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79
Total
70
DNS
90
Email
73
Security
50
Network
100
Availability
Domainzkm.de
IPv41
IPv60
MX records4
StatusActive
Domain technical report

Zentrum für Kunst und Medien | ZKM

zkm.de

Das ZKM Karlsruhe ist eine weltweit einzigartige Kulturinstitution – Erleben Sie vielfältige Ausstellungen und Veranstaltungen rund um das Thema Medienkunst.

Generated: 2026-08-10T23:09:00-05:00 · Cached result

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IPv41
IPv60
MX4
NS4

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

!
IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

4 NS record(s); 2 or more required.

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

!
DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

!
CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

4 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

✓
DMARC25 / 25 pts · Mail

DMARC policy published.

✓
DKIM20 / 20 pts · Mail

A DKIM selector was verified.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

141 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers8 / 35 pts · Security

2 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: www.zkm.de

i
IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

!
IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓
DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓
HTTP response40 / 40 pts · Availability

HTTP/1.1 200 OK

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)
193.197.168.188

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

4 record(s)
30 a1431.mx.srv.dfn.de.
30 b1431.mx.srv.dfn.de.
20 fortimail.zkm.de.
30 c1431.mx.srv.dfn.de.

TXT

4 record(s)
"google-site-verification=dfBtFSTRo66eUH0dc-sNg4bgbntbz6XMYMtltsq0VNk"
"v=spf1 ip4:193.197.168.0/22 ip4:193.197.172.0/24 ip4:54.246.220.150 ip4:54.246.224.90 ip4:208.91.114.151 include:_spf.rexx-suite.com include:mailgun.org ~all"
"apple-domain-verification=cAkT3PrPl281VWdI"
"bw=uqDW9nAlzCDNMWAcBdwFxqxDG8NQwsy8XYnJky3DDDSz"

NS

4 record(s)
dns.zkm.de.
infoblox.zkm.de.
dns3.belwue.de.
dns1.belwue.de.

SOA

1 record(s)
infoblox.zkm.de. hostmaster.zkm.de. 2022114623 10800 3600 2419200 900

CAA

0 record(s)
—

Not configured

DS

0 record(s)
—

Not configured

DNSKEY

0 record(s)
—

Not configured

RRSIG

0 record(s)
—

Not configured

NSEC

0 record(s)
—

Not configured

NSEC3

0 record(s)
—

Not configured

SRV

0 record(s)
—

Not configured

NAPTR

0 record(s)
—

Not configured

TLSA

0 record(s)
—

Not configured

SSHFP

0 record(s)
—

Not configured

SPF

Configured
v=spf1 ip4:193.197.168.0/22 ip4:193.197.172.0/24 ip4:54.246.220.150 ip4:54.246.224.90 ip4:208.91.114.151 include:_spf.rexx-suite.com include:mailgun.org ~all

DMARC

Configured
v=DMARC1; p=none;

DKIM

Selector smtp
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAo6mT0k+bDXAn5p/HwPjI0cTizgWwfMakdo0OxTOUAcvAthBHVWH1DWpMMJHsnx0GkmIH1sWNLFOVkINIpthFDiqyXu8n/g05Lo8t0DNG/VA7EvNWIQzM5piCQ4nyMt4o/QQcNIv8YpRKNzGecACKXiRbRB8XZDhq97LxTRKQvwB1xOsFVO5gXHKzw49nyx+8ZjWc02zwcvCwz2DIB34q8o+2gdPXL+iwvID6ViTZJyaIfsn9tXOWhfnZvwp0urddcb6P+byYiWfUZpSBYrhs+++gn8GjB61/ateLluTOIHNSGXAdpZzL4Lh80onVv2zolf+7IoWs3NvAI96YiMX6AwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Zentrum für Kunst und Medien | ZKM
Description
Das ZKM Karlsruhe ist eine weltweit einzigartige Kulturinstitution – Erleben Sie vielfältige Ausstellungen und Veranstaltungen rund um das Thema Medienkunst.
Final URL
https://zkm.de/de
HTTP status
200

HTTP

Status
HTTP/1.1 200 OK
Final URL
https://zkm.de/de
Version
2
Server
nginx/1.18.0
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Hellenic Academic and Research Institutions CA
CN
zkm.de
Valid from
2025-12-30T04:12:33-06:00
Valid until
2026-12-30T04:12:33-06:00
Days remaining
141
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

2 active
—
HSTSNot detected
—
Content Security PolicyNot detected
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
—
Referrer PolicyNot detected
—
Permissions PolicyNot detected
—
Cross-Origin-Opener-PolicyNot detected
—
Cross-Origin-Embedder-PolicyNot detected
—
Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
193.197.168.188
43,37 ms
Cloudflare
1.1.1.1
193.197.168.188
29,33 ms
Quad9
9.9.9.9
193.197.168.188
33,61 ms
OpenDNS
208.67.222.222
193.197.168.188
693,22 ms
AdGuard
94.140.14.14
193.197.168.188
325,61 ms

IP, geolocation and ASNAssociated network information

193.197.168.188

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No

SMTPEmail port connectivity

a1431.mx.srv.dfn.de

Port 25: Closed/unreachable - 114.5 ms - 
Port 465: Closed/unreachable - 4139.5 ms - 
Port 587: Closed/unreachable - 4019.9 ms -

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