studienwahl.de

Checked 22 October 2026, 00:31 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

dns.noris.net, idefix.arbeitsagentur.de, ns111.arbeitsagentur.de, ns211.arbeitsagentur.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns.noris.net, idefix.arbeitsagentur.de, ns111.arbeitsagentur.de, ns211.arbeitsagentur.de
NS in the zone
dns.noris.net, idefix.arbeitsagentur.de, ns111.arbeitsagentur.de, ns211.arbeitsagentur.de
NameserverAddressesNetwork (AS)Glue
dns.noris.net213.95.0.65 2001:780:53d1::53AS12337 NORIS-NETWORK - noris network AG, DE AS12337 NORIS-NETWORK - noris network AG, DE-
idefix.arbeitsagentur.de185.207.107.165AS197540 netcup-AS - netcup GmbH, DE185.207.107.165
ns111.arbeitsagentur.de195.88.117.9AS12337 NORIS-NETWORK - noris network AG, DE195.88.117.9
ns211.arbeitsagentur.de195.88.117.134AS12337 NORIS-NETWORK - noris network AG, DE195.88.117.134

Checks

  • ✓ 4 nameservers #6
    Delegated to dns.noris.net, idefix.arbeitsagentur.de, ns111.arbeitsagentur.de, ns211.arbeitsagentur.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 1 IPv6 /48.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS12337 (NORIS-NETWORK - noris network AG, DE): 4 addresses; AS197540 (netcup-AS - netcup GmbH, DE): 1 address.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: idefix.arbeitsagentur.de, ns111.arbeitsagentur.de, ns211.arbeitsagentur.de.
    #13

Nameservers

info

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns.noris.net 213.95.0.65NOERROR, 4 ms, authoritativenoyes / yesrefused-
dns.noris.net 2001:780:53d1::53NOERROR, 4 ms, authoritativenoyes / yesrefused-
idefix.arbeitsagentur.de 185.207.107.165NOERROR, 0 ms, authoritativenoyes / yesrefusedYou nosey little rascal
ns111.arbeitsagentur.de 195.88.117.9NOERROR, 5 ms, authoritativenoyes / yesrefusedYou nosey little rascal
ns211.arbeitsagentur.de 195.88.117.134NOERROR, 4 ms, authoritativenoyes / yesrefusedYou nosey little rascal

Checks

  • ✓ All respond #14
    All 5 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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: idefix.arbeitsagentur.de: "You nosey little rascal"; ns111.arbeitsagentur.de: "You nosey little rascal"; ns211.arbeitsagentur.de: "You nosey little rascal".
    #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 2023110808 · primary ns211.arbeitsagentur.de

Found

Primary (MNAME)
ns211.arbeitsagentur.de
Contact (RNAME)
hostmaster.arbeitsagentur.de
Serial
2023110808
Refresh / retry
10800 s / 1800 s
Expire
2419200 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
dns.noris.net (213.95.0.65)2023110808
dns.noris.net (2001:780:53d1::53)2023110808
idefix.arbeitsagentur.de (185.207.107.165)2023110808
ns111.arbeitsagentur.de (195.88.117.9)2023110808
ns211.arbeitsagentur.de (195.88.117.134)2023110808

Checks

  • ✓ Serial 2023110808 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 30m, expire 28d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns211.arbeitsagentur.de is one of the listed nameservers.
  • ✓ Contact hostmaster@arbeitsagentur.de #25
    The SOA RNAME hostmaster.arbeitsagentur.de means hostmaster@arbeitsagentur.de.
  • ✓ Date-based serial #26
    The serial 2023110808 follows the YYYYMMDDnn convention (2023-11-08).

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

pass

12 records at the apex

Found

Read from
213.95.0.65:53
TypeValueTTL
SOAns211.arbeitsagentur.de. hostmaster.arbeitsagentur.de. 2023110808 10800 1800 2419200 1800259200
NSidefix.arbeitsagentur.de.259200
NSns111.arbeitsagentur.de.259200
NSdns.noris.net.259200
NSns211.arbeitsagentur.de.259200
A82.165.99.54259200
A212.34.165.112259200
MX0 .259200
TXT"v=spf1 -all"60
CAA0 issue "letsencrypt.org"259200
CAA0 issue "sectigo.com"259200
CAA0 issuewild "sectigo.com"259200

Checks

  • ✓ TTLs within range #32
    TTLs: A 3d, MX 3d, NS 3d. The NS TTL at the parent is 1d and in the zone 3d; 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: letsencrypt.org, sectigo.com.