dns.pizza
Domain Intelligence Report

cdu.de

Full ownership history report — $29 at AboutUsCompare
Gathering intelligence... (12/12)
DNS
WHOIS
Security
Email
DNSSEC
Threats
Deliverability
SSL/TLS
HTTP
Tech Stack
Subdomains
Archive
Safe
2 concerns
no attacks or spoofing
Up
HTTP 200
reachable and responding
Right
Set up Page Watch
it is what it is
Ready
29d to renew
you see what's coming
Outline
WHOIS
—
DNS
1 A · 1 MX · 4 NS · 1 PTR · 1 SOA · 11 TXT
SSL/TLS
Let's Encrypt · TLSv1.3 · ⚠ 29d left · 2 SANs
Email Auth
SPF ✗ · DKIM ✓ · DMARC ✓ (p=reject)
DNSSEC
not signed
Tech Stack
Email: Self-hosted
HTTP
2 redirect → 200 · HSTS ✓ · CSP ✓ · X-Frame ✗ · Nosniff ✗
Security
B (170/215) · 2 high
Threats
risk: medium
Deliverability
96% A+ (96/100 points) · 1 MX · 1 IPs · 1 issue(s)
Subdomains
0 found · 25 answered (87 timed out)
Web Archive
first snapshot 1996-10-31 · 30y archived
DNS Recordschecked 7.9d ago
Details
1 A · 1 MX · 4 NS · 1 PTR · 1 SOA · 11 TXT
WHOISchecked 7.9d ago
Details
Renewal history →
Then vs Nownew
No card for this name. We compare then and now for domains that are in the top million and had an AboutUs page. That says nothing about this domain’s age or safety.
Check what it is now →
SSL/TLSchecked 7.9d ago
Details
Valid certificate
Issuer: Let's Encrypt
Protocol: TLSv1.3
Expires in 29 days
2 SAN(s)
Securitychecked 7.9d ago
Details
B
170/215
2 high1 medium
Weakest: Basic Security, Advanced Security
Email Authchecked 7.9d ago
Details
SPFDKIMDMARC
Policy: reject
DNSSECchecked 7.9d ago
Details
Not DNSSEC-signed
Tech Stackchecked 7.9d ago
Details
Email: Self-hostedGoogle Search ConsoleApple Business
HTTP / Headerschecked 7.9d ago
Details
2 redirect(s) → 200
HSTSCSPX-FrameNosniff
Threatschecked 7.9d ago
Details
Risk: medium · score 0.6999999999999998
Zone census
Subdomainschecked 7.9d ago
Details
0 found · 25 answered · 87 timed out (unknown)
Click a subdomain for its full report
Web Archivechecked 7.9d ago
Details
First archived: 1996-10-31
~30 years of history
Deliverabilitychecked 7.9d ago
Details
96%A+
96/100 points · 1 issue(s)
1 MX · 1 IP(s)

IPv6

Not checked yet. aaaa.bot has no recent IPv6 result for cdu.de. Run the check on aaaa.bot →

See where it lives on the IPv4 map →

Lineage

Our records: Jan 5, 2009 → Feb 15, 2009

These dates are when our records begin, not when the domain was registered.

DNS provider

  • arcor-ip.de + cdu.de
    Jan – Feb 2009

Solid bar: the stretch we observed that name. Dot: a single sighting. Dotted line: no record between sightings of the same name. Nothing is drawn between different names.

DNS provider, WHOIS snapshots: 4 WHOIS/RDAP snapshots that listed nameservers, 2009-01-05 to 2009-02-15 (who.is archive). Both sources feed one row per provider (hover a bar to see which); a change is placed between the nearest observations on either side, and where the two sources disagree, both are listed under What changed.

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Explore related

TLD.de domainsDNS providerarcor-ip.de nameserversIPv6Does cdu.de have IPv6?