ccc.de

Checked 21 October 2026, 22:06 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

pass

ns.ber.ccc.de, ns.dus.ccc.de, ns.ham.ccc.de, s-dns.irz42.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.ber.ccc.de, ns.dus.ccc.de, ns.ham.ccc.de, s-dns.irz42.net
NS in the zone
ns.ber.ccc.de, ns.dus.ccc.de, ns.ham.ccc.de, s-dns.irz42.net
NameserverAddressesNetwork (AS)Glue
ns.ber.ccc.de185.106.84.99 2a02:8000:1000:103::99AS50472 CHAOS-AS - Chaos Computer Club e.V., DE AS50472 CHAOS-AS - Chaos Computer Club e.V., DE185.106.84.99 2a02:8000:1000:103::99
ns.dus.ccc.de46.228.205.53 2001:4ba0:92c1:9f::53AS24961 MYLOC-AS - WIIT AG, DE AS24961 MYLOC-AS - WIIT AG, DE46.228.205.53 2001:4ba0:92c1:9f::53
ns.ham.ccc.de212.12.55.77 2a00:14b0:4200:3000:23:55:0:77AS13135 CREW-AS - Wieske_s Crew GmbH, DE AS13135 CREW-AS - Wieske_s Crew GmbH, DE212.12.55.77 2a00:14b0:4200:3000:23:55:0:77
s-dns.irz42.net212.12.50.130 2a00:14b0:4200:3280::130AS13135 CREW-AS - Wieske_s Crew GmbH, DE AS13135 CREW-AS - Wieske_s Crew GmbH, DE-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns.ber.ccc.de, ns.dus.ccc.de, ns.ham.ccc.de, s-dns.irz42.net.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns.ber.ccc.de, ns.dus.ccc.de, ns.ham.ccc.de.
  • ✓ 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 3 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS13135 (CREW-AS - Wieske_s Crew GmbH, DE): 4 addresses; AS24961 (MYLOC-AS - WIIT AG, DE): 2 addresses; AS50472 (CHAOS-AS - Chaos Computer Club e.V., 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

info

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.ber.ccc.de 185.106.84.99NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns.ber.ccc.de 2a02:8000:1000:103::99NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns.dus.ccc.de 46.228.205.53NOERROR, 8 ms, authoritativenoyes / yesrefused-
ns.dus.ccc.de 2001:4ba0:92c1:9f::53NOERROR, 8 ms, authoritativenoyes / yesrefused-
ns.ham.ccc.de 212.12.55.77NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns.ham.ccc.de 2a00:14b0:4200:3000:23:55:0:77NOERROR, 41 ms, authoritativenoyes / yesrefused-
s-dns.irz42.net 212.12.50.130NOERROR, 13 ms, authoritativenoyes / yesrefusedToaster connected to coffee cup [tm]
s-dns.irz42.net 2a00:14b0:4200:3280::130NOERROR, 41 ms, authoritativenoyes / yesrefusedToaster connected to coffee cup [tm]

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: s-dns.irz42.net: "Toaster connected to coffee cup [tm]".
    #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 2026092402 · primary ns.ham.ccc.de

Found

Primary (MNAME)
ns.ham.ccc.de
Contact (RNAME)
hostmaster.ccc.de
Serial
2026092402
Refresh / retry
43200 s / 7200 s
Expire
2419200 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns.ber.ccc.de (185.106.84.99)2026092402
ns.ber.ccc.de (2a02:8000:1000:103::99)2026092402
ns.dus.ccc.de (46.228.205.53)2026092402
ns.dus.ccc.de (2001:4ba0:92c1:9f::53)2026092402
ns.ham.ccc.de (212.12.55.77)2026092402
ns.ham.ccc.de (2a00:14b0:4200:3000:23:55:0:77)2026092402
s-dns.irz42.net (212.12.50.130)2026092402
s-dns.irz42.net (2a00:14b0:4200:3280::130)2026092402

Checks

  • ✓ Serial 2026092402 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 2h, expire 28d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.ham.ccc.de is one of the listed nameservers.
  • ✓ Contact hostmaster@ccc.de #25
    The SOA RNAME hostmaster.ccc.de means hostmaster@ccc.de.
  • ✓ Date-based serial #26
    The serial 2026092402 follows the YYYYMMDDnn convention (2026-09-24).

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

11 records at the apex

Found

Read from
185.106.84.99:53
TypeValueTTL
SOAns.ham.ccc.de. hostmaster.ccc.de. 2026092402 43200 7200 2419200 864007200
NSns.ber.ccc.de.7200
NSns.dus.ccc.de.7200
NSns.ham.ccc.de.7200
NSs-dns.irz42.net.7200
A185.106.84.1007200
AAAA2a02:8000:1000:103::1007200
MX5 nomail.ccc.de.7200
MX10 mail.ccc.de.7200
MX23 nomail2.ccc.de.7200
TXT"Chaos Computer Club, Hamburg, Germany"7200

Checks

  • ✓ TTLs within range #32
    TTLs: A 2h, AAAA 2h, MX 2h, NS 2h. The NS TTL at the parent is 1d and in the zone 2h; 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