spd.de

Checked 22 October 2026, 00:23 UTC · via 8.8.8.8
!Passed with warnings
19 passed 3 warnings 0 failed 7 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

dns2.spd.de, ns1.arcor-ip.de, ns2.arcor-ip.de, ns3.arcor-ip.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns2.spd.de, ns1.arcor-ip.de, ns2.arcor-ip.de, ns3.arcor-ip.de
NS in the zone
dns2.spd.de, ns1.vodafone-ip.de, ns2.vodafone-ip.de, ns3.vodafone-ip.de
NameserverAddressesNetwork (AS)Glue
dns2.spd.de195.50.146.131AS3209 VODANET - Vodafone GmbH, DE195.50.146.131
ns1.arcor-ip.de (parent only)145.253.2.144 2a01:860:0:202::53AS3209 VODANET - Vodafone GmbH, DE AS3209 VODANET - Vodafone GmbH, DE145.253.2.144 2a01:860:0:202::53
ns1.vodafone-ip.de (zone only)145.253.2.144 2a01:860:0:202::53AS3209 VODANET - Vodafone GmbH, DE AS3209 VODANET - Vodafone GmbH, DE-
ns2.arcor-ip.de (parent only)145.253.3.16 2a01:860:0:203::53AS3209 VODANET - Vodafone GmbH, DE AS3209 VODANET - Vodafone GmbH, DE145.253.3.16 2a01:860:0:203::53
ns2.vodafone-ip.de (zone only)145.253.3.16 2a01:860:0:203::53AS3209 VODANET - Vodafone GmbH, DE AS3209 VODANET - Vodafone GmbH, DE-
ns3.arcor-ip.de (parent only)145.253.3.20 2a01:860:0:204::53AS3209 VODANET - Vodafone GmbH, DE AS3209 VODANET - Vodafone GmbH, DE145.253.3.20 2a01:860:0:204::53
ns3.vodafone-ip.de (zone only)145.253.3.20 2a01:860:0:204::53AS3209 VODANET - Vodafone GmbH, DE AS3209 VODANET - Vodafone GmbH, DE-

Checks

  • ✓ 4 nameservers #6
    Delegated to dns2.spd.de, ns1.arcor-ip.de, ns2.arcor-ip.de, ns3.arcor-ip.de.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns1.arcor-ip.de, ns2.arcor-ip.de, ns3.arcor-ip.de; only in the zone: ns1.vodafone-ip.de, ns2.vodafone-ip.de, ns3.vodafone-ip.de. dns2.spd.de, ns1.arcor-ip.de, ns1.vodafone-ip.de, ns2.arcor-ip.de, ns2.vodafone-ip.de, ns3.arcor-ip.de, ns3.vodafone-ip.de report NS dns2.spd.de ns1.vodafone-ip.de ns2.vodafone-ip.de ns3.vodafone-ip.de.
    #7
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: dns2.spd.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 2a01:860::/48, while the other address family is spread over several networks.
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS3209 (VODANET - Vodafone GmbH, DE): 13 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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: dns2.spd.de.
    #13

Nameservers

warn

13 of 13 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns2.spd.de 195.50.146.131NOERROR, 15 ms, authoritativenoyes / yesrefused9.8.3.5
ns1.arcor-ip.de 145.253.2.144NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns1.arcor-ip.de 2a01:860:0:202::53NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns1.vodafone-ip.de 145.253.2.144NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns1.vodafone-ip.de 2a01:860:0:202::53NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns2.arcor-ip.de 145.253.3.16NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns2.arcor-ip.de 2a01:860:0:203::53NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns2.vodafone-ip.de 145.253.3.16NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns2.vodafone-ip.de 2a01:860:0:203::53NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns3.arcor-ip.de 145.253.3.20NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns3.arcor-ip.de 2a01:860:0:204::53NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns3.vodafone-ip.de 145.253.3.20NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns3.vodafone-ip.de 2a01:860:0:204::53NOERROR, 9 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 13 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: dns2.spd.de: "9.8.3.5". 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 2026101602 · primary dns2.spd.de

Found

Primary (MNAME)
dns2.spd.de
Contact (RNAME)
admin.spd.de
Serial
2026101602
Refresh / retry
3600 s / 600 s
Expire
604800 s
Negative TTL
38400 s

Serial per nameserver

NameserverSerial
dns2.spd.de (195.50.146.131)2026101602
ns1.arcor-ip.de (145.253.2.144)2026101602
ns1.arcor-ip.de (2a01:860:0:202::53)2026101602
ns1.vodafone-ip.de (145.253.2.144)2026101602
ns1.vodafone-ip.de (2a01:860:0:202::53)2026101602
ns2.arcor-ip.de (145.253.3.16)2026101602
ns2.arcor-ip.de (2a01:860:0:203::53)2026101602
ns2.vodafone-ip.de (145.253.3.16)2026101602
ns2.vodafone-ip.de (2a01:860:0:203::53)2026101602
ns3.arcor-ip.de (145.253.3.20)2026101602
ns3.arcor-ip.de (2a01:860:0:204::53)2026101602
ns3.vodafone-ip.de (145.253.3.20)2026101602
ns3.vodafone-ip.de (2a01:860:0:204::53)2026101602

Checks

  • ✓ Serial 2026101602 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 10m, expire 7d, negative TTL 640m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns2.spd.de is one of the listed nameservers.
  • ✓ Contact admin@spd.de #25
    The SOA RNAME admin.spd.de means admin@spd.de.
  • ✓ Date-based serial #26
    The serial 2026101602 follows the YYYYMMDDnn convention (2026-10-16).

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

17 records at the apex

Found

Read from
195.50.146.131:53
TypeValueTTL
SOAdns2.spd.de. admin.spd.de. 2026101602 3600 600 604800 384003600
NSns1.vodafone-ip.de.86400
NSns2.vodafone-ip.de.86400
NSns3.vodafone-ip.de.86400
NSdns2.spd.de.86400
A37.49.153.251300
MX20 mail.gslb.spd.de.1800
TXT"cisco-ci-domain-verification=13ce03b44cd7d682f19b3a0ed79d62dac1d3e5ecd6e7265c9833f5e2ad3c9cee"3600
TXT"google-site-verification=UmHeW-YjJXL-_P1xt5uyKUQ4bYRYBYWfvpkOnN79AQk"3600
TXT"v=spf1 a mx ip4:195.50.146.128/26 ip4:213.160.72.146 ip4:185.150.34.20 ip4:185.150.32.4 ip6:2a00:17d8:100::18a1 include:spf.srv2.de include:spf.protection.outlook.com ~all"3600
TXT"MS=ms73454678"3600
TXT"25reports=45a699a94ba59da0b0c54ea6"3600
TXT"+x+GL2CdGup1zAZ1BJyMl930XZHEV1alGFl3WhsldthH/eiUUgpMjIACsJCaBE0RhGy0Twi4735gFVjueEebPg=="3600
TXT"google-site-verification=3s7a17CikxU-wDMPTc3L8CMHQEpUjAMrNyBHjSW24Lk"3600
TXT"E7RMUIM3F9753DC5MC1JVLPOQD"3600
TXT"cisco-ci-domain-verification=6355fa2a8a315ebf1e32ec4dd157dcb472b08a93da4a5108f584a5bf3948ff89"3600
TXT"langdock-verify=_QfNax6QUbn6CLd06JfTNwTTSjpPPNHZUAyXz7m_Bdg"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 30m, NS 1d.
  • ✓ 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