telefonica.de

Checked 22 October 2026, 00:40 UTC · via 8.8.8.8
!Passed with warnings
21 passed 3 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

ns1.telefonica.de, ns2.telefonica.de, ns3.telefonica.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.telefonica.de, ns2.telefonica.de, ns3.telefonica.de
NS in the zone
ns1.telefonica.de, ns2.telefonica.de, ns3.telefonica.de
NameserverAddressesNetwork (AS)Glue
ns1.telefonica.de62.53.237.12AS6805 TDDE-ASN1 - Telefonica Germany GmbH & Co.OHG, DE62.53.237.12
ns2.telefonica.de213.20.172.204AS6805 TDDE-ASN1 - Telefonica Germany GmbH & Co.OHG, DE213.20.172.204
ns3.telefonica.de195.71.243.188AS6805 TDDE-ASN1 - Telefonica Germany GmbH & Co.OHG, DE195.71.243.188

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.telefonica.de, ns2.telefonica.de, ns3.telefonica.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: ns1.telefonica.de, ns2.telefonica.de, ns3.telefonica.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.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS6805 (TDDE-ASN1 - Telefonica Germany GmbH & Co.OHG, DE): 3 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • 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

warn

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.telefonica.de 62.53.237.12NOERROR, 4 ms, authoritativenoyes / yesrefusedAkamai ANSPremier 5.5.1.0
ns2.telefonica.de 213.20.172.204NOERROR, 11 ms, authoritativenoyes / yesrefusedAkamai ANSPremier 5.5.1.0
ns3.telefonica.de 195.71.243.188NOERROR, 9 ms, authoritativenoyes / yesrefusedAkamai ANSPremier 5.5.1.0

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.telefonica.de: "Akamai ANSPremier 5.5.1.0"; ns2.telefonica.de: "Akamai ANSPremier 5.5.1.0"; ns3.telefonica.de: "Akamai ANSPremier 5.5.1.0". 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

pass

serial 2417 · primary ns1.telefonica.de

Found

Primary (MNAME)
ns1.telefonica.de
Contact (RNAME)
hostmaster\.de.telefonica.com
Serial
2417
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns1.telefonica.de (62.53.237.12)2417
ns2.telefonica.de (213.20.172.204)2417
ns3.telefonica.de (195.71.243.188)2417

Checks

  • ✓ Serial 2417 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.telefonica.de is one of the listed nameservers.
  • ✓ Contact hostmaster.de@telefonica.com #25
    The SOA RNAME hostmaster\.de.telefonica.com means hostmaster.de@telefonica.com.
  • ✓ Counter serial #26
    The serial 2417 is a plain counter.

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
62.53.237.12:53
TypeValueTTL
SOAns1.telefonica.de. hostmaster\.de.telefonica.com. 2417 28800 7200 604800 6003600
NSns1.telefonica.de.3600
NSns2.telefonica.de.3600
NSns3.telefonica.de.3600
A213.95.181.12300
AAAA2001:780:138:547::d55f:b50c300
MX10 mailserver1.viaginterkom.de.3600
TXT"DirectFedAuthUrl=https://authext-ct.iam.telefonica.de/eiam/SSORedirect/metaAlias/salespartner/PowerBIidp"3600
TXT"v=spf1 mx include:spf.mail.telefonica.de include:spf.servicemail24.de -all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, 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