planetarium-hamburg.de

Checked 21 October 2026, 23:50 UTC · via 8.8.8.8
!Passed with warnings
22 passed 1 warning 0 failed 6 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

hulk.work.de, ns.work.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
hulk.work.de, ns.work.de
NS in the zone
hulk.work.de, ns.work.de
NameserverAddressesNetwork (AS)Glue
hulk.work.de213.158.112.20 2a00:12d0:1000:500::20AS13101 TNG-AS - TNG Stadtnetz GmbH, DE AS13101 TNG-AS - TNG Stadtnetz GmbH, DE213.158.112.20 2a00:12d0:1000:500::20
ns.work.de212.12.32.174 2a00:ea8:200::35AS9211 WORK-AS - Nawork Internet Informationssysteme GmbH, DE AS9211 WORK-AS - Nawork Internet Informationssysteme GmbH, DE212.12.32.174 2a00:ea8:200::35

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: hulk.work.de, ns.work.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.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS13101 (TNG-AS - TNG Stadtnetz GmbH, DE): 2 addresses; AS9211 (WORK-AS - Nawork Internet Informationssysteme GmbH, 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

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
hulk.work.de 213.158.112.20NOERROR, 14 ms, authoritativenoyes / yesrefused-
hulk.work.de 2a00:12d0:1000:500::20NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns.work.de 212.12.32.174NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns.work.de 2a00:ea8:200::35NOERROR, 14 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 2026072702 · primary ns.work.de

Found

Primary (MNAME)
ns.work.de
Contact (RNAME)
hostmaster.work.de
Serial
2026072702
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
hulk.work.de (213.158.112.20)2026072702
hulk.work.de (2a00:12d0:1000:500::20)2026072702
ns.work.de (212.12.32.174)2026072702
ns.work.de (2a00:ea8:200::35)2026072702

Checks

  • ✓ Serial 2026072702 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.work.de is one of the listed nameservers.
  • ✓ Contact hostmaster@work.de #25
    The SOA RNAME hostmaster.work.de means hostmaster@work.de.
  • ✓ Date-based serial #26
    The serial 2026072702 follows the YYYYMMDDnn convention (2026-07-27).

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

10 records at the apex

Found

Read from
213.158.112.20:53
TypeValueTTL
SOAns.work.de. hostmaster.work.de. 2026072702 28800 7200 604800 8640028800
NSns.work.de.28800
NShulk.work.de.28800
A212.12.36.2928800
AAAA2a00:ea8:8122::10028800
MX10 mailgate2.work.de.3600
MX10 mailgate1.work.de.3600
TXT"google-site-verification=CQR2HNDYtBoW-hUk0pUDD-9zJvHS7QOn0vVaHPJTjto"28800
TXT"v=spf1 mx a ptr ip4:87.253.164.97/31 ip4:212.51.2.24/30 ip6:2a00:ea8:8122::1000 include:workspf.work.de -all"28800
TXT"google-site-verification=8juNslEivVWSynZNxud8cIDXRaRb47wsDkmxiL1OVZk"28800

Checks

  • ✓ TTLs within range #32
    TTLs: A 8h, AAAA 8h, MX 1h, NS 8h. The NS TTL at the parent is 1d and in the zone 8h; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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