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68
Total
85
DNS
45
Email
65
Security
20
Network
100
Availability
Domaincas.cz
IPv41
IPv60
MX records1
StatusActive
Domain technical report

Akademie věd České republiky - Akademie věd České republiky

cas.cz

Akademie věd České republiky, veřejná neuniverzitní výzkumná instituce.

Generated: 2026-08-09T08:51:09-05:00 · Cached result

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IPv41
IPv60
MX1
NS3

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

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

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

✓
DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

!
CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

1 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

!
DMARC0 / 25 pts · Mail

DMARC policy not found.

!
DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

181 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

!
HTTP security headers0 / 35 pts · Security

0 of 9 evaluated headers detected.

!
PTR reverse DNS0 / 30 pts · Network

PTR not detected.

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/1.1 200 200

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)
147.231.163.240

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
10 cas-cz.mail.protection.outlook.com.

TXT

5 record(s)
"eZQUjdgG4Qz1lrWWUR2cbrxQzAfv6E8v5ZR6ERf7euQqDDSdKQQQ0MMjQLs5ERt6cGUN8tGMy8fMmLeoh4z5Ig=="
"google-site-verification=vUDwTSfcIbP-SZlB4YtOHK9HptYiG6lYnU2bDgAbgqs"
"v=spf1 ip4:147.231.58.32 ip4:147.231.163.131 include:spf.protection.outlook.com ~all"
"PS-1DE9E9D695DD8C6BCB650BF86B69107D861F5A07"
"MS=ms15273704"

NS

3 record(s)
visla.utia.cas.cz.
academy.cas.cz.
nsa.ces.net.

SOA

1 record(s)
visla.utia.cas.cz. root.utia.cas.cz. 2519 14400 3600 604800 86400

CAA

0 record(s)
—

Not configured

DS

1 record(s)
30302 13 2 96B427EE8A5999C0374E1AAC23152E0C6D4105E2620796531F441C68 020C2646

DNSKEY

1 record(s)
257 3 13 +Ox9WihX/mFx82TBELPVgqVnV9SRl1ckoDl0/LFikhajM+Zz5ZPPaV8Z AJpbCEaMaunaVbXJ6vk+JB+dLTso0Q==

RRSIG

3 record(s)
MX 13 2 86400 20260819113321 20260805113237 30302 cas.cz. VVFnD6i2iyaLSmtg/6k+3dg52dDg8lW39AfHAGXpnEvHcdtLkOAG9bcz lPEe8spQHVHBBHJDuvN7KmAzLRQP4A==
NS 13 2 86400 20260819113321 20260805113237 30302 cas.cz. LuetDlztTbUIKLpP1PGvPDdjAsQjiIzGVFeIKk4bPc5V6Fgk03t/RoAg cpwJZt4cGpRvANHKWyAjlQ43M3GjDA==
DS 13 2 3600 20260823054724 20260809041724 5166 cz. pCARssqexwGEJ1RPfhbOm+JtNiuduB2bryX+i9h8KOJL7xZ+7PkcWiRH Me+oa8oWBItWkITTYZ0811A3a+EsNA==

NSEC

1 record(s)
academia.cas.cz. A NS SOA MX TXT RRSIG NSEC DNSKEY CDS CDNSKEY

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 ip4:147.231.58.32 ip4:147.231.163.131 include:spf.protection.outlook.com ~all

DMARC

Not configured
—

Not configured

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Akademie věd České republiky - Akademie věd České republiky
Description
Akademie věd České republiky, veřejná neuniverzitní výzkumná instituce.
Final URL
https://www.avcr.cz/cs/
HTTP status
200

HTTP

Status
HTTP/1.1 200 200
Final URL
https://www.avcr.cz/cs/
Version
2
Server
OpenCms/11.0.x
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Hellenic Academic and Research Institutions CA
CN
avcr.cz
Valid from
2026-07-22T12:44:51-05:00
Valid until
2027-02-06T11:44:50-06:00
Days remaining
181
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

0 active
—
HSTSNot detected
—
Content Security PolicyNot detected
—
X-Content-Type-OptionsNot detected
—
X-Frame-OptionsNot detected
—
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
147.231.163.240
41,62 ms
Cloudflare
1.1.1.1
147.231.163.240
289,19 ms
Quad9
9.9.9.9
147.231.163.240
339,39 ms
OpenDNS
208.67.222.222
147.231.163.240
826,66 ms
AdGuard
94.140.14.14
147.231.163.240
149,41 ms

IP, geolocation and ASNAssociated network information

147.231.163.240

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

cas-cz.mail.protection.outlook.com

Port 25: Closed/unreachable - 25.3 ms - 
Port 465: Closed/unreachable - 4045.2 ms - 
Port 587: Closed/unreachable - 4011.9 ms -

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