giga-hamburg.de

Checked 21 October 2026, 22:40 UTC · via 8.8.8.8
!Passed with warnings
25 passed 1 warning 0 failed 7 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

bart.ns.cloudflare.com, eve.ns.cloudflare.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
bart.ns.cloudflare.com, eve.ns.cloudflare.com
NS in the zone
bart.ns.cloudflare.com, eve.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
bart.ns.cloudflare.com172.64.33.71 173.245.59.71 108.162.193.71 2803:f800:50::6ca2:c147 2606:4700:58::adf5:3b47 2a06:98c1:50::ac40:2147AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-
eve.ns.cloudflare.com108.162.194.204 172.64.34.204 162.159.38.204 2803:f800:50::6ca2:c2cc 2606:4700:50::a29f:26cc 2a06:98c1:50::ac40:22ccAS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: bart.ns.cloudflare.com, eve.ns.cloudflare.com.
    #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 6 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 12 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • i
    All nameserver names under .com
    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

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
bart.ns.cloudflare.com 172.64.33.71NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
bart.ns.cloudflare.com 173.245.59.71NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
bart.ns.cloudflare.com 108.162.193.71NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
bart.ns.cloudflare.com 2803:f800:50::6ca2:c147NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
bart.ns.cloudflare.com 2606:4700:58::adf5:3b47NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
bart.ns.cloudflare.com 2a06:98c1:50::ac40:2147NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
eve.ns.cloudflare.com 108.162.194.204NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
eve.ns.cloudflare.com 172.64.34.204NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
eve.ns.cloudflare.com 162.159.38.204NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
eve.ns.cloudflare.com 2803:f800:50::6ca2:c2ccNOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
eve.ns.cloudflare.com 2606:4700:50::a29f:26ccNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
eve.ns.cloudflare.com 2a06:98c1:50::ac40:22ccNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2

Checks

  • ✓ All respond #14
    All 12 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: bart.ns.cloudflare.com: "2026.10.2"; eve.ns.cloudflare.com: "2026.10.2". Hide or replace the version string.
    #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 2418037772 · primary bart.ns.cloudflare.com

Found

Primary (MNAME)
bart.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2418037772
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
bart.ns.cloudflare.com (172.64.33.71)2418037772
bart.ns.cloudflare.com (173.245.59.71)2418037772
bart.ns.cloudflare.com (108.162.193.71)2418037772
bart.ns.cloudflare.com (2803:f800:50::6ca2:c147)2418037772
bart.ns.cloudflare.com (2606:4700:58::adf5:3b47)2418037772
bart.ns.cloudflare.com (2a06:98c1:50::ac40:2147)2418037772
eve.ns.cloudflare.com (108.162.194.204)2418037772
eve.ns.cloudflare.com (172.64.34.204)2418037772
eve.ns.cloudflare.com (162.159.38.204)2418037772
eve.ns.cloudflare.com (2803:f800:50::6ca2:c2cc)2418037772
eve.ns.cloudflare.com (2606:4700:50::a29f:26cc)2418037772
eve.ns.cloudflare.com (2a06:98c1:50::ac40:22cc)2418037772

Checks

  • ✓ Serial 2418037772 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h46m40s, retry 40m, expire 7d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver bart.ns.cloudflare.com is one of the listed nameservers.
  • ✓ Contact dns@cloudflare.com #25
    The SOA RNAME dns.cloudflare.com means dns@cloudflare.com.
  • ✓ Timestamp serial #26
    The serial 2418037772 is a Unix timestamp (2046-08-16 13:09 UTC).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
22 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
2371ECDSAP256SHA256 (13)SHA256 35F3125FFB151205…yes

DNSKEY in the zone

Key tagRoleAlgorithm
2371KSK (257)ECDSAP256SHA256 (13)
34505ZSK (256)ECDSAP256SHA256 (13)

Checks

  • ✓ Signed and validated #27
    The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
  • ✓ DS matches a key #28
    The DS record at the parent matches a key in the zone: key tag 2371 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 50h0m0s and created on demand; the current one was made at 2026-10-20 21:40 UTC and expires at 2026-10-22 23:40 UTC.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

info

16 records at the apex

Found

Read from
172.64.33.71:53
TypeValueTTL
SOAbart.ns.cloudflare.com. dns.cloudflare.com. 2418037772 10000 2400 604800 18001800
NSbart.ns.cloudflare.com.86400
NSeve.ns.cloudflare.com.86400
A76.76.21.213600
MX10 gigahamburg-de01b.mail.protection.outlook.com.3600
TXT"HARICA-cd97TxZzQlkXAdTdcfQ"3600
TXT"VL1i1D67tyDbZw8HY78k5nvzwQ6b2OWAPxRTIvz7yRVYpYr2r7dMTtq9YMgq5bJnnvv2wjEY0wSosrQSS+NJig=="3600
TXT"ZOOM_verify_xDd2MBPTSbiy22JqIrXxxQ"3600
TXT"anthropic-domain-verification-4qbx0d=nx1cfAd7nOStUbW4r4j0RI0zt"3600
TXT"apple-domain-verification=yDjxiAgnxp6OPVwN"3600
TXT"google-site-verification=-f6pchS9r_pgP4k2Q4MUZDOo1BF0hp5u0HSATyzxwDY"3600
TXT"google-site-verification=NjEzdBfudThnH_9QG4SnMuvRx5JjbfqrlAFtzlMA7aM"3600
TXT"linkedin-site-verification=b363c300-4064-474a-8f55-44aa4203ab42"3600
TXT"openai-domain-verification=dv-pjy1bcwUWjj8gSsIkUSFwUvJ"3600
TXT"v=spf1 a mx include:servers.mcsv.net include:amazonses.com include:spf.protection.outlook.com include:spf.mailing.easy.cz include:148818020.spf07.hubspotemail.net ip4:213.61.208.238 ip4:84.46.72.81 ~all"3600
TXT"xmind-domain-verification-f67qx2=swJLLXeWJBhPR7wKHVi11ZZgS"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 1d.
  • ✓ 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