dvka.de

Checked 21 October 2026, 22:15 UTC · via 8.8.8.8
!Passed with warnings
24 passed 1 warning 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

ns01.itsg.de, ns02.itsg.de, ns03.itsg.de, ns04.itsg.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns01.itsg.de, ns02.itsg.de, ns03.itsg.de, ns04.itsg.de
NS in the zone
ns01.itsg.de, ns02.itsg.de, ns03.itsg.de, ns04.itsg.de
NameserverAddressesNetwork (AS)Glue
ns01.itsg.de185.162.248.74 2a03:4000:1a:3d3::2AS197540 netcup-AS - netcup GmbH, DE AS197540 netcup-AS - netcup GmbH, DE185.162.248.74 2a03:4000:1a:3d3::2
ns02.itsg.de134.255.247.228 2a0a:51c0::1:0:4AS48314 IP-PROJECTS - Michael Sebastian Schinzel trading as IP-Projects GmbH & Co. KG, DE AS48314 IP-PROJECTS - Michael Sebastian Schinzel trading as IP-Projects GmbH & Co. KG, DE134.255.247.228 2a0a:51c0::1:0:4
ns03.itsg.de138.201.157.131 2a01:4f8:1c17:574e::2AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE138.201.157.131 2a01:4f8:1c17:574e::2
ns04.itsg.de54.38.158.45 2001:41d0:701:1100::6f5AS16276 OVH - OVH SAS, FR AS16276 OVH - OVH SAS, FR54.38.158.45 2001:41d0:701:1100::6f5

Checks

  • ✓ 4 nameservers #6
    Delegated to ns01.itsg.de, ns02.itsg.de, ns03.itsg.de, ns04.itsg.de.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✓ 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 4 IPv4 /24s and 4 IPv6 /48s.
  • ✓ 4 autonomous systems #11
    The nameservers are spread over: AS16276 (OVH - OVH SAS, FR): 2 addresses; AS197540 (netcup-AS - netcup GmbH, DE): 2 addresses; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 2 addresses; AS48314 (IP-PROJECTS - Michael Sebastian Schinzel trading as IP-Projects GmbH & Co. KG, 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns01.itsg.de 185.162.248.74NOERROR, 1 ms, authoritativenoyes / yesrefused-
ns01.itsg.de 2a03:4000:1a:3d3::2NOERROR, 1 ms, authoritativenoyes / yesrefused-
ns02.itsg.de 134.255.247.228NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns02.itsg.de 2a0a:51c0::1:0:4NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns03.itsg.de 138.201.157.131NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns03.itsg.de 2a01:4f8:1c17:574e::2NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns04.itsg.de 54.38.158.45NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns04.itsg.de 2001:41d0:701:1100::6f5NOERROR, 5 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 8 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 1790143710 · primary ns01.itsg.de

Found

Primary (MNAME)
ns01.itsg.de
Contact (RNAME)
hostmaster.itsg.de
Serial
1790143710
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns01.itsg.de (185.162.248.74)1790143710
ns01.itsg.de (2a03:4000:1a:3d3::2)1790143710
ns02.itsg.de (134.255.247.228)1790143710
ns02.itsg.de (2a0a:51c0::1:0:4)1790143710
ns03.itsg.de (138.201.157.131)1790143710
ns03.itsg.de (2a01:4f8:1c17:574e::2)1790143710
ns04.itsg.de (54.38.158.45)1790143710
ns04.itsg.de (2001:41d0:701:1100::6f5)1790143710

Checks

  • ✓ Serial 1790143710 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 ns01.itsg.de is one of the listed nameservers.
  • ✓ Contact hostmaster@itsg.de #25
    The SOA RNAME hostmaster.itsg.de means hostmaster@itsg.de.
  • ✓ Timestamp serial #26
    The serial 1790143710 is a Unix timestamp (2026-09-23 06:08 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

12 records at the apex

Found

Read from
185.162.248.74:53
TypeValueTTL
SOAns01.itsg.de. hostmaster.itsg.de. 1790143710 10800 3600 604800 360014400
NSns03.itsg.de.14400
NSns04.itsg.de.14400
NSns01.itsg.de.14400
NSns02.itsg.de.14400
A185.251.179.16614400
MX10 mx-02-eu-central-1.prod.hydra.sophos.com.3600
MX10 mx-01-eu-central-1.prod.hydra.sophos.com.3600
TXT"sophos-domain-verification=cc4f572e8113c0b034265136612829945bb573473d5f16da4d4ee41275de3462"14400
TXT"sophos-domain-verification=f8d67977b6c61528b2501a39bbb0959bc8b86579"14400
TXT"v=spf1 mx a include:spf.protection.outlook.com ip4:185.251.176.0/22 ip6:2a0c:14c0::/32 ip4:217.76.100.240/28 include:_spf_eucentral1.prod.hydra.sophos.com -all"14400
TXT"MS=ms48947560"14400

Checks

  • ✓ TTLs within range #32
    TTLs: A 4h, MX 1h, NS 4h. The NS TTL at the parent is 1d and in the zone 4h; 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