wissenschaft.de

Checked 22 October 2026, 01:01 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

anycast102.irondns.net, anycast112.irondns.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
anycast102.irondns.net, anycast112.irondns.de
NS in the zone
anycast102.irondns.net, anycast112.irondns.de
NameserverAddressesNetwork (AS)Glue
anycast102.irondns.net195.253.88.5 2a01:5b0:10::5AS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE AS50611 KNIPP-IRONDNS1-AS - Knipp Medien und Kommunikation GmbH, DE-
anycast112.irondns.de195.253.92.7 2a01:5b0:14::7AS8561 KNIPPWORLDWIDE - Knipp Medien und Kommunikation GmbH, DE AS8561 KNIPPWORLDWIDE - Knipp Medien und Kommunikation GmbH, DE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: anycast102.irondns.net, anycast112.irondns.de.
    #6
  • ✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS50611 (KNIPP-IRONDNS1-AS - Knipp Medien und Kommunikation GmbH, DE): 1 address; AS8391 (KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE): 1 address; AS8561 (KNIPPWORLDWIDE - Knipp Medien und Kommunikation GmbH, DE): 2 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
anycast102.irondns.net 195.253.88.5NOERROR, 13 ms, authoritativenoyes / yesrefused-
anycast102.irondns.net 2a01:5b0:10::5NOERROR, 13 ms, authoritativenoyes / yesrefused-
anycast112.irondns.de 195.253.92.7NOERROR, 20 ms, authoritativenoyes / yesrefused-
anycast112.irondns.de 2a01:5b0:14::7NOERROR, 20 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 4 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 2026101501 · primary anycast102.irondns.net

Found

Primary (MNAME)
anycast102.irondns.net
Contact (RNAME)
hostmaster.globvill.de
Serial
2026101501
Refresh / retry
28800 s / 3600 s
Expire
2419200 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
anycast102.irondns.net (195.253.88.5)2026101501
anycast102.irondns.net (2a01:5b0:10::5)2026101501
anycast112.irondns.de (195.253.92.7)2026101501
anycast112.irondns.de (2a01:5b0:14::7)2026101501

Checks

  • ✓ Serial 2026101501 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 1h, expire 28d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver anycast102.irondns.net is one of the listed nameservers.
  • ✓ Contact hostmaster@globvill.de #25
    The SOA RNAME hostmaster.globvill.de means hostmaster@globvill.de.
  • ✓ Date-based serial #26
    The serial 2026101501 follows the YYYYMMDDnn convention (2026-10-15).

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

8 records at the apex

Found

Read from
195.253.88.5:53
TypeValueTTL
SOAanycast102.irondns.net. hostmaster.globvill.de. 2026101501 28800 3600 2419200 36003600
NSanycast102.irondns.net.3600
NSanycast112.irondns.de.3600
A187.77.77.1483600
MX5 wissenschaft-de.mail.protection.outlook.com.3600
TXT"MS=ms38435682"3600
TXT"v=spf1 include:spf.protection.outlook.com -all"3600
TXT"google-site-verification=X2vcaSOti_6mAdJaBYyF5ZFVfwrhDoptlzoI96YrJKg"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, 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