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Total

100

DNS

100

Email

Security

100

Network

100

Availability

Domainactive24.cz

IPv43

IPv63

MX records1

StatusActive

Domain technical report

Domény a profesionální webhosting | Active24

active24.cz

Vrhněte se do online světa! Vytvořte si vlastní www stránky nebo e-shop. Zajistíme vám 100% bezpečný webhosting s nepřetržitou zákaznickou podporou.

Generated: 2026-08-10T00:10:14-05:00 · Cached result

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IPv43

IPv63

MX1

NS3

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

3 IPv4 address(es) detected.

✓

IPv6 (AAAA)10 / 10 pts · Dns

3 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 policy5 / 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.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

✓

DKIM20 / 20 pts · Mail

A DKIM selector was verified.

✓

MTA-STS5 / 5 pts · Mail

Mail transport policy.

✓

TLS-RPT5 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

169 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers16 / 35 pts · Security

4 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: 172.169.9.37.in-addr.arpa.websupport.sk

✓

IPv4 diversity35 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓

IPv6 connectivity35 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓

HTTP response40 / 40 pts · Availability

HTTP/2 200

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

3 record(s)

37.9.169.172
37.9.169.171
37.9.169.173

AAAA

3 record(s)

2a00:4b40:1000:4:37:9:169:171
2a00:4b40:1000:4:37:9:169:173
2a00:4b40:1000:4:37:9:169:172

CNAME

0 record(s)

—

Not configured

MX

1 record(s)

10 mx.spamfilter.io.

TXT

6 record(s)

"v=spf1 mx ip4:81.95.96.0/20 ip4:31.15.8.0/21 ip4:185.12.196.0/22 ip4:185.26.229.213 ip6:2a02:4a8:ac24::/48 ip4:212.123.41.224/28 include:_spf.hostedemail.com include:servers.mcsv.net include:spf.spamfilter.io include:spf.protection.outlook.com includ" "e:spf-eu.emailsignatures365.com -all"
"OSSRH-58398"
"amazonses:eAOuVxlmO4a4k2BCjPK4EFOjyQUfFEFWniuTB0Dmphk="
"google-site-verification=4lO5Pxtc--qLdlzLBO92yZsZ-tZ8zm2BrhC-bCVPDL0"
"have-i-been-pwned-verification=10638c872e65592e7e9859936bddef7b"
"facebook-domain-verification=bxdobw5c71ymo1s50cisodul6ydxxt"

NS

3 record(s)

alfa.ns.active24.cz.
gama.ns.active24.sk.
beta.ns.active24.cz.

SOA

1 record(s)

alfa.ns.active24.cz. hostmaster.active24.cz. 2026080535 14400 3600 604800 3600

CAA

6 record(s)

0 iodef "mailto:caa@active24.cz"
0 issue "thawte.com"
0 issuewild "thawte.com"
0 issue "sectigo.com"
0 issuewild "sectigo.com"
0 issue "letsencrypt.org"

DS

1 record(s)

22941 13 2 A5CC673B7353D8255F9D980B38197FC5A701A861ABBA0E3EC773FE19 F971810E

DNSKEY

2 record(s)

257 3 13 0EK9ChwJW+CVCvP7mizQwEnR2OJpHgbLmilGV5OyqncZoOufo9fIbVrv xT6qid/T9sAWH7KOfzItPxkVOIbRjg==
256 3 13 /nQy2zr3e4XOvfJLSZG3heo563nNkPruFFR3vfE1O7VWQafpjOJS+SHS BNOT8ewTOexdxeEUnwoEVvHVle5TaA==

RRSIG

7 record(s)

A 13 2 3600 20260904092803 20260805092803 33072 active24.cz. ebxF62cqN6UfZk8KT1y2P2FCZWO1l3KMYWWHiRj2mtC3DeIFwW8QjNjE U2oepQKQ2qusUZaKsFjNY9bNUmWgGA==
AAAA 13 2 3600 20260904092803 20260805092803 33072 active24.cz. lV+7g5wk2FBRhUV42ZvDMUgnPDyvSVxxHrpSIbRBVl9GM6jViUOm/z0d QzCgxtAAIVa5wYVBV6E/Hk8CG83AIw==
DNSKEY 13 2 86400 20260904093004 20260805093004 22941 active24.cz. 87RVbCVfp0cQH33DyXIqT/POzExUUOe33i9YvQOPN7/KBpgqzQ5z+0tn DvOJwqj9aCTcpwyjps8H/wdLc3Kf8w==
DNSKEY 13 2 86400 20260904093004 20260805093004 33072 active24.cz. /peV9I7ECHcMH5XN+tVfv4JUEWH4Gv/zwxqS2N5TXsweyJD5Qieq4OYS DtdrdtMAkTX41Bf9xMpDFU6fMSRnfg==
NS 13 2 3600 20260904092717 20260805092717 33072 active24.cz. awY6kzaBn3gkzNTp/6V75bV0ov/LiXkED33PSGmtiao7v9omlDuvw8Sf H0tlIaGInwDG7wEA1EYKFcLMDAGfpw==
MX 13 2 600 20260904092717 20260805092717 33072 active24.cz. 27crl2RmBpaOG2mjwI4bN/MaFAmW5PLXCnzU7NMiZUgj/Y3ceu9Z1+cu 8S51HRcPLSknnS7KgO9kJPQtH1g0dw==
DS 13 2 3600 20260823054724 20260809041724 5166 cz. z9Be+pxIrqphn2AvSq0jdUCHWuXXCDbrsw11hG0qAwp24y9m3Zh/ya8s pHkUw8iahUd8uB0Za77GwoKrzU268g==

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 mx ip4:81.95.96.0/20 ip4:31.15.8.0/21 ip4:185.12.196.0/22 ip4:185.26.229.213 ip6:2a02:4a8:ac24::/48 ip4:212.123.41.224/28 include:_spf.hostedemail.com include:servers.mcsv.net include:spf.spamfilter.io include:spf.protection.outlook.com include:spf-eu.emailsignatures365.com -all

DMARC

Configured

v=DMARC1; p=quarantine; sp=quarantine; pct=100; rua=mailto:dmarc-report@active24.cz; ruf=mailto:dmarc-report@active24.cz; fo=0; ri=172800; aspf=r; adkim=r; rf=afrf

DKIM

Selector selector1

v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4j3le7GZAJ0gPfnw03V/0ZhiHYBOYw8MOQavwyO9NSprCfNSE4YIn3gbjg7/6OPSmWn+oZRSSMQidIo9iVPQuUS9fhbmEa2ZZwt8GzhnZxleYlJC77ZQq2PifPOYlG+TTYuzKsMWN0/IeWM27m7rapYXB7uRMLFrY9GIRKWXWc8jlPSv6rIXQkscneK6UhADr9ZLDAC8vCIFf3BzEQ3gwEJxBPRAOCP2k8V2vKQJezlrtFrkRM6qzfk4K6jkxF0xSOt39CjqfZtZf0BEAITH0EzcmXKGLWKsdVk/Cm8ENYDeLrGhQKAMMx3k7+CtpyiLdwUh5eGCjIG2+qte5+kihQIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Domény a profesionální webhosting | Active24

Description

Vrhněte se do online světa! Vytvořte si vlastní www stránky nebo e-shop. Zajistíme vám 100% bezpečný webhosting s nepřetržitou zákaznickou podporou.

Final URL

https://www.active24.cz/

HTTP status

206

HTTP

Status

HTTP/2 200

Final URL

https://www.active24.cz/

Version

Server

nginx

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

DigiCert Inc

*.active24.cz

Valid from

2026-01-25T18:00:00-06:00

Valid until

2027-01-26T17:59:59-06:00

Days remaining

169

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

4 active

✓

HSTSImplemented

✓

Content Security PolicyImplemented

—

X-Content-Type-OptionsNot detected

✓

X-Frame-OptionsImplemented

✓

Referrer PolicyImplemented

—

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

37.9.169.171, 37.9.169.172, 37.9.169.173

230,79 ms

Cloudflare

1.1.1.1

37.9.169.171, 37.9.169.172, 37.9.169.173

46,09 ms

Quad9

9.9.9.9

37.9.169.171, 37.9.169.172, 37.9.169.173

29,28 ms

OpenDNS

208.67.222.222

37.9.169.171, 37.9.169.172, 37.9.169.173

144,92 ms

AdGuard

94.140.14.14

37.9.169.171, 37.9.169.172, 37.9.169.173

67,72 ms

IP, geolocation and ASNAssociated network information

37.9.169.172

No data

success

country

region

city

asn

organization

isp

37.9.169.171

No data

success

country

region

city

asn

organization

isp

37.9.169.173

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

mx.spamfilter.io

Port 25: Closed/unreachable - 136.7 ms - 
Port 465: Closed/unreachable - 105.4 ms - 
Port 587: Closed/unreachable - 106.6 ms - 220 node3.spamfilter.io ESMTP Exim 20260804.1000 Mon, 10 Aug 2026 07:10:13 +0200

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