / yesrefusedNo version info available (refused).
ns03.versatel.de 193.219.15.17NOERROR, 11 ms, authoritativenoyes / yesrefusedNo version info available (refused).

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns02.versatel.de: "No version info available (refused)."; ns03.versatel.de: "No version info available (refused).".
    #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 2026102100 · primary dldi0001.rlp.de

Found

Primary (MNAME)
dldi0001.rlp.de
Contact (RNAME)
dnsadmin.nic.rlp.de
Serial
2026102100
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
dldi0001.rlp.de (83.243.48.69)2026102100
ns02.versatel.de (212.7.128.165)2026102100
ns03.versatel.de (193.219.15.17)2026102100

Checks

  • ✓ Serial 2026102100 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 dldi0001.rlp.de is one of the listed nameservers.
  • ✓ Contact dnsadmin@nic.rlp.de #25
    The SOA RNAME dnsadmin.nic.rlp.de means dnsadmin@nic.rlp.de.
  • ✓ Date-based serial #26
    The serial 2026102100 follows the YYYYMMDDnn convention (2026-10-21).

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

11 records at the apex

Found

Read from
83.243.48.69:53
TypeValueTTL
SOAdldi0001.rlp.de. dnsadmin.nic.rlp.de. 2026102100 10800 3600 604800 3600300
NSns03.versatel.de.300
NSns02.versatel.de.300
NSdldi0001.rlp.de.300
A83.243.54.63300
MX10 mailmx0004.rlp.de.300
MX10 mailmx0003.rlp.de.300
MX10 mailmx0001.rlp.de.300
MX10 mailmx0002.rlp.de.300
TXT"v=spf1 ip4:83.243.48.64/26 ~all"300
TXT"_telesec-domain-validation=361318_2026-09-08_h63AiDRjley1SP1pcTAwRlpwvN4SEusYS1aEax7qDw5arkmvTq"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, NS 5m. The NS TTL at the parent is 1d and in the zone 5m; 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