insm.de

Checked 21 October 2026, 23:00 UTC · via 8.8.8.8
!Passed with warnings
25 passed 1 warning 0 failed 3 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

pass

ns.second-ns.com, ns1.your-server.de, ns3.second-ns.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.second-ns.com, ns1.your-server.de, ns3.second-ns.de
NS in the zone
ns.second-ns.com, ns1.your-server.de, ns3.second-ns.de
NameserverAddressesNetwork (AS)Glue
ns.second-ns.com213.239.204.242 2a01:4f8:0:a101::b:1AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE-
ns1.your-server.de213.133.100.102 2a01:4f8:0:1::5ddc:1AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE213.133.100.102 2a01:4f8:0:1::5ddc:1
ns3.second-ns.de193.47.99.4 2001:67c:192c::add:b3AS12337 NORIS-NETWORK - noris network AG, DE AS12337 NORIS-NETWORK - noris network AG, DE193.47.99.4 2001:67c:192c::add:b3

Checks

  • ✓ 3 nameservers #6
    Delegated to ns.second-ns.com, ns1.your-server.de, ns3.second-ns.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 3 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS12337 (NORIS-NETWORK - noris network AG, DE): 2 addresses; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 4 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .de.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.second-ns.com 213.239.204.242NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns.second-ns.com 2a01:4f8:0:a101::b:1NOERROR, 6 ms, authoritativenoyes / yesrefused-
ns1.your-server.de 213.133.100.102NOERROR, 2 ms, authoritativenoyes / yesrefused-
ns1.your-server.de 2a01:4f8:0:1::5ddc:1NOERROR, 1 ms, authoritativenoyes / yesrefused-
ns3.second-ns.de 193.47.99.4NOERROR, 6 ms, authoritativenoyes / yesrefused-
ns3.second-ns.de 2001:67c:192c::add:b3NOERROR, 8 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 6 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 2026101700 · primary ns1.your-server.de

Found

Primary (MNAME)
ns1.your-server.de
Contact (RNAME)
postmaster.your-server.de
Serial
2026101700
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
360 s

Serial per nameserver

NameserverSerial
ns.second-ns.com (213.239.204.242)2026101700
ns.second-ns.com (2a01:4f8:0:a101::b:1)2026101700
ns1.your-server.de (213.133.100.102)2026101700
ns1.your-server.de (2a01:4f8:0:1::5ddc:1)2026101700
ns3.second-ns.de (193.47.99.4)2026101700
ns3.second-ns.de (2001:67c:192c::add:b3)2026101700

Checks

  • ✓ Serial 2026101700 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 6m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.your-server.de is one of the listed nameservers.
  • ✓ Contact postmaster@your-server.de #25
    The SOA RNAME postmaster.your-server.de means postmaster@your-server.de.
  • ✓ Date-based serial #26
    The serial 2026101700 follows the YYYYMMDDnn convention (2026-10-17).

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

13 records at the apex

Found

Read from
213.239.204.242:53
TypeValueTTL
SOAns1.your-server.de. postmaster.your-server.de. 2026101700 28800 7200 604800 360360
NSns3.second-ns.de.360
NSns.second-ns.com.360
NSns1.your-server.de.360
A195.201.4.180360
MX10 mx1.mas.t-systems-service.com.300
MX20 mx2.mas.t-systems-service.com.300
MX30 mx3.mas.t-systems-service.com.300
TXT"google-site-verification=-gUg-OlzvKLSX1_6Rpim_vY0MJsGy2liibs7JfFpKPg"360
TXT"google-site-verification=jC4kzCJEB4kAkGBL0RHIPeV2_8ZoGy5BEgBbrIfqy_s"360
TXT"v=spf1 include:spf.dynect.net include:spf.srv2.de include:spf.crsend.com include:spf.mailjet.com include:newsmailservice.de a:spf.mas.t-systems-service.com ip4:87.79.12.44 ip4:87.79.12.45 ip4:89.1.85.243 ip4:176.9.21.28 ip4:212.114.35.242 ip4:212.114.34.2" "32 ip4:212.114.34.50 ip4:212.114.35.226 ip4:85.13.129.239 ip4:172.16.244.130 ip4:87.79.12.40 ip4:172.16.244.15 include:spf.protection.outlook.com ip4:195.201.4.180 ~all"360
TXT"Pm76dp+sgN1ravwv+9U4dIj/o3KEJSb9uKkdAmrmGCPwEJ7uuPYSKAbCvMWa188gp8mwSkrMryaNoqNdmHhiOA=="360
TXT"brevo-code:9cea99f41fb5be06530725caf26170b7"360

Checks

  • ✓ TTLs within range #32
    TTLs: A 6m, MX 5m, NS 6m. The NS TTL at the parent is 1d and in the zone 6m; 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